Document
E2C0027-27-Y2
¡ Semiconductor MSC1951-01
¡ Semiconductor
This version: Nov. 1997 MSC1951-01 Previous version: Jul. 1996
7-Segment ¥ 16-Digit or 16-Segment ¥ 6-Bargraph display Controller/Driver
GENERAL DESCRIPTION
MSC1951-01 is a Bi-CMOS bargraph and alphanumeric display controller designed to interface with either vacuum fluorescent display. MSC1951-01 can drive displays with up to 16 figures with either 16 segment bargraph or sevensegment type code plus a decimal point and comma tail.
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MSC1951-01 adopts a serial interface system, which allows data transfer from the microcomputer only by two signal lines of SCLK and DATA.
FEATURES
• Can display up to 16 digits of 7-segment type character with comma/point or of 16-segment type bargraph. • The number of display digits is programmable within 16. • The brightness adjustment is programmable by 1/32 step. • The display contents can be changed at any digit. • Buit-in PLA can display alphanumeric characters, e.g., 0 to 9 A, C, E, F, P, L (capital letters), b, and d (small letters). In addition, 16-segment dot display and bar display are allowed. • Instruction is executed by one byte. • Driver output Current : –20 mA max. (Digit) –10 mA (Segment), Plastic DIP –05 mA (Segment), Plastic QFP Withstand voltage : 58 V max. • Can be used for LED. • Pin compatible with 10951 manufactured by Rockwell. • Power supply voltage : 5V ± 10% • Package options: 40-pin plastic DIP (DIP40-P-600-2.54) (Product name : MSC1951-01RS) 44-pin plastic QFP (QFP44-P-910-0.80-K) (Product name : MSC1951-01GS-K)
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BLOCK DIAGRAM
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DATA SCLK
TIMING AND CONTROL
6¥16 DISPLAY DATA BUFFER
64¥16 PLA
SEGMENT DECODER
POR VSS VDD A
2¥16 DECIMAL PT. COMMA TAIL
SEGMENT DRIVERS (ANODE)
DIGIT DRIVERS (GRID)
SGA SGB SGC SGD SGE SGF SGG SGH SGI SGJ SGK SGL SGM SGN SGO SGP PNT TAIL
AD16 AD15 AD14 AD13 AD12 AD11 AD10 AD 9 AD 8 AD 7 AD 6 AD 5 AD 4 AD 3 AD 2 AD 1
MSC1951-01
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MSC1951-01
INPUT AND OUTPUT CONFIGURATION
• Schematic Diagrams of Logic Portion Input Circuit
VSS VSS
INPUT
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VDD
VDD
• Schematic Diagrams of Logic Portion Output Circuit
VSS VSS
OUTPUT
VDD
VDD
• Schematic Diagrams of Driver Output Circuit
VSS VSS
OUTPUT
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MSC1951-01
PIN CONFIGURATION (TOP VIEW)
VSS 1 AD16 2 AD15 3 AD14 4 AD13 5 AD12 6 AD11 7 AD10 8 AD 9 9 AD 8 10 AD 7 11 AD 6 12 AD 5 13 AD 4 14 AD 3 15 AD 2 16 AD 1 17 VDD(GND) 18 A 19 POR 20 40-Pin Plastic DIP
40 PNT 39 TAIL 38 SGP 37 SGO 36 SGN 35 SGM 34 SGL 33 SGK 32 SGJ 31 SGI 30 SGH 29 SGG 28 SGF 27 SGE 26 SGD 25 SGC 24 SGB 23 SGA 22 SCLK 21 DATA
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Pin No. 1 2
Function Power supply (5V) Digit output pin 16 Digit output pin 1 GND TEST pin POWER-ON-RESET pin Data input pin Shift clock pin Segment output pin A Segment output pin P TAIL output pin POINT output pin
~
17 18 19 20 21 22 23
~
38 39 40
~
~
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,
VDD(GND) AD13 AD14 AD15 AD16 TAIL 44 43 42 41 40 VSS 39 38 PNT 37 NC 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 AD12 AD11 AD10 AD 9 AD 8 AD 7 AD 6 AD 5 AD 4 AD 3 VDD(GND) VDD(GND) AD 2 AD 1 A POR DATA SCLK NC : No-connection pin 44-Pin Plastic QFP
Function No-connection pin Digit output pin 12 Pin 22 23 1 2
MSC1951-01
SGO 35
36
34
SGN
SGP
33 32 31 30 29 28 27 26 25 24 23
SGM SGL SGK SGJ SG I SG H SGG SGF SGE SGD SGC
20
21 SGB ~
SGA
Pin
No-connection pin Segment output pin C Segment output pin P TAIL output pin POINT output pin GND Power supply (5V) Digit output pin 16 Digit output pin 13
~
~
~
13 14 15 16 17 18 19 20 21
Digit output pin 1 GND TEST pin POWER-ON-RESET pin GND Data input pin Shift clock pin Segment output pin A Segment output pin B
36 37 38 39 40 41 44
~
~
NC
Function
22
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MSC1951-01
PIN DESCRIPTIONS
Symbol VSS VDD DATA SCLK Type — — I I Power supply pin GND pin Serial data Input of display data/control data Input from MSB Shift clock signal input of shift register Shifts data at the falling edge of SCLK Power-on-reset input. Input of "H" level into this pin with the power turned on initializes this IC. The internal state after the initialization is as follows: 1) AD1 to AD16, SGA to SGP, TAIL and PNT output are in the off state. 2) The duty cycle is set to "0". 3) The digit counter value is set to 16 digits. 4) The buffer pointer is set to AD1. 5) Pin "A" is in the output mode. Usually used as an output mode, and outputs 1/5 of the internal oscillation frequency. In the test mode, operates as an input pin. Grid output pin The output configuration is an emitter follower. Segment output pin The output configuration is an emitter follower. Description
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POR
I
A AD16 to AD1 SGA to SGP TAIL, PNT
I/O O O
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MSC1951-01
ABSOLUTE MAXIMUM RATINGS
Parameter Power Supply Voltage Input Voltage Output Voltage Output Current Storage Temperature
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Symbol VSS.