LC737212, LC737212M Telephone Dialer with On-Chip Memory PushButt
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Ordering number EN5203203
LC737212, LC737212M
Telephone Dialer with On-Chip Memory PushButton Telephones
Overview
LC737212 LC737212M CMOS telephone dialers pushbutton telephones. They support both DTMF pulse dialing. These products include 16-digit memories storing telephone numbers 63-digit memory redialing, they provide, single chip, functions required dialing control standard independent telephone, including on-hook dialing hold function. They also provide serial interface connection microcontroller.
Functions
Fabrication CMOS process that allows these circuits directly operated from telephone line Support single-contact keypads Built-in oscillator circuit (fosc 3.58 MHz) that drive either standard color-TV crystal oscillator element ceramic resonator High-precision DTMF signal Frequency generator circuit (±0.1%) adopted eased ceramic resonator selection Five one-touch 16-digit auto-dial memories quick-dialing memories On-hook off-hook specified memory entries. Mode change pause data items stored dialing memories. 63-digit redial memory Automatic pause (3.9 seconds) insertion when mode switched.
Automatic pause (1.0 second) insertion after flash operation. Mode changing one-directional, from pulse mode tone mode. Output press tone (1036 keys other than DTMF keys when input valid Output operation complete confirmation tone (2072 each telephone number) when telephone number stored memory Generates signal types DTMF mode. Supports on-hook dialing mode. Supports hold function with hold mode. Supports both dialing pulse rates. mode switched from either input. Settable dialing pulse circuit closed ratio (make percent): either 39%. Supports either keypad serial input. Provides serial output keypad input data internal status. Capable controlling serial output timing. Supports user-defined keys. Wide operating power-supply voltage range Pulse mode: DTMF mode: power operation Pulse mode: (VDD DTMF mode: (VDD standby current (VDD
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
21398RM(OT) 5203-1/27
LC737212, 737212M
Package Dimensions
unit: 3170-DIP36S
[LC737212]
unit: 3129-MFP36SD
[LC737212M]
SANYO: DIP36S
SANYO: MFP36SD
Specifications
Absolute Maximum Ratings 25°C
Parameter Maximum power supply voltage Maximum input voltage Maximum output voltage Allowable power dissipation Minimum load resistance Operating temperature Storage temperature Symbol VOUT Topr Tstg Between DTMF pins Conditions Ratings -0.3 +6.5 -0.3 +0.3 -0.3 +0.3 +125 Unit
Allowable Operating Ranges 25°C
Parameter Supply voltage Input high-level voltage Input low-level voltage contact resistance Keypad capacitance Oscillator element rating Symbol VDDP VDDT Center frequency 3.579545 -1.3 Pulse mode DTMF mode input pins input pins Conditions +1.3 Unit
5203-2/27
LC737212, 737212M Electrical Characteristics 25°C, fosc 3.579545
Parameter Operating current drain Static current drain Memory retention voltage Memory retention current Symbol IDDP IDDT IDD(ST) IIH1 Input current IIL1 IILK1 current IILK2 IOLK1 IOLK2 Output leakage current IOFF VOH1 VOH2 Output voltage VOL1 VOL2 Conditions Pulse output mode, outputs open, DTMF output mode,outputs open, Standby mode, outputs open, Between SOUT-ENA, OFF-HOOK, DPR, P/T, BMR, ON-HOOK-DIAL HOLD-OFF DISCON SI/KEY, OFF/ON-HOOK, STORE pins, SOUT-ENA, OFF-HOOK, DPR, P/T, BMR, ON-HOOK-DIAL HOLD-OFF DISCON SI/KEY, OFF/ON-HOOK, STORE pins, pins, VILK pins, VILK pins, VOLK pins, VOLK VDD, with output off, MUTE1, MUTE2, S-OUT pins. K-TONE, HOLD-OUT, HOOK-CTL, SP-CTL pins, -250 K-TONE, HOLD-OUT, HOOK-CTL, SP-CTL pins, K-TONE, MUTE1, MUTE2, SP-CTL, HOLD-OUT, HOOK-CTL pins, K-TONE, MUTE1, MUTE2, SP-CTL, HOLD-OUT, HOOK-CTL pins, Unit
-300
Characteristics 25°C, fosc 3.579545
Parameter debounce time chatter exclusion time scan frequency tone frequency tone output time Symbol TPCHT fKSC Pulse mode Auto-pause time TMFON TMFOFF THKP fKST TKSTON dBCR TSTART 3.0V Pulse mode DTMF mode DTMF output time DTMF interdigit pause time Hooking time Hooking pause time Memory store confirmation tone frequency Memory store confirmation tone output time tone amplitude Tone output ratio Tone output distortion Oscillator start time 3.88 3.88 3.88 0.98 OFF-HOOK, P/T, ON-HOOK-DIAL, HOLD Conditions 258.9 1035.7 30.9 2071.4 3.93 3.93 3.93 1.02 Unit
278.1
mVrms
5203-3/27
LC737212, 737212M Pulse Dialing Output/fosc 3.579545
Dialing pulse rate 9.94 19.89 9.94 19.89 Interdigit pause 834.2 525.2 834.2 525.2 Make percent 33.2% 33.2% 39.2% 39.2%
DTMF Output/fosc 3.579545
Input Output frequency [Hz] Standard 1209 1336 1477 1633 LC737212 697.0 770.1 852.3 942.0 1209.3 1335.7 1476.7 1633.0 Deviation +0.01 -0.02 -0.03 -0.11 -0.03 +0.03 +0.02 +0.00
Assignment
view
5203-4/27
LC737212, 737212M Block Diagram
5203-5/27
LC737212, 737212M Keypad Layout
HOLD ON/OFF STORE
Matrix Functions (when SOUT-ENA high) Digits R/P: HOLD ON/OFF: STORE: Dialing data DTMF dialing data pulse mode, switches LC737212/M DTMF mode. Flash (0.71 second) Quick-dialing address specification (only on-hook state, sets memory store mode) Redial, pause (3.9 seconds), clear paused state Controls on/off state hold mode Sets memory store mode. One-touch dialing Definable function keys
keypad formed matrix using input pins supports keys. given input shorting grounding column that key. prevent discharge backup battery inadvertent presses standby mode (when circuit disconnected from telephone line), input shorting accepted. This means that on-hook storing telephone numbers memory selected, application must implement STORE key) input grounding COLUMN pin. Digit keys Dialing data keys Quick-dialing memory address specification keys keys DTMF mode: keys function dial data keys Pulse mode: Pulse/tone switching Unused. (flash key) Invokes operation equivalent 0.71-second hooking implemented turning output 0.71 second. Although 1-second pause automatically inserted, following dialing data entered during that period. Redialing possible after flash operation. (memory key) When on-hook memory registration system switches from standby mode memory registration mode when pressed. address dialing memory specified combination digit keys that pressed immediately after key. system operates follows when memory address operation performed incorrectly.
5203-6/27
LC737212, 737212M Memory readout
Memory store
After connecting line, functions redial long system performed dialing output operation. manual dialing mode, functions pause data key. When dialing from memory: During pause operation: Cancels pause While dialing: Inserts pause During redial operation: During pause operation: Cancels pause While dialing: Ignored more pause characters occur data, pause cancel operation will cancel pending pauses single operation. STORE Pressing STORE sets system memory store mode. Pressing STORE again during memory store operation cancels input data. HOLD ON/OFF Controls on/off state off-hook mode. tone output this time. Keys These one-touch auto-dialing keys. Pressing these keys outputs corresponding memory data from DTMF pins. Keys These user-defined keys. When these keys pressed, LC737212/M outputs corresponding status code from serial interface.
5203-7/27
LC737212, 737212M Functions
Symbol SOUT-ENA HOLD-OFF ON-HOOK DIAL SI/KEY ON-HOOK XOUT OFF/ON-HOOK STORE SP-CTL DTMF MUTE2 MUTE1 S-OUT K-TONE HOOK-CTL HOLD-OUT DISCON Column inputs Speaker reception control output; complementary output DTMF output; emitter-follower output DTMF mute output; n-channel open drain output K-TONE muting output; n-channel open drain output Serial data output; n-channel open drain output Dialing pulse output; n-channel open drain output K-tone output; complementary output Hook control output; complementary output Hold mode output; complementary output Disconnect input Serial output enable, enable, disable Hold mode clear input; falling edge detection. On-hook dialing input; falling edge detection Serial input/keypad input switching Hook-switching input Dialing pulse rate switching; pps, Pulse/tone switching; H:pulse, tone Make percentage switching input; 33%, Oscillator circuit. Connect either crystal ceramic oscillator element with frequency 3.58 between these pins. Off-hook store/on-hook store switching Power supply input Column input Function
5203-8/27
LC737212, 737212M SOUT-ENA Normaly high. Serial output Dial output enabled when this high. HOLD Hold mode cleared when falling edge detected this pin. HOLD-OFF inputs accepted seconds immediately following transition on-hook hold mode. ON-HOOK-DIAL This toggles on/off state each input falling edge. When telephone hook, this toggles on/off state on-hook dialing mode. When telephone hook, this toggles on/off state monitor mode. SI/KEY keypad input mode when this low. When this high, serial input enabled. this state, keypad inputs pulled built-in resistors, pins function serial interface input pins. serial clock input serial data input strobe input OFF-HOOK This hook state switching input. This dialing pulse rate switching input. pps, pps) This dialing signal switching input. pulse, DTMF) This only switch from pulse DTMF. This allows mixed-mode dialing, i.e. switching modes during dialing. DISCON Setting this switches LC737212/M power mode forcibly stops oscillator circuit. outputs turned power mode. (The n-channel open-drain outputs high-impedance state, complementary outputs low.) internal states LC737212/M reset when this goes high.
Off-hook input On-hook Dial input Status STANDBY ON-HOOK DIAL OFF-HOOK DIAL MONITOR
recommend setting DISCON when power first applied, setting high after power-supply voltage (VDD) reached exceeded volts.
This sets break/make ratio dialing pulse output. 33.2%, 39.2%) OFF/ON-HOOK STORE This switches memory storing mode. Off-hook store (Memory stored with telephone line connected.) On-hook store (Memory stored with telephone line disconnected.)
5203-9/27
LC737212, 737212M SP-CTL This provides speaker reception control output. This output during on-hook dialing, monitor, hold states. This complementary output. DTMF DTMF output pin. This emitter-follower output. MUTE2 DTMF muting output. This output turned synchronization with DTMF output. This n-channel open-drain output. wired with MUTE1 output taken. MUTE1 K-TONE muting output. This output turned synchronization with dialing pulse K-TONE outputs. This n-channel open-drain output. wired with MUTE2 output taken. S-OUT serial data output. This used output internal status LC737212/M keypad data. This n-channel open-drain output. dialing pulse output. This n-channel open-drain output. K-TONE This outputs input confirmation tone (1036 memory store confirmation tone (2073 ms). This complementary output. HOOK-CTL circuit control output. high level output when circuit connected. This complementary output. HOLD-OUT hold control output. high level output during hold. This complementary output. XOUT oscillator connection pins. Connect 3.579545-MHz oscillator element. other external components required crystal oscillator element with built-in feedback resistor capacitor components used. 30-pF capacitors required ceramic resonator used. keypad connections. power supply connections.
5203-10/27
LC737212, 737212M Internal Circuit
Internal equivalent circuit
SOUT-ENA HOLDOFF ON-HOOKDIAL SI/KEY OFF-HOOK OF/ON-HOOK STORE DISCON
XOUT
MUTE2 MUTE1 S-OUT
SP-CTL K-TINE HOOK-CTL HOLD-OUT
DTMF
5203-11/27
LC737212, 737212M Operations hook input Pulse output
Item
hook Tone output
Input
Dialing Output
Normal dialing (pulse mode)
Normal dialing using (pulse mode)
Normal Normal dialing redialing (pulse mode) Redialing
Using keys Normal dialing including mode changes (pulse mode start operation) Using switch
(P/T),
Store (pulse mode) Quick dialing Readout Memory store readout Store (tone mode) One-touch dialing Readout
Timing Charts Pulse dialing
5203-12/27
LC737212, 737212M DTMF dialing
Flash operation
Pulse/tone mixed dialing
After pulse dialing (including IDP) completed, when DTMF input operations performed, DTMF signals output continuously while keys pressed.
5203-13/27
LC737212, 737212M Pulse/Tone Mixed Dialing (using automatic pausing)
DTMF operation performed during dialing pulse output (including IDP), K-TONE signal will output continuously while keys pressed. Then, after pulse dialing completes, LC737212/M will pause seconds then output DTMF signals.
5203-14/27
LC737212, 737212M LC737212 LC737212M Operating Specifications Internal Status LC737212 LC737212M have internal states. Table presents functional overview these states. individual status bits have following interpretations. SP-CTL output HOOK-SW information Memory store Hold (the HOLDOUT output) Dialing allowed. However, note that during standby acquisition, have above meanings. Table.1 State Table
State HOOK-SW Function HOOKCTL Standby Standby with acquisition Off-hook dialing Off-hook dialing with acquisition On-hook dialing On-hook dialing with acquisition Monitor Monitor with acquisition input shorting pins disabled. Keypad input enabled. Only keypad data output through serial interface. Off-hook dialing mode Only keypad data output through serial interface. Data written redial memory. On-hook dialing mode Only keypad data output through serial interface. Data written redial memory. Monitor mode Only keypad data output through serial interface. Data written redial memory. SPCTL HOLDOUT Dialing output Disabled Disabled Disabled Disabled Enabled Disabled Enabled Disabled Status bits 01000 01110 00001 00000 11001 11000 10001 10000 Switched from monitor mode. Switched from offhook dialing mode. Switched from onhook hold mode. Switched from standby mode. Switched from offhook dialing mode. Switched from offhook dialing mode. Switched from monitor mode. Switched from offhook dialing mode. Switched from offhook dialing mode. Switched from standby mode. Notes
Off-hook hold
Hold mode
Disabled
10010
On-hook hold
Hold mode
Disabled
11010
On-hook store
Memory store more (circuit disconnected)
Disabled
01100
Off-hook store
Memory store more (circuit connected)
Disabled
00100
Off-hook dialing store
Memory store more (circuit connected)
Disabled
11100
Monitor store
Memory store more (circuit connected)
Disabled
10100
Dialing Output Specifications Dialing output possible off-hook dialing, on-hook dialing, monitor modes. output pulse make percentage pulse mode specified 33.2 39.3% with pin. output pulse rate pulse mode with pin. LC737212 generate DTMF dialing signals DTMF mode. serial input used, generate DTMF dialing signals.) DTMF signals output continuously long corresponding held down. LC737212 guarantees minimum DTMF output time about also guarantees minimum about mode changed (with key) during pulse dialing operation then DTMF data keyed system automatically inserts second pause after completing pulse dialing sequence then outputs DTMF signals.
5203-15/27
LC737212, 737212M mode changed after pulse dialing operation DTMF data keyed system does automatically insert pause, rather outputs DTMF data keyed pause (the used second later digit) used enter pause data. pause data mode change data (MC) entered consecutively, system pauses seconds. After connecting line, first time pressed, system will redial previously entered dialing data. Memory Output Specifications LC737212/M provides five 16-digit memory locations touch dialing memory, 16-digit memory locations quick-dialing memory, 16-digit buffer memory store operations, 63-digit redialing memory. single digit memory hold single dialing data item single mode change data item (MC), single pause data item (P). memory LC737212/M includes 63-digit buffer memory that also functions redial memory, thus called memory. keyed input data stored sequentially memory. Dialing data stored memory read specified dialing rate output from DTMF pin. Dialing numbers that exceed digits possible. system writes data that exceeds digits starting beginning (location memory outputs that data. However, this means that redialing numbers that exceed digits possible since dialing data correctly retained memory. Dialing memory (one-touch dialing quick dialing) LC737212 provides five locations one-touch dialing, locations (M00 M19) quick dialing. Each these dialing memory locations holds digits dialing data plus output format (pulse DTMF) start data. When dialing memory location accessed, content copied memory then LC737212/M dials that number reading memory. number stored DTMF dialing memory read after pulse dialing operation, mode change (MC) data item automatically inserted memory. After DTMF signal output, data registered pulse data read from dialing memory, that data will output DTMF signals. Data store buffer memory This memory used when storing number dialing memory. Off-Hook Hold On-Hook Hold Modes Pressing HOLD switches between off-hook dialing mode hold (off-hook hold mode). hold mode, HOLD-OUT SP-CTL outputs turned Dialing disabled hold mode. possible hold during dialing. Placing phone hook switches system from off-hook hold mode on-hook hold mode. Lifting receiver switches system from on-hook hold mode off-hook hold mode. Hold cleared falling edge HOLD-OFF pin. This switches from off-hook hold mode on-hook dialing mode. This also switches from on-hook hold mode standby mode. After switching off-hook hold mode, falling edges HOLD-OFF detected second. On-Hook Dialing Falling edges ON-HOOK DIAL input switches system between standby mode on-hook dialing mode. on-hook dialing mode, HOOK-CTL SP-CTL pins output high levels. possible hold when system on-hook dialing mode. Lifting receiver switches system off-hook dialing mode.
5203-16/27
LC737212, 737212M Monitor Mode Falling edges ON-HOOK DIAL input switches system between off-hook dialing mode monitor mode. monitor mode, HOOK-CTL SP-CTL pins output high levels. possible hold when system monitor on-hook dialing mode. Memory Store Function On-hook (with line disconnected) off-hook (with line connected, including on-hook dialing monitor modes) storing selected. On/OFF-HOOK store used this selection. Data stored memory store mode. following sequences switch system store mode. On-hook (disconnected from line) Pressing either STORE Off-hook (connected line) Pressing STORE Data written memory store buffer memory digits) keying that dialing data. confirmation tones (1036 output from K-TONE during this operation. Keyed data corresponding seventeenth later digit ignored confirmation tone output those digits. Specifying memory address copies contents memory store buffer memory specified address completes memory store operation. memory store confirmation tone (2072 output from KTONE this point. data given address deleted switching store mode then specifying address without entering dialing data. Acquisition Modes these modes, LC737212/M simply accepts input transmits corresponding code status over serial interface. Data from keypad written memory dialing performed. Standby acquisition mode Pressing when SI/KEY low, entering code value when SI/KEY high, switches LC737212/M between standby mode standby acquisition mode. only on-hook memory storing selected, pressing STORE will switch system on-hook store mode. Off-hook acquisition mode, on-hook dialing acquisition mode, monitor acquisition mode modes that allow dial output, entering code value over serial interface will switch LC737212/M corresponding acquisition mode. Even LC737212/M acquisition mode, dialing data entered over serial interface will dialed. Serial Output During input when system's internal mode change, LC737212/M outputs corresponding status data from S-OUT pin. Values expressed length period n-channel open-drain output state, data grouped 4-bit units output. inter-bit interval Interval between 4-bit groups 1440 memory content readout mode only, 4-bit group interval 1520 µs.) During Input This data consists bits, starting with (always that indicates that this data input data. next bits dialing related data, then next bits indicated LC737212/M internal status, finally, last bits indicate data. data presses that were longer than (the bounce (chatter) exclusion time) output. (For example, data presses when system hold mode dialed, output from S-OUT data.) Placing receiver on-hook switches system
5203-17/27
LC737212, 737212M
Timing chart Assuming
pressed normal mode.
Indicates that this input. Always Indicates data write type. Pulse DTMF Indicates dialing output. Output progress output done Upper internal status
Lower four bits internal status.
code
code
5203-18/27
LC737212, 737212M Codes
CODE
HOLD
STORE
5203-19/27
LC737212, 737212M Codes
CODE
Mode change (when internal state changes) Here data consists eight bits, (which always used differentiate this data from data, seven bits expressing mode change. This data output when internal state changes, changes, when dialing completes. expresses state pin. pules, DTMF following cases, status output even changes state. standby mode, off-hook hold mode, on-hook hold mode. After tone data (including written memory. When memory location that does have data stored accessed: dialing: status when dialing completed output serial data. dialing: serial output operation performed. redial operation attempted when redial disabled (when last number dialed exceeded digits) status when dialing completed output serial data. Timing Chart From standby state hook, then off-hook dialing With switch
state
5203-20/27
LC737212, 737212M Serial Input following control performed using serial input. Keypad input replacement (except user-defined keys) Setting status bits (e.g., setting on-hook dialing mode on/off) Reading content dialing memory Setting output port on/off states (including DTMF signal output) Serial input format SI/KEY input high. This causes keypad inputs pulled pins function serial input pins internal shift register. Clock input Data input Strobe input Data written falling edge clock input period when strobe input equivalent period when keypad pressed. data consists bits. Codes other than codes defined keypad keys defined input data codes serial input. This allows controls other than controls input serially.
5203-21/27
LC737212, 737212M Serial Input Code Table
Serial code (HEX) RDINH STORE OHD-ON HOLD same function one-touch dialing Cancels memory store operation progress. Otherwise identical key. Undefined Identical key. Cancels redial pause operations. Identical key. Clears memories. This function enabled memory store mode. Identical HOLD key. Undefined Identical STORE key. On-hook dial monitor mode setting (OHD-ON) Undefined Disables redial. same functions one-touch dialing keys Serial readout redial memory digits digits Digits digits Undefined Serial readout quick-dialing memory locations Serial readout buffer memory used storing memory Serial readout one-touch memory locations Serial readout quick-dialing memory locations Command Function operation
acquisition mode on/off setting Undefined same function one-touch dialing key.
Continued next page. 5203-22/27
LC737212, 737212M
Continued from preceding page.
Serial Code (HEX) LCHN LVSS P1/DFIN Identical dial data keys Illegal value Pause data Undefined Illegal value Undefined Illegal pulse mode. Dialing data when tone mode. Identical dial data "*". Identical dial data "#". Illegal pulse mode. Pause data when tone mode. Undefined Illegal value Undefined Converts input data from pulse DTMF. Illegal tone mode. Undefined Undefined Undefined Outputs DTMF signal Outputs DTMF signal Outputs DTMF signal Outputs DTMF signal Outputs DTMF signal Outputs DTMF signal Outputs DTMF signal Outputs DTMF signal Outputs DTMF signal Left channel output Left channel ground. Normally Outputs DTMF signal Outputs DTMF signal Outputs DTMF signal Outputs DTMF signal Outputs DTMF signal Sets S-OUT output Sets S-OUT output Sets HOLD output Sets HOLD output Sets HK-CTL output Identical dial data keys DISCON
Command DTMF output Initial settings (DISCON) Undefined Identical key. Undefined Undefined
Function operation
Continued next page. 5203-23/27
LC737212, 737212M
Continued from preceding page.
Serial code (HEX)
Command Sets HK-CTL output
Function operation
Turns K-TONE 2-kHz frequency Turns K-TONE 1-kHz frequency Sets SP-CTL output Sets SP-CTL output Sets MUTE2 output Sets MUTE2 output Sets MUTE1 output Sets MUTE1 output Sets output Sets output
SREQ Reads status data serially (SREQ) Note: undefined command codes ignored.
Functions unique serial input commands When SI/KEY high, inputting code values serially causes contents corresponding dialing memory output from S-OUT pin. data grouped into four-bit groups output. After first outputting output format (pulse 1111, DTMF 1110), LC737212/M outputs dial data. data value 0000 indicates that output completed. item concerning serial output page details output format data from S-OUT pin. memory data digits) read digits time four operations. When redial memory disabled, attempts read memory (1C) serially will result output either Data dialing memory represented shown table.
Dialing Data
Representation 0001 0010 0011 0100 0101 0110 0111 1000
Dialing Data Pause Data
Representation 1001 1010 1011 1100 1101 1110
Switching Output Ports When SI/KEY high, inputting following code values serially sets corresponding output port off. Since these commands directly write output port data latch, they change internal status, memory other aspects. S-OUT (E1) (E0) HOLD (E3) (E2) HK-CTL (E5) (E4) K-TONE (E7) (E6) SP-CTL (E9) (E8) MUTE2 (EB) (EA) MUTE1 (ED) (EC) (EF) (EE)
5203-24/27
LC737212, 737212M When K-TONE output turned MUTE1 output will operate synchronization with K-TONE output. When HK-CTL output turned inputs shorting pins column pins will accepted. When SI/KEY high, inputting following code values serially turn DTMF output off. DTMF output (D1) (D0) (D3) (D2) (D5) (D4) (D7) (D6) (D9) (D8) (DB) (DA) (DD) (DC) (DF) (DE) DTMF output (4E) Other Serial Input Codes SREQ These commands output IC's internal status from SOUT pin. status items valid. Turns acquisition mode off. (CLR) Inputting code memory store mode erases stored dialing data. (OHD-ON) Inputting OHD-ON code standby mode switches system on-hook dialing mode. Input DISCON code (4F) return standby mode. (pause) This command corresponds 3.9-second pause data. (MC) Changes dialing data input mode plug from pulse tone. This represented 1110 memory. This ignored written memory dialing data input mode tone mode. Note that codes marked undefined serial code table ignored. Notes serial input usage SI/KEY switched from high then again while pressed, LC737212/M will receive presses that key.
TCLKD (The first SCLK input after SI/KEY goes from high) LC737212/M monitors SOUT output after SI/KEY goes high, there serial output press after longer elapsed, then enables SCLK input. other cases, longer required. will reliably output status data from SOUT status request command (FF) code command mode other than hold memory store mode input. this output does appear over cases other than serial readout from memory), itself have caused some sort error. such cases, must re-initialized using DISCON pin. recommend always re-initializing with DISCON when receiving standby status. this time, will once again output standby status data.)
5203-25/27
LC737212, 737212M Status Diagram Basic functions
acquisition mode
5203-26/27
LC737212, 737212M During Store Operations
Off/On-HOOK STORE
Off/On-HOOK STORE
products described contained herein intended surgical implants, life-support systems, aerospace equipment, nuclear power control systems, vehicles, disaster/crime-prevention equipment like, failure which directly indirectly cause injury, death property loss. Anyone purchasing products described contained herein above-mentioned shall: Accept full responsibility indemnify defend SANYO ELECTRIC CO., LTD., affiliates, subsidiaries distributors their officers employees, jointly severally, against claims litigation damages, cost expenses associated with such use: impose responsibility fault negligence which cited such claim litigation SANYO ELECTRIC CO., LTD., affiliates, subsidiaries distributors their officers employees jointly severally. 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 February, 1998. Specifications information herein subject change without notice. 5203-27/27
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