GMS81508A Datasheet, PDF (54/91 Pages) Hynix Semiconductor – USERS MANUAL

GMS81508/16

Pin Function According to Operation Modes
PIN
Single Chip Mode
R00/D0
I/O
R01/D1
I/O
R02/D2
I/O Programmable I/O Port
R03/D3
I/O
R04/D4
I/O
R05/D5
I/O
R06/D6
I/O
R07/D7
I/O
Microprocessor Mode
I/O
I/O
I/O Data I/O Port from/to External Memory
I/O for CPU.
I/O
I/O
I/O
I/O
3.2. R1 PORT
R1 Port is composed of 8-bit programmable I/O pin.
Register Name
R0 I/O Direction Register
R0 PORT Data Register
Symbol
R1DD
R1
R/W
W
R/W
Address
00C3_H
00C2_H
Initial Value
0000 0000
Not initialized

R1 PORT I/O DIRECTION REGISTER
R1DD
<00C3_H>
W
W
W
W
W
W
W
W
7
6
5
4
3
2
1
0
R1DD7 R1DD6 R1DD5 R1DD4 R1DD3 R1DD2 R1DD1 R1DD0

R1 PORT DATA REGISTER
Determines I/O of R1 port
0 : Input
1 : Output
R1
<00C2_H>
R/W R/W R/W R/W R/W R/W R/W R/W
7
6
5
4
3
2
1
0
R17 R16 R15 R14 R13 R12 R1 R10

Pin Function According to Operation Modes
Port R1 output data
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