Laptop User Manual

S3C2440A RISC MICROPROCESSOR I/O PORTS

9-17

PORT F CONTROL REGISTERS(GPFCON, GPFDAT)

If GPF0 - GPF7 will be used for wake-up signals at power down mode, the ports will be set in interrupt mode.

GPFCON 0x56000050 R/W Configures the pins of port F 0x0

GPFDAT 0x56000054 R/W The data register for port F Undef.

GPFUP 0x56000058 R/W pull-up disable register for port F 0x000

Reserved 0x5600005c - -

GPFCON Bit Description

GPF7 [15:14] 00 = Input 01 = Output

10 = EINT[7] 11 = Reserved

GPF6 [13:12] 00 = Input 01 = Output

10 = EINT[6] 11 = Reserved

GPF5 [11:10] 00 = Input 01 = Output

10 = EINT[5] 11 = Reserved

GPF4 [9:8] 00 = Input 01 = Output

10 = EINT[4] 11 = Reserved

GPF3 [7:6] 00 = Input 01 = Output

10 = EINT[3] 11 = Reserved

GPF2 [5:4] 00 = Input 01 = Output

10 = EINT2] 11 = Reserved

GPF1 [3:2] 00 = Input 01 = Output

10 = EINT[1] 11 = Reserved

GPF0 [1:0] 00 = Input 01 = Output

10 = EINT[0] 11 = Reserved

GPFDAT Bit Description

GPF[7:0] [7:0] When the port is configured as an input port, the corresponding bit is the pin state.

When the port is configured as an output port, the pin state is the same as the

corresponding bit.

When the port is configured as functional pin, the undefined value will be read.

GPFUP Bit Description

GPF[7:0] [7:0] 0: the pull up function attached to to the corresponding port pin is enabled.

1: the pull up function is disabled.