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S3C2410A I/O PORTS
9-9
PORT B CONTROL REGISTERS (GPBCON, GPBDAT, and GPBUP)
Register Address R/W Description Reset Value
GPBCON 0x56000010 R/W Configure the pins of port B 0x0
GPBDAT 0x56000014 R/W The data register for port B Undefined
GPBUP 0x56000018 R/W Pull-up disable register for port B 0x0
Reserved 0x5600001C – Reserved Undefined
GPBCON Bit Description
GPB10 [21:20] 00 = Input 01 = Output
10 = nXDREQ0 11 = reserved
GPB9 [19:18] 00 = Input 01 = Output
10 = nXDACK0 11 = reserved
GPB8 [17:16] 00 = Input 01 = Output
10 = nXDREQ1 11 = Reserved
GPB7 [15:14] 00 = Input 01 = Output
10 = nXDACK1 11 = Reserved
GPB6 [13:12] 00 = Input 01 = Output
10 = nXBREQ 11 = reserved
GPB5 [11:10] 00 = Input 01 = Output
10 = nXBACK 11 = reserved
GPB4 [9:8] 00 = Input 01 = Output
10 = TCLK0 11 = reserved
GPB3 [7:6] 00 = Input 01 = Output
10 = TOUT3 11 = reserved
GPB2 [5:4] 00 = Input 01 = Output
10 = TOUT2 11 = reserved]
GPB1 [3:2] 00 = Input 01 = Output
10 = TOUT1 11 = reserved
GPB0 [1:0] 00 = Input 01 = Output
10 = TOUT0 11 = reserved
GPBDAT Bit Description
GPB[10:0] [10:0] When the port is configured as input port, data from external sources can be
read to the corresponding pin. When the port is configured as output port, data
written in this register can be sent to the corresponding pin. When the port is
configured as functional pin, undefined value will be read.
GPBUP Bit Description
GPB[10:0] [10:0] 0: The pull-up function attached to to the corresponding port pin is enabled.
1: The pull-up function is disabled.