OKI MSC1205GS-2K, MSC1205-RS Datasheet
E2C0018-27-Y3
¡ Semiconductor MSC1205
¡ Semiconductor
This version: Nov. 1997
Previous version: Jul. 1996
MSC1205
32-Bit Duplex Controller/Driver with Digital Dimming Function
GENERAL DESCRIPTION
The MSC1205 is a Bi-CMOS display driver for a 1/2-duty vacuum fluorescent display tube. It
consists of a 64-bit shift register, latch circuits, a digital diming circuit, and drivers.
The MSC1205 provides an interface with a microcomputer only by three signal lines: LOAD,
DATA, and CLOCK.
FEATURES
• Power Supply Voltage: 8 to 18V (built-in 5V regulator for logic)
• Built-in 1-terminal RC oscillation circuit (with external capacitor)
• Built-in digital dimming circuit
10-bit resolution
Programmable in the duty range of 0/2048 (0%) to 1015.5/2048 (49.6%).
• Can directly drive 32 ¥ 2 display anodes.
• Built-in power-on reset circuit
• Package options:
42-pin plastic DIP (DIP42-P-600-2.54) (Product name: MSC1205-RS)
44-pin plastic QFP (QFP44-P-910-0.80-2K) (Product name: MSC1205GS-2K)
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¡ Semiconductor MSC1205
BLOCK DIAGRAM
GRID1
GRID2
V
DD
V
SS
BLANK
OSC
LOAD
VOLTAGE
REGULATOR
5V
DOWN COUNTER
10 bits
bo
R
(fosc)
OSC
LOAD TIMING
CONTROL
(POR)
COMPA-
RATOR
10 bits
(SEGLD)
(DIMLD)
SEG32
L
SEG31 SEG2 SEG1
DRIVER
32 bits
LEVEL SHIFTER
BL
MULTIPLEXER
ST
32 bits 32 bits
(bo)
LATCH
TIMING
GENE-
RATOR
L
L
LATCH
LATCH
Q1-Q10
Q1-Q64
32 bits
64 bits
8 to 18V
5V
DATA
CLOCK
D
(2 bits)
D
Q1-Q64
(64 bits)
SHIFT REGISTER
TEST
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¡ Semiconductor MSC1205
INPUT AND OUTPUT CONFIGURATION
• Schematic Diagrams of Logic Portion Input Circuit 1
V
DD
(5V Reg.)
INPUT
V
SS
V
SS
• Schematic Diagrams of Logic Portion Input
Circuit 2
BLANK
V
DD
(5V Reg.)
• Schematic Diagrams of Logic Portion Input
Circuit 3
TEST
V
DD
(5V Reg.)
V
SS
V
SS
• Schematic Diagrams of Driver Output Circuit
V
DD
V
SS
V
DD
V
OUTPUT
SS
V
SS
V
SS
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¡ Semiconductor MSC1205
PIN CONFIGURATION (TOP VIEW)
DATA V
CLOCK TEST
LOAD OSC
SEG1
SEG2 GRID2
SEG3 GRID1
SEG4 V
SEG5 SEG32
SEG6 SEG31
SEG7 SEG30
SEG8 SEG29
SEG9 SEG28
SEG10 SEG27
SEG11 SEG26
SEG12 SEG25
SEG13 SEG24
1
42
SS
241
3
4
40
39
BLANK
538
637
7
36
DD
835
9
10
11
12
34
33
32
31
13 30
14
29
15 28
16 27
SEG14 SEG23
SEG15 SEG22
SEG16 SEG21
SEG17 SEG20
SEG18 SEG19
17 26
18
25
19 24
20 23
21 22
42-Pin Plastic DIP
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¡ Semiconductor MSC1205
PIN CONFIGURATION (TOP VIEW)
SS
TEST
OSC
BLANK
35
GRID2
34
SEG2
44
SEG1
43
LOAD
42
CLOCK
DATANCV
41
40
39
38
37
36
SEG3
SEG4
SEG5
SEG6
SEG7
SEG8
SEG9
SEG10
SEG11
SEG12
SEG13
10
11
1
2
3
4
5
6
7
8
9
12
13
14
15
16
17
18
19
20
21
SEG14
SEG15
SEG16
SEG17
SEG18NCSEG19
SEG20
SEG21
SEG22
33
32
31
30
29
28
27
26
25
24
23
22
SEG23
GRID1
V
DD
SEG32
SEG31
SEG30
SEG29
SEG28
SEG27
SEG26
SEG25
SEG24
NC : No-connection pin
44-Pin Plastic QFP
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