Samsung S3C6400X, User Manual, Page: 246 / 1189

PRELIMINARY
S3C6400 RISC MICROPROCESSOR GPIO
10-
25
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.
PORT J CONTROL REGISTERS
There are five control registers including GPJCON, GPJDAT, and GPJPUD, GPJCONSLP and GPJPUDSLP in
the Port J Control Registers.
Register Address R/W Description Reset Value
GPJCON 0x7F008120 R/W Port J Configuration Register 0x00
GPJDAT 0x7F008124 R/W Port J Data Register Undefined
GPJPUD 0x7F008128 R/W Port J Pull-up/down Register 0x00555555
GPJCONSLP 0x7F00812C R/W Port J Sleep mode Configuration Register 0x0
GPJPUDSLP 0x7F008130 R/W Port J Sleep mode Pull-up/down Register 0x0
GPJCON Bit Description Initial State
GPJ0 [1:0] 00 = Input 01 = Output
10 = LCD VD[16] 11 = reserved
00
GPJ1 [3:2] 00 = Input 01 = Output
10 = LCD VD[17] 11 = reserved
00
GPJ2 [5:4] 00 = Input 01 = Output
10 = LCD VD[18] 11 = reserved
00
GPJ3 [7:6] 00 = Input 01 = Output
10 = LCD VD[19] 11 = reserved
00
GPJ4 [9:8] 00 = Input 01 = Output
10 = LCD VD[20] 11 = reserved
00
GPJ5 [11:10] 00 = Input 01 = Output
10 = LCD VD[21] 11 = reserved
00
GPJ6 [13:12] 00 = Input 01 = Output
10 = LCD VD[22] 11 = reserved
00
GPJ7 [15:14] 00 = Input 01 = Output
10 = LCD VD[23] 11 = reserved
00
GPJ8 [17:16] 00 = Input 01 = Output
10 = LCD HSYNC 11 = Reserved
00
GPJ9 [19:18] 00 = Input 01 = Output
10 = LCD VSYNC 11 = Reserved
00
GPJ10 [21:20] 00 = Input 01 = Output
10 = LCD VDEN 11 = Reserved
00
GPJ11 [23:22] 00 = Input 01 = Output
10 = LCD VCLK 11 = Reserved
00