GMS84512 Datasheet, PDF (29/123 Pages) Hynix Semiconductor – 8-BIT SINGLE CHIP MICROCOMPUTER

GMS 84512 / 84524
3.1.3 R2 PORT
8- BIT I/O Port
0
1
2
R2
3
PORT ₄
5
6
7
Pin Name
R20
R21
R22
R23
R24
R25/ T2048
R26/ EC2
R27/ EC3
Selection Mode
Port Selection
2nd Functin
R20 ( I/O )
R20 ( I/O )
R21 ( I/O )
R21 ( I/O )
R22 ( I/O )
R22 ( I/O )
R23 ( I/O )
R23 ( I/O )
R24 ( I/O )
R24 ( I/O )
R25 ( I/O )
T2048 ( O )
R26 ( I/O )
EC2 ( I )
R27 ( I/O )
EC3 ( I )
Type
IOA
IOA
IOA
IOA
IOA
IOD
IOB
IOB
l Register Structure and Description
Register Name
R2 I/O Direction Register
R2 Port Data Register
Port Function Selection Register
PWM Control Register 2
Symbol R/W
R2DD W
R2 R/W
FUNC W
PWMCR2 R/W
Address
00C5_H
00C4_H
00CA_H
00E5_H
Initial Value
0000 0000
Not initialized
---0 0000
---0 0000
R2 PORT I/O DIRECTION REGISTER
R2DD
<00C5_H>
W
W
W
W
W
W
W
W
7
6
5
4
3
2
1
0
R2DD7 R2DD6 R2DD5 R2DD4 R2DD3 R2DD2 R2DD1 R2DD0
Initial value when MCU Reset
[ 0000 0000 ]
Assign the direction of R2 port
R2DD is assigned to R20 port
0 : Input
1 : Output
3-4