Samsung S3C9228/P9228 Manual De Usuario
I/O PORTS
S3C9228/P9228
9-2
PORT DATA REGISTERS
Table 9-2 gives you an overview of the register locations of all seven S3C9228 I/O port data registers. Data
registers for ports 1, 2, 3, 4, 5, and 6 have the general format shown in Figure 9-1.
registers for ports 1, 2, 3, 4, 5, and 6 have the general format shown in Figure 9-1.
Table 9-2. Port Data Register Summary
Register Name
Mnemonic
Decimal
Hex
R/W
Port 0 data register
P0
228
E4H
R/W
Port 1 data register
P1
229
E5H
R/W
Port 2 data register
P2
230
E6H
R/W
Port 3 data register
P3
231
E7H
R/W
Port 4 data register
P4
232
E8H
R/W
Port 5 data register
P5
233
E9H
R/W
Port 6 data register
P6
234
EAH
R/W
MSB
S3C9228 I/O Port Data Register Format (n = 0-6)
.7
.6
.5
.4
.3
.2
.1
.0
LSB
Pn.7
Pn.6
Pn.5
Pn.4
Pn.3
Pn.2
Pn.1
Pn.0
Figure 9-1. S3C9228 I/O Port Data Register Format