Rainbow Electronics W90N745CDG - Manual (Page 325)

W90N745CD/W90N745CDG
Publication Release Date: September 22, 2006
- 321 - Revision A2
*In the following pin definition, mark with shading is default function.
11 10 01 00
PT1CFG0
NAME TYPE NAME TYPE NAME TYPE NAME TYPE
PORT1_0 - - - nXDACK O GPIO18 I/O
11 10 01 00
PT1CFG1
NAME TYPE NAME TYPE NAME TYPE NAME TYPE
PORT1_1 - - - nXDREQ I GPIO19 I/O
GPIO Port1 Direction Register (GPIO_DIR1)
REGISTER ADDRESS R/W DESCRIPTION RESET VALUE
GPIO_DIR1 0xFFF8_3014 R/W GPIO port0 in/out direction control
and pull-up enable register
0x0000_0000
31 30 29 28 27 26 25 24
RESERVED
23 22 21 20 19 18 17 16
RESERVED PUPEN1[1:0]
15 14 13 12 11 10 9 8
RESERVED
7 6 5 4 3 2 1 0
RESERVED OMDEN1[1:0]
BITS DESCRIPTION
[31:18] RESERVED -
[17:16] PUPEN1
GPIO19 ~ GPIO18 port pins internal pull-up resister enable
This is a 2-bit registers, set corresponding bit to “1” will enable pull
up resister in IO pin.
1 = enable
0 = disable
After power on the resisters are disabled.
[15:2] RESERVED -