Samsung S3C6400X User Manual page 254

S3C6400 RISC MICROPROCESSOR
PORT M CONTROL REGISTERS
There are three control registers including GPMCON, GPMDAT and GPMPUD in the Port M Control Registers.
Register
GPMCON 0x7F008820
GPMDAT 0x7F008824
GPMPUD 0x7F008828
GPMCON
GPM0
GPM1
GPM2
GPM3 [15:12]
GPM4 [19:16]
GPM5 [23:20]
GPMDAT
GPM[5:0]
Address R/W
R/W
R/W
R/W
Bit
[3:0] 0000 = Input
0010 = Host I/F CSn
0100 = Reserved
0110 = CE_CF[0]
[7:4] 0000 = Input
0010 = Host I/F CSn_main
0100 = Reserved
0110 = CE_CF[1]
[11:8] 0000 = Input
0010 = Host I/F CSn_sub
0100 = Host I/F MDP_VSYNC 0101 = DATA_CF[12]
0110 = IORD_CF
0000 = Input
0010 = Host I/F WEn
0100 = Reserved
0110 = IOWR_CF
0000 = Input
0010 = Host I/F OEn
0100 = Reserved
0110 = IORDY_CF
0000 = Input
0010 = Host I/F INTRn
0100 = Reserved
0110 = Reserved
Bit
[5:0] When the port is configured as input port, the corresponding bit is the pin state.
When the port is configured as 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.
Preliminary product information describe products that are in development,
for which full characterization data and associated errata are not yet available.
Specifications and information herein are subject to change without notice.
Description
Port M Configuration Register
Port M Data Register
Port M Pull-up/down Register
Description
0001 = Output
0011 = Ext. Interrupt[23]
0101 = DATA_CF[10]
0111 = Reserved
0001 = Output
0011 = Ext. Interrupt [24]
0101 = DATA_CF[11]
0111 = Reserved
0001 = Output
0011 = Ext. Interrupt [25]
0111 = Reserved
0001 = Output
0011 = Ext. Interrupt [26]
0101 = DATA_CF[13]
0111 = Reserved
0001 = Output
0011 = Ext. Interrupt [27]
0101 = DATA_CF[14]
0111 = Reserved
0001 = Output
0011 = CF Data Dir.
0101 = DATA_CF[15]
0111 = Reserved
Description
GPIO
Reset Value
0x00222222
Undefined
0x000002AA
Initial State
0010
0010
0010
0010
0010
0010
33
10-