LC7232-8291 1-Chip Controller Preliminary Overview LC72

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LC7232-8291 1-Chip Controller Preliminary Overview LC72

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Ordering number:ENN 3673
LC7232-8291
1-Chip Controller
Preliminary Overview
LC7232-8291 single-chip microcontroller that best suited electronics tuning applications. includes internal (Phase Locked Loop) circuitry that used over world, driver circuitry, remote control function anti-theft thief proof) function.
Package Dimensions
unit:mm 3044B-QIP80A
[LC7232-8291]
26.0 20.0 0.35 0.15 2.45max 2.15
Features
On-chipped infrared remote control receiver circuit Transmitter IC=LC7461M (remote non-wired control wired control). On-chipped ANTI-THEFT function. Preset Memory function channels (Max.)= (FM1+FM2+FM3+VF+MW (MW1)+LM (with last channel storage). Auto Preset Memory function Based intensities electric fields. Radio monitor function. function (Keys, OUT). Tape function DIRECTION display on/off input signals. Abundant tape DOUBLE FUNCTION selections Independent keys added. On-chipped DKcount function. Preset Memory write modes Tape character display function. Power Key. Diode matrix selections World-wide version.
20.0 14.0
0.35
22.6
SANYO QIP80A
SANYO products described contained herein have specifications that handle applications that require extremely high levels reliability, such life-support systems, aircraft's control systems, other applications whose failure reasonably expected result serious physical and/or material damage. Consult with your SANYO representative nearest before using SANYO products described contained herein such applications. SANYO assumes responsibility equipment failures that result from using products values that exceed, even momentarily, rated values (such maximum ratings, operating condition ranges,or other parameters) listed products specifications SANYO products described contained herein.
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
11502TN (KT)/D250JN, No.3673-1/33
16.6
LC7232-8291
Assignment
No.3673-2/33
LC7232-8291
Frequencies
Band 87.5-107.9 530-1720 87.5-107.9 530-1620 87.5-107.9 531-1620 87.5-107.9 531-1719 87.5-108.0 530-1720 87.5-108.0 530-1620 87.5-108.0 531-1620 87.5-108.0 531-1719 87.5-108.0 522-1620 153-281 87.5-108.0 531-1620 153-281 87.5-108.0 522-1620 153-281 87.5-108.0 531-1620 153-281 87.5-108.0 522-1620 146-290 87.5-108.0 531-1620 146-290 87.5-108.0 522-1620 146-290 87.5-108.0 531-1620 146-290 76.0-90.0 522-1629 87.5-108.0 531-1602 87.5-108.0 531-1602 64.0-108.0 522-1620 -10.7 -10.7 -10.7 tolerance off)
Notes Europe area, diode matrix `SHIFT' used select desired frequency. (9)s STEP STEP values that will effective with count inactive Auto Tuning mode.
Specifications
Absolute Maximum Ratings 25°C, VSS=0V
Parameter Supply voltage Input voltage Output voltage Symbol VIN1 VIN2 VOUT1 VOUT2 IOUT1 IOUT2 IOUT3 Allowable power dissipation Operating temperature Storage temperature Topr Tstg Conditions HOLD, INT, RES, meter, BACKUP Input other than VIN1 AM/FM Output other than VOUT1 AM/FM, BEEP, POWER, IFCNT, MO/ST, Ta=-40 +85°C Ratings -0.3 +6.5 -0.3 -0.3 VDD+0.3 -0.3 -0.3 VDD+0.3 +125 Unit
Output current
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Recommended Operating Conditions +85°C, VDD=3.5 5.5V
Parameter Symbol VDD1 Supply voltage VDD2 VDD3 VIH1 VIH2 VIH3 Input high-level voltage VIH4 VIH5 VIH6 VIL1 VIL2 VIL3 Input low-level voltage VIL4 VIL5 VIL6 VIL7 fIN1 fIN2 Input frequency fIN3 fIN4 fIN5 VIN1 VIN2 VIN3 VIN4 Input voltage range VIN5 CPU, operation operation Memory hold REMOCONIN, STEREO, RES, INT, HOLD BACKUP T14, BEEP, POWER, IFCNT, AMUTE, MO/ST LCTR REMOCONIN, STEREO, RES, BACKUP T14, BEEP, POWER, IFCNT, AMUTE, MO/ST LCTR HOLD XIN, VIN1, VDD1 FMIN, VIN2, VDD1 AMIN (MW, LW), VIN3, VDD1 HCTR (FMIF, AMIF), VIN4, VDD1 LCTR AMIF VIN3, VDD1, DKsig VIH6, VIL6, VDD1 FMIN AMIN HCTR meter Conditions Ratings
0.7VDD 0.8VDD
0.3VDD 0.2VDD
Unit Vrms Vrms Vrms Vrms
0.6VDD 0.7VDD 0.8VDD
0.50 0.10 0.15 0.10
0.2VDD 0.3VDD 0.2VDD 0.4VDD
500k
Input amplitude
Electrical Characteristics line with recommended operating conditions)
Parameter Hysteresis voltage Reject pulse width Power-down detect voltage Symbol PREJ VDET IIH1 Input high-level current IIH2 IIH3 IIH4 IIH4 IIL1 IIL2 IIL3 IIL4 Input floating voltage Pull-down resistor IOFFH1 Output high-level leakage current IOFFH2 IOFFH3 IOFFL1 Output low-level leakage current IOFFL2 INT, HOLD, RES, meter, BACKUP, REMOCONIN, STEREO, DIR, VI=5.5V T14, BEEP, POWER, IFCNT, MO/ST, AMUTE output-off, VI=VDD XIN, VI=VDD=5.0V FMIN, AMIN, HCTR, LCTR, VI=VDD=5.0V VI=VDD=5.0V VI=VSS VI=VSS VI=VSS VI=VSS EO1, EO2, VO=VDD T14, BEEP, POWER, IFCNT, MO/ST, AMUTE, S28, VO=VDD AM/FM, VO=13V EO1, EO2, VO=VSS T14, BEEP, POWER, IFCNT, MO/ST, AMUTE, VO=VSS 0.01 0.01 RES, BACKUP Conditions Ratings 0.1VDD
0.05VDD
Unit
Input low-level current
Continued next page.
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Continued from preceding page.
Parameter Symbol VOH1 VOH2 Output high-level voltage VOH3 VOH4 VOH5 VOH6 VOH7 VOL1 VOL2 VOH3 Output low-level voltage VOH4 VOH5 VOH6 VOH7 VOH8 Output intermediate-level voltage conversion error IDD1 IDD2 Supply current IDD3 IO=1mA T14, BEEP, POWER, IFCNT, MO/ST, AMUTE, S28, IO=1mA EO1, EO2, IO=500µA XOUT, IO=200µA S28, IO=-0.1mA T11, IO=5mA COM1, COM2, IO=20µA IO=1mA T14, BEEP, POWER, IFCNT, MO/ST, AMUTE, S28, IO=1mA EO1, EO2, IO=500µA XOUT, IO=200µA S28, IO=0.1mA T11, IO=5mA COM1, COM2, IO=20µA AM/FM, IO=5mA COM1, COM2, VDD=5V, IO=20µA meter, VDD1 VDD1, fIN=130MHz VDD2, stop HOLD mode. Fig. VDD=5.5V. stop. Ta=25°C. BACK mode. Fig. VDD=2.5V. stop. Ta=25°C. BACK mode. Fig. 0.75 (150) -1/2 Conditions Ratings VDD-2.0 VDD-1.0 VDD-0.5 VDD-1.0 VDD-1.0 VDD-1.0 VDD-1.0 VDD-1.0 VDD-0.7 VDD-0.5 VDD-0.35 (400) +1/2 Unit
Note BEEP, POWER, IFCNT, AMUTE, MO/ST, AM/FM, S28, COM1 COM2=`Open'
Fig. IDD2 test circuit HOLD mode
Note BEEP, POWER, IFCNT, AMUTE, MO/ST, AM/FM, S28, COM1 COM2=`Open'
Fig. IDD3 test circuit BACK mode
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Diode Matrix
DOWN
AMEM
RMON
IFSHIFT
PRIORITY
COUNT
DISPLAY
FKEY
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Description
TEST2 Name Connected with 4.5kHz X'tal (Crystal) oscillator. Connected (active low) used LC7461M RADIO mode will activated 500ms later after HOLD display will activated 500ms later after HOLD changes This used indicate 'direction' during TAPE mode. this level with DIMRX 'TAPE IND'=0, will turned that level 'L', will turned Radio source select. This (Open Drain) type Tape source select. This (Open Drain) type output circuit, which requires pull-up resistor addition. source select. This (Open Drain) type output circuit, which requires pull-up resistor addition. output=FM. H-level output=AM. 'L', will HOLD (active low) becomes active (clock selected), mode activated. Controls 'DNR' display (preset digit display character) display will DIMRX 'NR'='1' (DNR-C selection) Audio mute control output. This will HOLD ON-OFF control signal count buffer. This signal will mode. other cases, level will remain Low. HOLD becomes inactive ('H'). other cases, level will This output will power (when POWER This signal will become effective when SKIN signal remains same time SKIN='L' will repeatedly checked. more details, refer timing section. This signal effective This signal will become active about 50ms valid power source select output. 'LOUD' display OFF. This signal will effective only select control operation being carried with 'LOC' display 'L'. Note that output signal effective power with This signal will active only when 'NR' preset digit display turned TAPE mode. they Open Open Open Open Direct connection Direct connection
Direct connection VDD. Open Open Open Open Open
Open Open
Open
CDOUT
Open Open
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Continued from preceding page.
Name COM2 COM1 Name COMMON driver COMMON driver COM1 (MW2) Functional description This signal will active only when 'MTL' turned scan scan scan scan scan scan scan supply voltage input COM2 LOUD RMON colon (MW1) Unused handling Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open Open
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Name
Functional description REMOTE CONTROL signal input. This requires pull-up resistor externally added. POWER ON/OFF detect input. This preceded POWER closed circuit. changes from 'L', -With clock oscillation does stop clock count will started. (BACKUP mode, IDD=5µA (Max.)) Direct connection VDD. meter signal input input signal should within range between 3.2V. input signal exceeds upper limit (3.2V), should reach chip resistor divider. This should connected chip stores signals FMIF AMIF inputs. input signals should reach chip Tolerance 10kHz 3kHz 0.6kHz AMIF inputs. input signals should reach chip through Tolerance 3kHz 0.6kHz input signal measured 384ms three times frequency within range between 115Hz 135Hz
HCTR
HCTR
application without ANTI-THEFT function, this used SKIN (active low). level 'L', display turned This input same function TRMRX This used detect MEMO line desconnection. drower type ANTI-THEFT thief-proof) TYPE supply voltage input through coupling greater than 100mV (rms). local input. input signal should reach chip through coupling greater than 100mV (rms). Filter). Same pin. Filter). Same pin. Connected 4.5MHz X'tal (crystal) oscillator.
TEST1
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Diode Matrix (DIMRX) Select
Functional Description Selects clock function current drain (IDD) will 0.7mA clock operation mode with ACC='OFF' Does select clock function current drain (IDD) will (Max.) after chip enters BACKUP operation mode with ACC='OFF' (HOLD ='L'). Selects function CDIN enabled. CDOUT level will when CDIN changes 'L'.
without diode, with diode
SELE
Does select With key, display changes order 'off' then 'DNR' indicates each mode.
TYPE
Frequency, TAPE displays given priority. count FMIF been selected (DIMRX 'CLOCK'=0).
SELE COUNT
Activates auto retune mode auto retune mode will started SKIN (active low) ='H' continues seconds mode. ALARM output still effective. Allows signals reach LCTR counted. This effective only with DIMRX ELEC Disables count. DKcount carried inside discriminator while TRMRX DKIN
SEEK operation jumps 9-kHz step mode from manual mode.
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Diode matrix name ANTI THEFT POWER CLOCK DISPLAY TAPE This allows indicated four characters displayed 7-segment panel, irrespective clock mode selection. /off four characters such displayed 7-segment display panel. Selects ANTI-THEFT function. Does select ANTI-THEFT function. Inactivates clock display during off-power. Activates clock display during off-power. Enables TAPE direction indication. Didables TAPE direction indication. Functional Description
7-segment display turned order shown below. segment blanking starts from segment marked upper-pointed arrow. blanking speed from segment next segment 0.5s. segments always turned while operation continues accordance with directions indicated arrows. Display mode selection FORWARD operation mode, PLAY=0.5s, FF=125ms (with TRMRX 'FF'='L'). REVERSE operation mode, REW=125ms (with TRMRX 'FF'='L'). Display mode selection REVERSE operation mode, PLAY=0.5s, FF=125ms (with TRMRX 'FF'='L'). FORWARD operation mode, REW=125ms (with TRMRX 'FF'='L').
DOUBLE FUNCTION0 FUNCTION1 FUNCTION2
DOUBLE FUNCTION keys available RADIO TAPE modes shown table below. keys have their purposes. table indicates that DOUBLE FUNCTION assigned. FUNCTION2 FUNCTION1 FUNCTION0
FKEY0 FKEY1
TAPE mode, keys used APS, MTL. However, those keys effective RADIO mode. functions effective during clock display with DIMRX 'CLOCK'=0. FKEY1 FKEY0
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Transistor Matrix (TRMRX) Input
TAPE Controls DIRECTION indication TAPE mode with DIMRX 'DIR DISPLAY'=0, shown below.
Transistor base polarities
this signal becomes active mode with DIMRX SELECT'=1, display turned This nothing with mode ON/OFF state. this signal becomes active three times (checked every 25ms) TAPE mode with DIMRX check will start seconds seconds SKIN='L' detected after SEEK operation.
Source Select Port pins select sources shown below according modes. These outputs used select desired sound source. 0="L" 1="H"
Mode Normal RADIO TAPE RADIO TAPE RADIO TAPE RADIO TAPE RADIO TAPE AM/FM VF/ML CDOUT
standby
mode
SCAN mode Radio monitor mode
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Display Pattern
COM1 (MW2)
COM2 (MW1) colon
COM1
COM2 RMON LOUD
SANYO standard panel LCD-8162JP
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Display Examples RADIO mode frequency display mode frequency display
RADIO mode frequency display
TAPE mode 12-hour clock display
TAPE mode TAPE display
TAPE mode 24-hour clock display
TAPE mode TAPE display
mode display DIMRX `CLOCK'=1
ANTI THEFT mode factory mode entry indicaiton blinking
ANTI THEFT mode P.C. code registration blinking
ANTI THEFT mode parsonal code entry indication blinking
RADIO mode blinks when pressed.
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Description RADIO mode These keys used carry `preset memory' write read operations. Slow type (DIMRX `MEMORY TYPE'=0) keys turned within seconds, memory data that corresponds that will read. pressed continuously more than second, frequency currently displayed will written memory. type (DIMRX `MEMORY TYPE'=1) pressed, character (indicating preset channel) will flashing cycle 2Hz. This means that data written preset memory. pressed this situation within seconds, frequency currently displayed will written. other pressed HOLD (active low) signal becomes active within seconds, write status will released. TAPE mode TAPE mode, keys used TAPE keys. Through DIMRX selection, following DOUBLE FUNCTION keys becomes available. Each through their function. DOUBLE FUNCTIONs marked supported.
FUNCTION2 FUNCTION1 FUNCTION0
mode During TAPE RADIO operation under mode, keys through used tuning. Clock update with (DIMRX `MEMORY TYPE'=1) clock update performed pressing while holding down key. This function effective only when HOLD (active low) becomes inactive POWER on). These keys used update `HOUR' value. However, note that they only allow value increase. they pressed once, value will incremented (one hour). they pressed continuously more than 500ms, value will increase speed (hours) socond. These keys affect minute second data display. used, these keys should pressed synchronously with used, they should pressed synchronously with DISPLAY key. This function effective only when clock display active. TAPE mode, assigned These keys used update `minute' value. However, note that they only allow value increase. they pressed once, value will incremented they pressed continuously more than 500ms, value increased speed (minutes) second. this case, `second' value reset There will carry from minute data. used, they should pressed synchronously with used, they should used together with DISPLAY key. This function effective only when clock display active. TAPE mode, assigned Keys have following functions through DIMRX `FKEY0, manipulation.
FKEY1 FKEY0
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DOWN These keys used manual tuning. they pressed once, current frequency value decreased (DOWN) increased (UP) step. they pressed continuously more than 500ms, value will change step about 70ms. system will enter wait state about 500ms when frequency value reached band edge. mode, they used SEEK DOWN keys. These functions effective only when HOLD signal (active low) becomes inactive POWER SEEK SEEK DOWN These keys used automatic station searching. desired station searched, frequency held. SCAN pressed during seek operation, SCAN mode will activated. This means that SEEK pressed during SEEK DOWN operation, scan operation UPward direction started. SEEK DOWN pressed during SEEK operation, scan operation DOWNward direction started well. these keys pressed twice row, SEARCH mode will released. system will enter wait state about 500ms when search operation reached band edge. search speed 50ms/step 70ms/ step These functions effective only when HOLD signal (active low) becomes inactive POWER SCAN This used automatic station searching. desired station searched, frequency held seconds (AMUTE (active low)=`H'). pressed again during this 5-second period, frequency officially held. action taken during that 5-second period, system will continue search operation. SEEK DOWN pressed during scan operation, seek operation DOWNward direction will started. this pressed twice row, SCAN mode will released. system will enter wait state about 500ms search operation reached band edge. search speed 50ms/step 70ms/step This effective only when HOLD signal (active low) becomes inactive POWER BAND This used select desired frequency band. current band value will changed every time when this pressed.
This effective only when HOLD signal (active low) becomes inactive POWER This used activate mode band. used band under RADIO mode. When this pressed, `VF' display will turned VFOUT output will change `H'. this situation, signal will checked 300ms later. addition, SKIN signal (active low) will checked 250ms (750ms bands changed) later. SKIN signal active, frequency held. inactive (`H'), system will start auto search operation station, then keep frequency moment when SKIN signal (active low) becomes active. display Europe modes turned when SKIN signal (active low) becomes active. nothing with function.
Display status Output status
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SEEK keys perform following functions according modes SKIN signal (active low) levels
mode) SKIN same SEEK SEEK pressed. pressed during seek operation. mode normal station current search activated search started. operation stops station search immediately. then started. mode Same above Same above activated. mode station SEEK operation inactivated. search started. continues. pressed. pressed during seek operation. mode activated station search then started. Same above mode inactivated previous state restored.
pressed TAPE mode (with mode activated), following operations performed according SKIN DKIN (active each) signal levels
SKIN DKIN pressed TAPE mode mode frequency displayed SKIN signal SEEK operation started. SKIN='L' detected, display mode changed TAPE mode display. system goes detects DKIN='L'. system continues TAPE mode display. goes detects DKIN='L'. system starts retuning operation then checks SKIN signal (active low) M1-M6 SKIN signal becomes inactive seconds (checked every seconds) with DIMRX AUTORETUNE'=0. SKIN signal detected, system starts SEEK operation.
Operations system enters frequency display mode then starts broadcast.
mode TAPE mode mode TAPE mode
AM/FM
mode
SKIN
DKIN
AM/FM
pressed mode mode RADIO MONITOR mode, RADIO MONITOR mode released operation will then started. SKIN signal (active low) checked seconds POWER when HOLD signal (active low) changes from `L'). remains during 3-second period, retuning operation started. this case, SKIN signal (active low) M1-M6 will checked. detected, SEEK operation will started. above operations performed only HOLD signal (active low) active POWER mode released pressing BAND key. However, BAND effective TAPE mode (TAPE signal (active low)=`L'), mode RADIO MONITOR mode.
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state diagram mode shown below.
Notes RADIO MONITOR released. indicates key. mode changed from during RADIO MONITOR mode, monitor mode will released.
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PS/AMEN This used perform different functions. pressed less than seconds, (Preset Scan) mode will started. pressed more than seconds, AMEN (Auto store MEMory) mode will started. This effective only when HOLD signal (active low) becomes active POWER (Preset Scan) operation this pressed, channel number currently display will incremented sequentially. channel number displayed currently, increment will start from channel number desired station encountered, AMUTE (active low) becomes inactive five seconds. LOC/DX unconditionally. channel number display blinks cycle during operation. this pressed twice row, mode will released. mode released pressing following keys PS/AMEM SEEK SEEK DOWN SCAN DOWN POWER BAND addition, mode released when HOLD signal (active low) becomes active, TAPE mode started. Preset Scan direction determined DIMRX `FMB0, FMB1, B0-B2', shown below
AMEM operation mode Channels stored this order according intensities electric field (ADI input). [FM1, selection mode] (DIMRX `FMB0, 1'=0, band first selected, channel storage starts from FM3. channels. band first selected, channel storage starts from FM3. channels. band first selected, channel storage starts from FM3. channels. [FM1 selection mode] (DIMRX `FMB0, 1=1, band first selected, channel storage starts from FM2. channels. band first selected, channel storage starts from FM2. channels. [FM1 only selection mode] (DIMRX `FMB0, 1=0, band selected, channel storage starts from FM1. channels. selection mode] (DIMRX SELECT'=1) band selected, channel storage starts from channels. modes Place system LOCAL mode setting level `H'. Then, start channel storage from some used channel storage, change level activate mode then store channels remaining memories. None-LW mode (MW1 MW2) band first selected, channel storage starts from MW2. channels. band first selected, channel storage starts from MW2. channels. During auto store operation under band mode, will flashed cycle 1Hz. entire channel storage area used remaining preset channel area left this case, channel read then displayed. following keys used release AMEM operation. PS/AMEM POWER BAND addition, this operation mode will released when HOLD signal (active low) becomes active, TAPE mode started.
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(10) This used start mode. this mode, `CD' display turned CDOUT output goes high.
Display status Display Display Output status
When this pressed with HOLD signal (active low)='H', mode activated immediately. mode will released when HOLD signal changes from `H', then again, when POWER turned turned then turned again. This function effective when HOLD signal (active low) becomes inactive POWER However, this function effective when CDIN signal (active low) becomes active. (11) This used RADIO mode. this pressed, `LOC' display turned this situation, SEEK SCAN pressed, output goes high local search operation then started. output goes when seek scan operation released.
Display status Display Display 'Normal' output status 'Search' output status
This function effective when HOLD signal (active low) becomes inactive POWER (12) LOUD this pressed once, `LOUD' display turned LOUD output goes high. pressed again, `LOUD' display turned LOUD output goes low.
LOUD Display status LOUD Display Display Output status
This function effective when HOLD signal (active low) becomes inactive POWER (13) DISPLAY This used clock mode (DIMRX `CLOCK'=0) change display information (clock frequency, clock TAPE display, clock display). This used every operation mode when HOLD signal (active low) POWER used (DIMRX `MEMORY TYPE'=0), this used together with change clock data. This function effective when HOLD signal (active low) becomes inactive POWER ON/OFF.
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mode RADIO mode DIMRX 'PRIORITY'=0 (clock display priority mode) DISPLAY CLOCK display seconds later after DISPLAY FREQ display CLOCK display CLOCK display RADIO FREQ display RADIO PS/AMEM SEEK SEEK DOWN SCAN DOWN POWER BAND TAPE mode seconds later after DISPLAY TAPE display CLOCK display CLOCK display activation TAPE mode, TAPE display turned seconds. TAPE display mode seconds later after DISPLAY display CLOCK display CLOCK display activation mode, display turned seconds. display mode TAPE mode SKIN="L" search seconds later FREQ display TAPE display CLOCK display seconds later Note this operation mode, system finally enters CLOCK display mode. This means that TAPE running direction becomes unclear DIMRX 'DIR DISPLAY' been '0'. search FREQ display SKIN="L" seconds later after DISPLAY seconds later after DISPLAY TAPE display DISPLAY seconds later after termination FREQ display RADIO pressed clock display mode, frequency display turned within seconds. seconds later after DISPLAY FREQ display DISPLAY DIMRX 'PRIORITY'=1
DISPLAY CLOCK display
display DISPLAY
DISPLAY CLOCK display
TAPE display Note TAPE display mode FREQ display mode, TAPE running direction becomes unclear DIMRX 'DIR DISPLAY' been '0'.
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(14) RMON This used activate RADIO MONITOR mode temporarily. pressed TAPE operational mode, `RMON' display blinks cycle 1Hz. During this blink mode, RADIO frequencies received. this pressed again, RADIO MONITOR mode will released previous operational mode restored.
Display status Display Display Output status
RMON
RMON
Indicate statuses that prior activation RADIO MONITOR mode. This effective wait (standby) state under operational mode. pressed mode mode RADIO MONITOR mode, RADIO MONITOR mode released operation will then started.
SKIN DKIN pressed TAPE mode mode frequency displayed SKIN signal SEEK operation started. SKIN='L' detected, display mode changed TAPE mode display. system goes detects DKIN='L'. system continues TAPE mode display. goes detects DKIN='L'. system starts retuning operation then checks SKIN signal (active low) M1-M6 SKIN signal becomes inactive seconds (checked every seconds) with DIMRX AUTORETUNE'=0. SKIN signal detected, system starts SEEK operation.
Operations system enters frequency display then starts broadcast.
mode TAPE mode mode TAPE mode
AM/FM
mode
SKIN
DKIN
AM/FM
This function effective only when HOLD signal (active low) becomes inactive POWER (15) POWER (DIMRX `POWER SW'=1) This used control power supply with matrix. this pressed, POWER level goes high. this situation, TAPE pressed, TAPE mode will activated while mode will active (CDIN signal (active low)=`L') pressed. Power Supply Connection Examples POWER configuration (DIMRX `POWER SW'=1)
External POWER switch configuration (DIMRX `POWER SW'=0)
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Remote Control Function LC7461M-8103 application) remote control keys used perform functions main unit keys.
LOUD
assigned.
remote control mode, cannot used with keys same time. write data system storage, press first then press through keys. Keys provided exclusive under remote control mode. Keys perform only functions main unit keys HA/APS MA/NR respectively. pressed, clock update mode will activated display data will flashing. pressed again, clock update mode will released. These remote control keys effective under ANTI THEFT operation mode.
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State Diagram clock selection
Clock selection
Notes indicates key. equivalent situation where CDIN signal (active low) becomes active.
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mode clock selection
mode Clock selection
Note RADIO monitor omitted
Notes indicates key. equivalent situation where CDIN signal (active low) becomes active. turned with VF=off during RADIO MONITOR operation, RADIO MONITOR mode will released mode will then activated. detected during RADIO MONITOR operation, RADIO MONITOR mode will released broadcasting will then started. No.3673-25/33
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Timings SEEK, SCAN
Notes count tolerance
10.7MHz 10kHz 450kHz 3kHz 450kHz 0.6kHz
checked 10ms IFcount mode. Otherwise, checked 15ms.
Manual DOWN (applies modes)
auto retune retune operation will started following timings SKIN signal (active low) remains inactive (`H') more than seconds under mode.
Note preset memory search operation performed following timings
Notes detected preset memory, normal SEEK operation started. this case, carried same timing TIMING (1). No.3673-26/33
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control SEEK, SCAN, AMEN auto retune operatinos performed shown below during `LOC' display.
SKIN signal (active low) check time mode change from
Audio Mute (AMUTE active low) chattering reject time period (40ms) Audio mute leading time BEEP (50ms) data Display change processing (30ms 50ms) Audio mute trailing time BAND,
(The case where TAPE (active low)=`L', CDIN= (active low) `L', detected with signal inactive included)
DOWN
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(preset scan)
AMEM, SEEK, SCAN
auto retune
Note AMUTE signal (active low) output case where signal detected TAPE signal (active low) CDIN signal (active low) becomes active, detected. This applies (f). Note that AMUTE signal output BAND selection (a). Mode change modes changed following cases RADIO RADIO monitor on/off TAPE in/out on/off CDIN=
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(TAPE
Timings display with SKIN signal (active low) display with STEREO signal (active low) under RADIO mode mode, Timing TAPE running direction display with signal.
ALARM output mode) ALARM signal output when SKIN signal (active low) remains inactive continuously seconds. same time, SEEK operation will started. (DIMRX AUTORETUNE'=0)
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LC7232-8291
(10) HOLD mode HOLD mode means status where only clock block active state. This mode activated when HOLD signal (active low) changes from `L'. this mode, input FMIN, AMIN, HCTR, LCTR pins inhibited.
(11) BACK mode BACK mode means status where 4.5MHz X'tal oscillation circuitry inactive state POWER SAVE mode activated. This mode activated when HOLD signal (active low) changes from `L'. this mode, input FMIN, AMIN, HCTR, LCTR pins inhibited.
Initial Status
RADIO mode band (low band edge) MO/ST mono (off) TAPE mode POWER HOLD="H" LOUD RADIO monitor
Tracking Point Frequency
Area Band EUROPE JAPAN ALABIA SOUTH AFRICA EAST EUROPE 87.5 87.5 76.0 87.5 87.5 64.0 90.1 90.0 78.6 90.1 90.1 74.0 98.1 1000 1000 98.0 83.0 98.1 98.1 84.0 106.1 1400 1400 1404 1404 106.0 1404 1404 86.6 1404 106.1 1404 106.1 1404 94.0 1404 107.9 1720 1620 1620 1719 108.0 1620 1620 90.0 1629 107.9 1602 107.9 1602 104.0 1620 87.5 87.5 76.0 87.5 87.5 64.0 last channel 87.5 87.5 76.0 87.5 87.5 64.0
band edges loaded into FM2, MW2.
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LC7232-8291
Sample Application Circuit POWER SW=momentary switch. ANTI THEFT function used.
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LC7232-8291
Sample Application Circuit POWER SW=momentary switch. ANTI THEFT function used.
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LC7232-8291
Specifications SANYO products described contained herein stipulate performance, characteristics, functions described products independent state, guarantees performance, characteristics, functions described products mounted customer's products equipment. verify symptoms states that cannot evaluated independent device, customer should always evaluate test devices mounted customer's products equipment. SANYO Electric Co., Ltd. strives supply high-quality high-reliability products. However, semiconductor products fail with some probability. possible that these probabilistic failures could give rise accidents events that could endanger human lives, that could give rise smoke fire, that could cause damage other property. When designing equipment, adopt safety measures that these kinds accidents events cannot occur. Such measures include limited protective circuits error prevention circuits safe design, redundant design, structural design. event that SANYO products(including technical data,services) described contained herein controlled under applicable local export control laws regulations, such products must expor without obtaining expor license from authorities concerned accordance with above law. part this publication reproduced transmitted form means, electronic mechanical, including photocopying recording, information storage retrieval system, otherwise, without prior written permission SANYO Electric Co., Ltd. information described contained herein subject change without notice product/technology improvement, etc. When designing equipment, refer "Delivery Specification" SANYO product that intend use. Information (including circuit diagrams circuit parameters) herein example only guaranteed volume production. SANYO believes information herein accurate reliable, guarantees made implied regarding infringements intellectual property rights other rights third parties.
This catalog provides information January, 2002. Specifications information herein subject change without notice.
No.3673-33/33

LC7232-8291 1-Chip Controller Preliminary Overview LC72

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