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PRELIMINARY
S3C6400 RISC MICROPROCESSOR
GPIO
10-
7
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.
INDIVIDUAL REGISTER DESCRIPTIONS
PORT A CONTROL REGISTER
There are five control registers including GPACON, GPADAT, GPAPUD, GPACONSLP and GPAPUDSLP in the
Port A Control Registers.
Register
Address
R/W
Description
Reset Value
GPACON
0x7F008000
R/W
Port A Configuration Register
0x0000
GPADAT
0x7F008004
R/W
Port A Data Register
Undefined
GPAPUD
0x7F008008
R/W
Port A Pull-up Register
0x0005555
GPACONSLP
0x7F00800C
R/W
Port A Sleep mode Configuration Register
0x0
GPAPUDSLP
0x7F008010
R/W
Port A Sleep mode Pull-up/down Register
0x0
GPACON
Bit
Description
Initial State
GPA0
[3:0]
0000 = Input
0001 = Output
0010 = UART RXD[0]
0011 = Reserved
0100 = Reserved
0101 = Reserved
0110 = Reserved
0111 = External Interrupt Group 1 [0]
0000
GPA1
[7:4]
0000 = Input
0001 = Output
0010 = UART TXD[0]
0011 = Reserved
0100 = Reserved
0101 = Reserved
0110 = Reserved
0111 = External Interrupt Group 1 [1]
0000
GPA2
[11:8]
0000 = Input
0001 = Output
0010 = UART CTSn[0] 0011 = Rreserved
0100 = Reserved
0101 = ADDR_CF[0]
0110 = Reserved
0111 = External Interrupt Group 1 [2]
0000
GPA3
[15:12]
0000 = Input
0001 = Output
0010 = UART RTSn[0] 0011 = Reserved
0100 = Reserved
0101 = ADDR_CF[1]
0110 = Reserved
0111 = External Interrupt Group 1 [3]
0000
GPA4
[19:16]
00 = Input
01 = Output
10 = UART RXD[1]
11 = Reserved
0100 = Reserved
0101 = Reserved
0110 = Reserved
0111 = External Interrupt Group 1 [4]
0000
GPA5
[23:20]
0000 = Input
0001 = Output
0010 = UART TXD[1]
0011 = Reserved
0100 = Reserved
0101 = Reserved
0110 = Reserved
0111 = External Interrupt Group 1 [5]
0000
GPA6
[27:24]
0000 = Input
0001 = Output
0010 = UART CTSn[1] 0011 = Reserved
0100 = Reserved
0101 = ADDR_CF[0]
0110 = Reserved
0111 = External Interrupt Group 1 [6]
0000