Samsung C8278X ユーザーズマニュアル
I/O PORTS
S3C8275X/F8275X/C8278X/F8278X/C8274X/F8274X
9-2
PORT DATA REGISTERS
Table 9-2 gives you an overview of the register locations of all seven S3C8275X/C8278X/C8274X I/O port data
registers. Data registers for ports 0, 1, 2, 3, 4, 5, and 6 have the general format shown in Figure 9-1.
registers. Data registers for ports 0, 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
Location
R/W
Port 0 data register
P0
240
F0H
Set 1, Bank 0
R/W
Port 1 data register
P1
241
F1H
Set 1, Bank 0
R/W
Port 2 data register
P2
242
F2H
Set 1, Bank 0
R/W
Port 3 data register
P3
243
F3H
Set 1, Bank 0
R/W
Port 4 data register
P4
244
F4H
Set 1, Bank 0
R/W
Port 5 data register
P5
245
F5H
Set 1, Bank 0
R/W
Port 6 data register
P6
246
F6H
Set 1, Bank 0
R/W
MSB
S3C8275X/C8278X/C8274X 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. S3C8275X/C8278X/C8274X I/O Port Data Register Format