Samsung S3C2451X User Manual page 268

I/O PORTS
PORT B CONTROL REGISTERS (GPBCON, GPBDAT, GPBUDP, GPBSEL)
Register
GPBCON 0x56000010
GPBDAT 0x56000014
GPBUDP 0x56000018
GPBSEL 0x5600001c
GPBCON
Reserved
GPB10
GPB9
GPB8
GPB7
GPB6
GPB5
GPB4
GPB3
GPB2
GPB1
GPB0
11-12
Address R/W
R/W
R/W
R/W
R/W
Bit
[31:22] Reserved
[21:20] 00 = Input
10 = nXDREQ[0]
[19:18] 00 = Input
10 = nXDACK[0]
[17:16] 00 = Input
10 = nXDREQ[1]
[15:14] 00 = Input
10 = nXDACK[1]
[13:12] 00 = Input
10 = nXBREQ
[11:10] 00 = Input
10 = nXBACK
[9:8] 00 = Input
10 = TCLK
[7:6] 00 = Input
10 = TOUT3
[5:4] 00 = Input
10 = TOUT2
[3:2] 00 = Input
10 = TOUT1
[1:0] 00 = Input
10 = TOUT0
Description
Configures the pins of port B
The data register for port B
Pull-up/down control register for port B
Selects the function of port B
Description
01 = Output
11 = XDREQ[0]
01 = Output
11 = XDACK[0]
01 = Output
11 = XDREQ[1]
01 = Output
11 = XDACK[1]
01 = Output
11 = XBREQ
01 = Output
11 = XBACK
01 = Output
11 = reserved
01 = Output
11 = reserved
01 = Output
11 = reserved
01 = Output
11 = reserved
01 = Output
11 = reserved
S3C2451X RISC MICROPROCESSOR
Reset Value
0x00154555
0x0
0x0
0x1