UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 120

• Manufacturer Part Number: UPD75238GJ
• Description: 4 BIT SINGLE-CHIP MICROCOMPUTER
• Manufacturer: NEC [NEC]

Static
mode
register B
8
Segment data
latch (8)
High-voltage
output buffer
Key scan reg-
ister (KS2)
Display data
memory
(32
S16/P100-
S23/P113
4/8
8
8
8
4 bits)
Fig. 4-68 Block Diagram of the FIP Controller/Driver
Segment data latch (16)
S0/P120-
S9/P141
Key scan registers
(KS0 and KS1)
10
10
Display data memory
(64
4/8
12
Internal bus
4 bits)
S10/T15/P142
and S11/T14/P143
Hige-voltage output buffer
2
2
2
2
S12/T13/P150/PH0-
S15/T10/P153/PH3
4
Selector
4
Selector
Port H
4
4
4
4
4
Display
mode
register
4
T0-T9
10
10
Digit
select
register
Digit signal
generator
4
Dimmer
select
register
4
V
LOAD
Key scan
flag (KSF)
Key scan flag
(KSF)
INTKS
IRQKS
set signal
Static
mode
register A
8