Samsung S3C6400X User Manual page 228

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