Semiconductor MSC1208 This version: Nov. 1997 MSC1208 Previous ve

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Semiconductor MSC1208 This version: Nov. 1997 MSC1208 Previous ve

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E2C0019-27-Y5
Semiconductor MSC1208
This version: Nov. 1997 MSC1208 Previous version: Jul. 1996
23-bit Duplex Controller/Driver with Digital Dimming Keyscan Function
GENERAL DESCRIPTION
MSC1208 Bi-CMOS display driver 1/2-duty vacuum fluorescent display tube. consists 58-bit shift registers, latch circuits, 10-bit digital dimming circuit, switch matrix, keyscan circuit 2-channel, 3-contact rotary switch. With these features, MSC1208 only display frequencies audio systems used automobile applications various information, also accept keyboard entry. Thus front panel functions carried only this Since MSC1208 data parity check function self-check functions, inspection shipment failure detection easily performed. addition, since MSC1208 uses serial interfacing, only signal lines, DATA ENABLE DATA I/O, used connection with microcontroller.
FEATURES
Power supply voltage VDD=8 (Built-in 5V-regulator logic) Operating temperature range 85°C Directly drives segments IOH=-8.8mA, Max. VOH=VDD-0.8V Built-in switch matrix scan circuit 2ch, 3-contact switching Built-in digital dimming circuit with 10-bit resolution Data parity check function Self-check function (segment ON/OFF intervals about second test mode) Built-in oscillator (capacitor connected externally) Built-in power-on reset circuit Package: 42-pin plastic shrink (SDIP42-P-600-1.78) (Product name MSC1208SS) indicates code number.
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MSC1208
BLOCK DIAGRAM
SEG1 SEG23
Regulator PWMOUT DATA ENABLE DATAI/O Parity Checker Parity Generator bit56
Segment Driver
Segment Control (Grid2) Latch bit1 (Grid1)
bit47 bit46 bit58, bit56 Parity Dimming data Display data Shift Register
bit56 Timing Generator Grid Pre-driver GRID1 GRID2
10-bit Presetable Down Counter
58-bit Shift Register (26-bit
Parity Generator Rotary Direction Checker Up/down Counter
Vreg 4-bit TEST
Latch
4-bit
Latch
4-bit 4-bit Latch Latch
3-bit
Col4
Latch 3-bit Latch
Col1
Timing Generator
Detector w/debounce
With100kW pull-up resistor
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MSC1208
CONFIGURATION (TOP VIEW)
SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 ROW1 ROW2 ROW3 ROW4 COL1 COL2 COL3 COL4 COL5 COL6 COL7 DATA ENABLE DATAI/O SEG17 SEG16 SEG15 SEG14 SEG13 SEG12 SEG11 SEG10 SEG9 SEG8 SEG7 SEG6 SEG5 SEG4 SEG3 SEG2 SEG1 GRID2 GRID1 TEST
42-Pin Plastic Shrink
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MSC1208
DESCRIPTIONS
Symbol Type DATA Description Power Sypply Voltage. power supply connected. Ground. applied. Serial data input-output. Enters input mode when level signal input DATA ENABLE; enters output mode when level signal input DATA ENABLE. Serial clock input. During level clock pulse, input data DATA (display data dimming data) read, during level clock pulse, output data (key swich data) output DATA pin. Input matrix. These pins active. When these keys inactive state, these pins level through internal pull-up resistors. COL1 COL3 rotary switch COL4 COL7 push-button switch. Signal outputs scanning matrix. Normally, ROW1 ROW4 output level. scanning executed only once when transfer rotary switch contact pressing down release push-button switch detected. scanning continued rotary switch contact open state after this one-time scanning. Then, scanning stops when rotary switch contact makes connection with selective contacts. After scanning stopped, ROW1 ROW4 return level. oscillator connection. capacitor connected between this pin. Segment signal output. Inverted GRID signal output. This signal connected external grid driver (e.g., transistor) input. Input test. Since this internal pull-up resistor, leave this open pull use. When level signal input, segment outputs intervals second.
DATA ENABLE
COL1
ROW1
SEG1 GRID1,2 TEST
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MSC1208
ABSOLUTE MAXIMUM RATINGS
Parameter Power Supply Voltage Input Voltage Storage Temperature Power Dissipation Symbol TSTG Condition Ta=85°C Rating -0.3 to+20 -0.3 to+6 to+150 Unit
RECOMENDED OPERATING CONDITIONS
Parameter Power Supply Voltage Operating Temperature Input Voltage Input Voltage Input Voltage Input Voltage Oscillation Frequency DATA ENABLE Frequency DATA ENABLE Pulse Width DATA ENABLE Rise Time DATA ENABLE Fall Time Data Delay Time Input Data Valid Time Output Data Valid Time Frame Frequency Symbol VIH1 VIH2 VIL1 VIL2 fOSC tDV1 tDV2 Condition DATA ENABLE, TEST DATA DATA ENABLE, TEST DATA C=68pF Refer Fig. Refer Fig. Refer Fig. Refer Fig. Refer Fig. Refer Fig. Refer Fig. Refer Fig. Min. Typ. Max. Unit
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MSC1208
ELECTRICAL CHARACTERISTICS
Characteristics
(Ta=-40 to+85°C,VDD=8 18V) Parameter Input Voltage Input Voltage Input Voltage Input Voltage Input Current Input Current Input Current Input Current Output Voltage Output Voltage Output Voltage Symbol VIH1 VIH2 VIL1 VIL2 IIH1 IIH2 IIL1 IIL2 VOH1 VOH2 VOL1 Condition DATA ENABLE, TEST DATA DATA ENABLE, TEST DATA VIN=5V, DATA ENABLE, DATA VIN=5V, COL1 TEST VIN=0V, DATA ENABLE, DATA VIN=0V,COL1 TEST IOH1=-3mA, SEG1 VDD=13.8V IOH2=-8mA, SEG18 VDD=13.8V VDD=13.8V, pins IOL=500mA IOL=200mA IOL=2mA VDD=13.8V, IOL=10mA, GRID1,2 VDD=13.8V, IOL=200mA, ROW1 VDD=13.8V, IOL=2mA, DATA fosc=512kHz, Load Min. Max. -160 Unit
Output Voltage Output Voltage Output Voltage Current Consumption
VOL2 VOL3 VOL4
Characteristics
(Ta=-40 to+85°C, VDD=8 18V) Parameter DATA ENABLE Frequency DATA ENABLE Pulse Width DATA ENABLE Rise Time DATA ENABLE Fall Time Data Delay Time Input Data Valid Time Output Data Valid Time Output Data Active-to-High-Impedance Time Output Through Rate (SEG, GRID) DATA ENABLE Setup Time Oscillation Frequency Symbol tDV1 tDV2 fOSC Condition Refer Fig. Refer Fig. Refer Fig. Refer Fig. Refer Fig. Refer Fig. Refer Fig. Refer Fig. CL=100pF, t=20 Refer Fig. C=68pF Min. Max. Unit
Scan Characteristics
Parameter Scan Time Scan Width Symbol Condition Refer Fig. Refer Fig. Min. Typ. 62.5 Max. Unit
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MSC1208
TIMING DIAGRAM
DATA ENABLE tDV1 DATA (INPUT) Hi-z Hi-z tDV2 DATA (OUTPUT) Hi-z VALID Hi-z
VALID
VALID
Figure Data Input-Output Timing
DATA ENABLE
Figure Power-ON Reset Timing
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Frame 2048-bit time (250Hz typ.) GRID1 8-bit time GRID2 1016-bit time max. 3-bit time
MSC1208
SEG1-23 1019-bit time max. 5-bit time
Figure GRID Output Timing Note: Shown above timing when duty ratio digital dimming 1016/1024. grid segment time 10-bit digital dimming data. 1-bit time=TOSC(=1/fOSC)=1.95 typ.
Scan Time ROW1 Scan pulse width ROW2
ROW3
ROW4
Figure Scan Timing
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MSC1208
FUNCTIONAL DESCRIPTION
Scan case push-button switch, scanning started only when depression release detected purpose minimizing noise caused scanning signal. Then, after completion 1-cycle scanning, outputs return level. push-button switch input pins (COL4-COL7) connected chattering absorption circuit that absorbs chattering with chattering time about 25ms (typ.), input signals shorter than 25ms ignored. Because this, scanning started about 25ms after input. case rotary switch, scanning started only once when transfer rotary switch contact pressing down release push-button switch detected. scanning continued rotary switch contact open state after this one-time scanning. Then, scanning stops when rotary switch contact makes connection with selective contacts. After that, outputs return level. rotary switch input pins (COL1-COL3) have internal chattering absorption circuit that absorbs chattering with chattering time about (typ.), input signals shorter than ignored. Because this, scanning started about after change switch status. switch data stored internal latch circuit, then transferred output register rising edge first pulse DATA ENABLE. switch data consists 16-push button switch data (S1-S16) 2-rotary switch data (RS1 RS2). rotary switch data consists bits contact-transfer count 1-bit rotating direction. Since maximum transfer count "111" binary, transfer counted seven times. rotating direction regular direction opposite direction. [Rotating direction] Regular direction Opposite direction (See figure below)
ROW1 ROW2 ROW3 ROW4 COL1 COL2 COL3 COL4 COL5 COL6 COL7
Figure Matrix
COL1 ROW1 COL2 COL3
Figure Rotary Switch Section (RS1) 9/14
Semiconductor Digital Dimming
MSC1208
segment grid time controlled range 0/1024 (=0%) 1016/1024 (=99.2%) duty 10-bit digital dimming data. (See Figure "SEG GRID Output Timing.") Data Transfer input data (display data dimming data) from DATA read into internal register after DATA ENABLE input level changes from "H". output data (key switch data) output DATA after DATA ENABLE input level changes from "L". Using this method, bidirectional serial communication using signal lines, DATA ENABLE DATA I/O, made. transfer data consists bits including 2-bit parity bit. Data transfer completed parity error occurs after 58-bit data been transferred internal register. parity error occurs, previously transferred data (display data dimming data) remained. abnormality occurs DATA ENABLE line signal pulse input 10ms ±5ms more, data transfer terminated even progress. Then, when next pulse input, identified first pulse. Diagnositc Function Parity input data used parity check. output data, parity internally generated parity bits parity value both input output, "P0, P1=1, when total number "1"s "0"s) even, "P0, P1=0, when odd. Default mode This device enters default mode pulse input DATA ENABLE about second parity error keeps occurring about second. this mode, state keeping contents dimming data before entering default mode, segment outputs (SEG1, SEG2) only This state reset parity error detected after data been transferred. Self test When TEST level, segment outputs intervals about second. this time, duty ratio both segment grid outputs becomes maximum (99.2%). Power-On Reset When power turned this device initialized internal power-on reset circuit. Then, about 1second after initialization, device enters default mode. this time, SEG1 SEG2 segments with maximum duty ratio (99.2%). This state reset parity error detected after data been transferred.
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Semiconductor Input-Output Configuration Input data bits)
DATA PARITY First
MSC1208
Dimming DATA
Display DATA
[Correspondence between input data (Display data) SEG, GRID]
Display DATA GRID SEG1 SEG23 GRID1 SEG1 SEG23 GRID2
[Correspondence between dimming data duty]
Dimming DATA (LSB) (MSB) 0000000000 0001111111 1111111111 Duty 99.2
dimming data greater than equal 0001111111, duty 99.2%. (LSB) (MSB)
[Parity] When total number "1"s "0"s display data dimming data even, "P0, P1=1, input data, when odd, "P0, P1=0, Output data bits)
DATA First
ALL"1" ALL"1" PARITY DATA SWITCHES DATA
[Direction (Rotary switch rotating direction)] D2=Regular direction: Opposite direction: [Contact transfer count (rotary switch)] Q11(LSB) 13(MSB), Q21(LSB) 23(MSB) [Push-butter switch] S16=Pressing switch down: Release: [Parity] When total number "1"s "0"s switch data even, "P0, P1=1, added output, when odd, "P0, P1=0, added. Note: output every from 11/14
MSC1208
APPLICATION CIRCUITS
Example Basic Application Circuit
*(Note)
Microcomputer DATA DATA ENABLE
GRID1
MSC1208 TEST GRID2
SEG1
SEG23
1/2-duty display tube
Note: Connect diode between rotary switch common contact selective contacts, shown diagram above.
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Semiconductor Example Using Single Rotary Switch
(Note)
MSC1208
Microcomputer DATA DATA ENABLE
GRID1
MSC1208 TEST GRID2
SEG1
SEG23
1/2-duty display Tube
Note: When using sigle rotary switch, connect that used (ROW1 ROW2) COL1 COL3 diode. rotary switch used, connect ROW1 COL1 COL3 diode, also connect ROW2 COL1 COL3 diode.
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MSC1208
PACKAGE DIMENSIONS
(Unit
SDIP42-P-600-1.78
Package material Lead frame material treatment Solder plate thickness Package weight
Epoxy resin alloy Solder plating more 4.52 TYP.
Notes Mounting Surface Mount Type Package SOP, QFP, TSOP, SOJ, (PLCC), surface mount type packages, which very susceptible heat reflow mounting humidity absorbed storage. Therefore, before perform reflow mounting, contact Oki's responsible sales person product name, package name, number, package code desired mounting conditions (reflow method, temperature times).
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Semiconductor MSC1208 This version: Nov. 1997 MSC1208 Previous ve

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