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E2C0027-27-Y2

This version: Nov. 1997 MSC1951-01 Previous version: Jul. 1996

E2C0027-27-Y2
This version: Nov. 1997 MSC1951-01 Previous version: Jul. 1996
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. MSC1951-01 adopts a serial interface system, which allows data transfer from the microcomputer only by two signal lines of SCLK and DATA.
FEATURES
BLOCK DIAGRAM
DATA SCLK
TIMING AND CONTROL
SEGMENT DECODER
POR VSS VDD A
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
INPUT AND OUTPUT CONFIGURATION
· Schematic Diagrams of Logic Portion Input Circuit
VSS VSS
INPUT
· Schematic Diagrams of Logic Portion Output Circuit
VSS VSS
OUTPUT
· Schematic Diagrams of Driver Output Circuit
VSS VSS
OUTPUT
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
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
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
SGM SGL SGK SGJ SG I SG H SGG SGF SGE SGD SGC
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
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
Function
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
A AD16 to AD1 SGA to SGP TAIL, PNT
MSC1951-01
ABSOLUTE MAXIMUM RATINGS
Parameter Power Supply Voltage Input Voltage Output Voltage Output Current Storage Temperature Symbol VSS VIN VSS Digit ILOAD TSTG Segment DIP QFP Rating -0.3 to +6.5 -0.3 to VSS + 0.3 VSS - 58 to VSS + 0.3 -25 -20 -10 -55 to 150 Unit V V V mA mA mA °C
RECOMMENDED OPERATING CONDITIONS
Parameter Power Supply Voltage High Level Input Voltage Low Level Input Voltage Clock Frequency OSC Frequency Frame Frequency Operating Temperature Symbol VSS VIH VIL fC fOSC fFR Top Condition - All inputs All inputs - - - - Min. 4.5 3.6 0.0 - - - -40 Typ. - - - - 500 195 - Max. 5.5 5.5 1.0 500 - - 85 Unit V V V kHz kHz Hz °C
MSC1951-01
ELECTRICAL CHARACTERISTICS
DC Characteristics
Low Level Output Voltage Output Leakage Current Current Consumption
VOL IOUT ISS
AC Characteristics
MSC1951-01
TIMING DIAGAM
a) SCLK and Data Timing
tBUSY -3.6 V SCLK tCW-H tCW-L tDS tDH fC -1.0 V
-3.6 V -1.0 V
b) VSS Input and Data Word Transfer Timing
-4.5 V VSS tPRZ POR tRESW tRESS SCLK Data Word MSB side LSB side MSB side Data Word LSB side tBUSY -0 V
MSC1951-01
FUNCTIONAL DESCRIPTION
Control Data The control data can be input by setting MSB to "1". In addition, a command type and set values are determined by the bit 6 to bit 0 following MSB.
MSB Command Buffer Pointer Control Digit Counter Control Duty Cycle Control Test Mode Function Specifies the RAM address. Sets the number of display digits. Sets the duty value. Sets the test mode. bit 7 1 1 1 1 bit 6 0 1 1 0 bit 5 1 0 1 0 bit 4 0 0 24 24 bit 3 23 23 23 X bit 2 22 22 22 X bit 1 21 21 21 X LSB bit 0 20 20 20 X
a) Buffer Pointer Control This command changes the display contents only at an arbitrary digit. (The RAM write address is set.) To input data into bits 0 to 3, set (desired digit -2). (Example) When specifying AD4, the set value is 2 (0010).
Specified Digit
Set Value of Bits 0 to 3 15 (1111) 0 (0000) 1 (0001) 2 (0010) 3 (0011) 4 (0100) 5 (0101) 6 (0110)
Specified Digit
Set Value of Bits 0 to 3 7 (0111) 8 (1000) 9 (1001) 10 (1010) 11 (1011) 12 (1100) 13 (1101) 14 (1110)
AD1 AD2 AD3 AD4 AD5 AD6 AD7 AD8
AD9 AD10 AD11 AD12 AD13 AD14 AD15 AD16
Number of Display Digits 1 2 3 4 5 6 7 8 Set Value of Bits 0 to 3 1 (0001) 2 (0010) 3 (0011) 4 (0100) 5 (0101) 6 (0110) 7 (0111) 8 (1000) Number of Display Digits 9 10 11 12 13 14 15 16
MSC1951-01
Set Value of Bits 0 to 3 9 (1001) 10 (1010) 11 (1011) 12 (1100) 13 (1101) 14 (1110) 15 (1111) 0 (0000)
c) Duty Cycle Control This command sets the duty cycle of the driver output. This command allows the brightness to be adjusted by 1 / 32 step. As shown in Figure 1, the blank time between digits or between the segments is specified by 1 bit time on the hardware. Therefore, the set value ranges from 0 to 31.
1 DISPLAY CYCLE 512 bit times
31bit times AD1 AD2 AD3 AD4 AD5 AD6 AD7 AD8 AD9 AD10 AD11 AD12 AD13 AD14 AD15 AD16 SGn 1 bit time
VSS VGG
31bit times 1 bit time
VSS VGG
MSC1951-01
Function Segment A On Segment B On Segment C On Segment D On Segment E On Segment F On Segment G On Segment H On Segment I On Segment J On Segment K On Segment L On Segment M On Segment N On Segment O On Segment P On Segment A On Segment A & B On Segment A-C On Segment A-D On Segment A-E On Segment A-F On Segment A-G On Segment A-H On Segment A-I On Segment A-J On Segment A-K On Segment A-L On Segment A-M On Segment A-N On Segment A-O On Segment A-P On Number 0 Number 1 Number 2 Number 3 Number 4 Number 5 Number 6 Number 7 Number 8 Number 9 Letter P Letter L Comma Blank Decimal Blank Number 0 Number 1 Number 2 Number 3 Number 4 Number 5 Number 6 Number 7 Number 8 Number 9 Letter A Letter B Letter C Letter D Letter E Letter F
1 to 16 Segments
MSC1951-01
Table 2 PLA Code (At the time of 7-segment Display)
SGP SGO SGN SGM SGL SGK SGJ SGI SGH SGG SGF SGE SGD SGC SGB SGA 16-SEGMENT BARGRAPH
SGA SGF SGG SGB
SGE SGD PNT TAIL 7-SEGMENT ALPHANUMERIC
MSC1951-01
Table 3 PLA Code (At the time of bar display)
00 01 02 03 04 05 06 07 08 09 0A 0B 0C 0D 0E 0F SEE FIGURE 2 SGP SGO SGN SGM SGL SGK SGJ SGI SGH SGG SGF SGE SGD SGC SGB SGA 10 11 12 13 14 15 16 17 18 19 1A 1B 1C 1D 1E 1F SEE FIGURE 2 SGP SGO SGN SGM SGL SGK SGJ SGI SGH SGG SGF SGE SGD SGC SGB SGA 20 21 22 23 24 25 26 27 28 29 2A 2B 2C 2D 2E 2F 0 SGP SGO SGN SGM SGL SGK SGJ SGI SGH SGG SGF SGE SGD SGC SGB SGA 30 31 32 33 34 35 36 37 38 39 3A 3B 3C 3D 3E 3F 0 SGP SGO SGN SGM SGL SGK SGJ SGI SGH SGG SGF SGE SGD SGC SGB SGA 1 2 3 4 5 6 7 8 9 A B C D E F 7-SEGMENT CHARACTERS 1 2 3 4 5 6 7 8 9 P L 7-SEGMENT CHARACTERS
7-SEGMENT CHARACTERS
SPECIAL BARGRAPH CODES
7-SEGMENT CHARACTERS
SPECIAL BARGRAPH CODES
MSC1951-01
To set the comma and point, the display data at the display digit is input, then 2C and 2E data are input. Note: Only when 2C and 2E data are entered, the write address in the RAM is not automatically incremented. For other data, the address specified by the Buffer Pointer Control command is automatically incremented by one each time the display data is input.
APPLICATION CIRCUIT
+5V 10mF VSS MSC1951-01 VDD ADn 16 TYPICAL GRID (DIGIT) DRIVER CIRCUIT RG RA TYPICAL ANODE (SEGMENT) DRIVER CIRCUIT SGn 16 VACUUM FLUORESCENT DISPLAY POR DATA CLOCK HOST SYSTEM
DATA SCLK
MSC1951-01
PACKAGE DIMENSIONS
(Unit : mm)
DIP40-P-600-2.54
Package material Lead frame material Pin treatment Solder plate thickness Package weight (g)
Epoxy resin 42 alloy Solder plating 5 mm or more 6.10 TYP.
MSC1951-01
(Unit : mm) QFP44-P-910-0.80-K
Mirror finish
Package material Lead frame material Pin treatment Solder plate thickness Package weight (g)
Epoxy resin 42 alloy Solder plating 5 mm or more 0.35 TYP.