Samsung S3C2440A - Manual (Page 266)

I/O PORTS S3C2440A RISC MICROPROCESSOR
9-20
PORT H CONTROL REGISTERS(GPHCON, GPHDAT)
Register Address R/W Description Reset Value
GPHCON 0x56000070 R/W Configures the pins of port H 0x0
GPHDAT 0x56000074 R/W The data register for port H Undef.
GPHUP 0x56000078 R/W pull-up disable register for port H 0x000
Reserved 0x5600007c - -
GPHCON Bit Description
GPH10 [21:20] 00 = Input 01 = Output
10 = CLKOUT1 11 = Reserved
GPH9 [19:18] 00 = Input 01 = Output
10 = CLKOUT0 11 = Reserved
GPH8 [17:16] 00 = Input 01 = Output
10 = UEXTCLK 11 = Reserved
GPH7 [15:14] 00 = Input 01 = Output
10 = RXD[2] 11 = nCTS1
GPH6 [13:12] 00 = Input 01 = Output
10 = TXD[2] 11 = nRTS1
GPH5 [11:10] 00 = Input 01 = Output
10 = RXD[1] 11 = Reserved
GPH4 [9:8] 00 = Input 01 = Output
10 = TXD[1] 11 = Reserved
GPH3 [7:6] 00 = Input 01 = Output
10 = RXD[0] 11 = reserved
GPH2 [5:4] 00 = Input 01 = Output
10 = TXD[0] 11 = Reserved
GPH1 [3:2] 00 = Input 01 = Output
10 = nRTS0 11 = Reserved
GPH0 [1:0] 00 = Input 01 = Output
10 = nCTS0 11 = Reserved