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E2C0026-27-Y3
Semiconductor MSC1937-01
Semiconductor 14/16-Segment 16-Digit Display Controller/Driver
This version: Nov. 1997 MSC1937-01 Previous version: Jul. 1996
GENERAL DESCRIPTION
MSC1937-01 is a Bi-CMOS alphanumeric display controller designed to interface with either vacuum fluorescent display. MSC1937-01 can drive displays with up to 16 digits with either 14 or 16 segments plus a decimal point and comma. MSC1937-01 provides the interface with the microcomputer only by two signal lines: DATA and SCLK.
FEATURES
* Can display up to 16 digits with either 14 or 16 segments plus comma/point. * 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. * Built-in PLA (64 types of ASCII characters (capital letters only) can be displayed). * Executable in 1-byte instruction format * Drive capability Output current : Up to -20 mA (Digit) -10 mA (Segment) : Plastic DIP -5 mA (Segment) : Plastic QFP Withstand voltage : 58V * Can also be used for LED. * Pin compatible with 10937 manufactured by Rockwell. * Supply voltage : 5V 10% * Package options: 40-pin plastic DIP (DIP40-P-600-2.54) (Product name: MSC1937-01RS) 44-pin plastic QFP (QFP44-P-910-0.80-K) (Product name: MSC1937-01GS-K)
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BLOCK DIAGRAM
SGA SGB SGC SGD SGE SGF SGG SGH SGI SGJ SGK SGL SGM SGN SGO SGP PNT TAIL
Semiconductor
DATA SCLK
TIMING AND CONTROL
616 DISPLAY DATA BUFFER
6416 PLA
SEGMENT DECODER
POR VSS VDD A
216 DECIMAL PT. COMMA TAIL
SEGMENT DRIVERS (ANODE)
DIGIT DRIVERS (GRID)
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
MSC1937-01
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Semiconductor
MSC1937-01
INPUT AND OUTPUT CONFIGURATION
* Schematic Diagrams of Logic Portion Input Circuit
VSS VSS
INPUT
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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Semiconductor
MSC1937-01
PIN CONFIGURATION (TOP VIEW)
VSS AD 16 AD 15 AD 14 AD 13 AD 12 AD 11 AD 10 AD 9
1 2 3 4 5 6 7 8 9
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 40-Pin Plastic DIP
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
Pin 1 2 ... 17 18 19 20 21 22 23 ... 38 39 40
Function Power supply (5V) Digit 16 output pin Digit 1 output pin GND TEST pin POWER-ON-RESET pin Data input pin Shift clock pin Segment A output pin Segment P output pin TAIL output pin POINT output pin ... ...
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Semiconductor
PIN CONFIGURATION (TOP VIEW)
VDD(GND)
AD 13 AD 14 44 43
NC 1 2 3 4 5 6 7 8 9 AD 12 AD 11 AD 10 AD 9 AD 8 AD 7 AD 6 AD 5 AD 4 AD 3 10 11
MSC1937-01
AD 15
AD 16
SG P
SG O 35
42
41
40
VSS
39
38
37
36
34
SG N
TAIL
PNT
33 32 31 30 29 28 27 26 25 24 23
SG M SG L SG K SG J SG I SG H SG G SG F SG E SG D SG C
12
13
14
15
16
17
18
19
20
21 SG B
VDD(GND)
VDD(GND)
AD 2
AD 1
A
POR
SCLK
SG A
44-Pin Plastic QFP
Pin 1 2
...
Function No connection Digit 12 output pin
...
DATA
Pin 22 23
...
NC
22
Function No connection Segment C output pin Segment P output pin TAIL output pin POINT output pin GND Power supply (5V) Digit 16 output pin Digit 13 output pin
... ...
13 14 15 16 17 18 19 20 21
Digit 1 output pin GND TEST pin POWER-ON-RESET pin GND Data input pin Shift clock pin Segment A output pin Segment B output pin
36 37 38 39 40 41
...
44
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Semiconductor
MSC1937-01
PIN DESCRIPTION
Symbol VSS VDD DATA SCLK Type -- -- I I Power supply pin GND pin Input of display data/control data Input from MSB Shift clock 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 pins The output format is an emitter follower. Segment output pins The output format is an emitter follower. Description
POR
I
A AD16 - AD1 SGA - SGP TAIL, PNT
I/O O O
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Semiconductor
MSC1937-01
ABSOLUTE MAXIMUM RATINGS
Parameter Power Supply Voltage Input Voltage Output Voltage Output Current Storage Temperature Symbol VSS VIN VGG 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 mA C Unit V V V
RECOMMENDED OPERATING CONDITIONS
Parameter Power Supply Voltage "H" Input Voltage "L" Input Voltage Clock Frequency Oscillation Frequency Frame Frequency Operating Temperature Symbol VSS VIH VIL fC fOSC fFR Top Condition -- Applicable to all input pins -- -- -- -- 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
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Semiconductor
MSC1937-01
ELECTRICAL CHARACTERISTICS
DC Characteristics
(Ta = -40 to +85C, VSS = 5 V 10%, VGG = -53 V 0.5 V) Parameter "H" Input Voltage "L" Input Voltage "H" Input Current "L" Input Current Symbol VIH VIL IIH IIL VOH1 "H" Output Voltage VOH2 Condition Applicable to all input pins VIH = VSS VIL = 0.0 V VSS = 5 V Digit ILOAD = -10mA VSS = 5 V DIP ILOAD = -10mA Segment VSS = 5 V QFP ILOAD = -5mA "L" output current is determined by external pull-down resistor VOUT = VSS - VGG = -53 V no-load Min. 3.6 0.0 -2.0 -2.0 3.0 2.5 2.5 -- -- -- Max. 5.5 1.0 2.0 2.0 -- -- -- VGG+3.0 10.0 10.0 Unit V V mA mA V V V V mA mA
"L" Output Voltage Output Leakage Current Supply Current
VOL IOUT ISS
AC Characteristics
(Ta = -40 to +85C, VSS = 5 V 10%, VGG = -53 V 0.5 V) Parameter Self Oscillation Frequency Frame Frequency Clock Frequency SCLK "H" Time SCLK "L" Time Data Set-up Time Data Hold Time VSS Rise Time POR Pulse Width POR-SCLK Time Internal Processing Time Symbol fOSC fFR fC tCW-H tCW-L tDS tDH tPRZ tRESW tRESS tBUSY Condition -- -- -- -- -- -- -- When mounted in a unit -- -- -- Min. 392 88 -- 1.0 1.0 200 100 100 200 200 40 Max. 548 332 500 -- -- -- -- -- -- -- -- Unit kHz Hz kHz ms ms ns ns ms ms ns ms
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Semiconductor 1) SCLK, Data Timing
MSC1937-01
tBUSY -3.6 V SCLK tCW-H tCW-L tDS tDH fC -1.0 V
DATA
-3.6 V -1.0 V
2) VSS Set 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
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Semiconductor
MSC1937-01
FUNCTIONAL DESCRIPTION
The MSB value of 8-bit serial data determines whether the input data into MSC1937-01 is control data or display data. Display Data By setting MSB = "0", the display data can be entered. The address of PLA is specified by bit 5 to bit 0 following MSB. Table 1 provides the PLA code table.
MSB Command Display Data Function Sets the display contents bit 7 0 bit 6 X bit 5 25 bit 4 24 bit 3 23 bit 2 22 bit 1 21 LSB bit 0 20
X: Don't care
Control Data The control data can be input by setting MSB to "1". In addition, a command type and associated data with the command are determined by the bit 6 to bit 0.
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
X: Don't care
a) Buffer Pointer Control This command changes the display contents only at an arbitrary digit. (The RAM write address is set.) A decimal equivalent value of bits 0 - 3 should be set (desired digit number -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
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Semiconductor b) Digit Counter Control This command sets the number of display digits. Set the desired number of digits in bits 0 to 3.
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
MSC1937-01
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 time
31 bit time AD1 AD2 AD3 AD4 AD5 AD6 AD7 AD8 AD9 AD10 AD11 AD12 AD13 AD14 AD15 AD16 SGn 1 bit time 1 bit time
VSS VGG
31 bit time
VSS VGG
Shown above is the timing when Duty Cycle = 31 (1 bit time = 5 1/fOSC) Fig. 1 Output Timing
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Semiconductor d) Test Mode This mode is not a user function, but is used for outgoing inspection. Table 1 PLA Code Table
MSC1937-01
00
08
10
18
20
28
30
38
01
09
11
19
21
29
31
39
02
0A
12
1A
22
2A
32
3A
03
0B
13
1B
23
2B
33
3B
04
0C
14
1C
24
2C
;
34
3C
05
0D
15
1D
25
2D
35
3D
06
0E
16
1E
26
2E
36
3E
07
0F
17
1F
27
2F
37
3F
16-Segment Display
00
08
10
18
20
28
30
38
01
09
11
19
21
29
31
39
02
0A
12
1A
22
2A
32
3A
03
0B
13
1B
23
2B
33
3B
04
0C
14
1C
24
2C
;
34
3C
05
0D
15
1D
25
2D
35
3D
06
0E
16
1E
26
2E
36
3E
07
0F
17
1F
27
2F
37
3F
14-Segment Display
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Semiconductor
MSC1937-01
SGA S G H S G G S G P S G I S G M
SGB S G J S G C S G D S G H S G G S G P
SGA S G I G J S G C S G D
S S
S GO S G N
S GK S G L
SGO NS G G S M SGF
S GK G L PNT TAIL
SGF
SGE
PNT TAIL
16-SEGMENT
14-SEGMENT
* To set the comma and decimal point, the display data at the display digit is input, then 2C and 2E data is input. Note: Only when 2C and 2E data is 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.
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Semiconductor
MSC1937-01
APPLICATION CIRCUITS
+5 V 10 mF VSS MSC1937-01 VDD ADn 16 TYPICAL GRID (DIGIT) DRIVER CIRCUIT RG RA TYPICAL ANODE (SEGMENT) DRIVER CIRCUIT SGn 16 VACUUM FLUORESCENT DISPLAY DATA SCLK DATA CLOCK HOST SYSTEM
POR
RC
EK -VGG
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Semiconductor
MSC1937-01
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.
Notes for Mounting the Surface Mount Type Package The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. Therefore, before you perform reflow mounting, contact Oki's responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times).
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Semiconductor
MSC1937-01
(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.
Notes for Mounting the Surface Mount Type Package The SOP, QFP, TSOP, SOJ, QFJ (PLCC), SHP and BGA are surface mount type packages, which are very susceptible to heat in reflow mounting and humidity absorbed in storage. Therefore, before you perform reflow mounting, contact Oki's responsible sales person for the product name, package name, pin number, package code and desired mounting conditions (reflow method, temperature and times).
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