I/O Port Data Register; I/O Port Drive Control Register - Samsung S3C2500B User Manual

S3C2500B
15.3.6 I/O PORT DATA REGISTER (IOPDATA1/2)
The I/O port data registers, IOPDATA1/2, contain one-bit read values for I/O ports that are configured to input
mode and one-bit write values for ports that are configured to output mode.
Register Address
IOPDATA1 0xF003001C
IOPDATA2 0xF0030020
15.3.7 I/O PORT DRIVE CONTROL REGISTER (IOPDRV1/2)
The I/O port drive control registers, IOPDRV1/2, control the pad type for which is operating as a tri-state output
mode or an open-drain output mode. This register's each bit value programmed as write '1' value for open-drain
output mode or write '0' value for tri-state output mode.
Register Address
IOPDRV1 0xF0030024
IOPDRV2 0xF0030028
Table 15-7. IOPDATA1/2 Register
R/W
R/W I/O port data register for port 0 to 31
R/W I/O port data register for port 32 to 63
Table 15-8. IOPDRV1/2 Register
R/W
R/W I/O port drive control register for port 0 to 31
R/W I/O port drive control register for port 32 to 63
Description
Description
I/O PORTS
Reset Value
Undefined
Undefined
Reset Value
0x00000000
0x00000000
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