UPD75238GJ NEC [NEC], UPD75238GJ Datasheet - Page 40

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

40
4. PERIPHERAL HARDWARE FUNCTIONS
4.1 DIGITAL I/O PORTS
The PD75238 employs memory-mapped I/O, enabling all I/O ports to be mapped to data memory space.
Fig. 4-1 Data Memory Address Assigned to Digital Port
Address
FFDH
FFAH
FFBH
FFCH
FFEH
FF0H
FF1H
FF2H
FF3H
FF4H
FF5H
FF6H
FF7H
FF8H
FF9H
FFFH
P113
P123
P133
P143
P153
P103
P73
P03
P13
P23
P33
P43
P53
P63
P83
P93
3
P112
P122
P132
P142
P152
P102
P02
P12
P22
P32
P42
P52
P62
P72
P82
P92
2
P111
P121
P131
P141
P151
P101
P01
P11
P21
P31
P41
P51
P61
P71
P81
P91
1
P100
P110
P120
P130
P140
P150
P20
P50
P00
P10
P30
P40
P60
P70
P80
P90
0
Symbol
PORT 0
PORT 1
PORT 2
PORT 3
PORT 4
PORT 5
PORT 6
PORT 7
PORT 8
PORT 9
PORT 10
PORT 11
PORT 12
PORT 13
PORT 15
PORT 14
PD75238