Samsung S3C6400X, Руководство пользователя, Страница: 254 / 1189

PRELIMINARY
S3C6400 RISC MICROPROCESSOR GPIO
10-
33
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.
PORT M CONTROL REGISTERS
There are three control registers including GPMCON, GPMDAT and GPMPUD in the Port M Control Registers.
Register Address R/W Description Reset Value
GPMCON 0x7F008820 R/W Port M Configuration Register 0x00222222
GPMDAT 0x7F008824 R/W Port M Data Register Undefined
GPMPUD 0x7F008828 R/W Port M Pull-up/down Register 0x000002AA
GPMCON Bit Description Initial State
GPM0 [3:0] 0000 = Input 0001 = Output
0010 = Host I/F CSn 0011 = Ext. Interrupt[23]
0100 = Reserved 0101 = DATA_CF[10]
0110 = CE_CF[0] 0111 = Reserved
0010
GPM1 [7:4] 0000 = Input 0001 = Output
0010 = Host I/F CSn_main 0011 = Ext. Interrupt [24]
0100 = Reserved 0101 = DATA_CF[11]
0110 = CE_CF[1] 0111 = Reserved
0010
GPM2 [11:8] 0000 = Input 0001 = Output
0010 = Host I/F CSn_sub 0011 = Ext. Interrupt [25]
0100 = Host I/F MDP_VSYNC 0101 = DATA_CF[12]
0110 = IORD_CF
0111 = Reserved
0010
GPM3 [15:12] 0000 = Input 0001 = Output
0010 = Host I/F WEn 0011 = Ext. Interrupt [26]
0100 = Reserved 0101 = DATA_CF[13]
0110 = IOWR_CF 0111 = Reserved
0010
GPM4 [19:16] 0000 = Input 0001 = Output
0010 = Host I/F OEn 0011 = Ext. Interrupt [27]
0100 = Reserved 0101 = DATA_CF[14]
0110 = IORDY_CF 0111 = Reserved
0010
GPM5 [23:20] 0000 = Input 0001 = Output
0010 = Host I/F INTRn 0011 = CF Data Dir.
0100 = Reserved 0101 = DATA_CF[15]
0110 = Reserved 0111 = Reserved
0010
GPMDAT Bit Description
GPM[5:0] [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.