Rainbow Electronics W90P710CDG User Manual
Page 395
W90P710CD/W90P710CDG
Publication Release Date: September 19, 2006
- 395 -
Revision B2
31
30
29
28
27
26
25
24
RESERVED
23
22
21
20
19
18
17
16
RESERVED PUPEN0[3:0]
15
14
13
12
11
10
9
8
RESERVED
7
6
5
4
3
2
1
0
RESERVED OMDEN0[4:0]
Bits
Description
[31:20] RESERVED
-
[19:16]
PUPEN0
GPIO3 -GPIO0 port pin internal pull-up resister enable
There are 4 bits for this register, the corresponding bit is set to “1”
will enable pull-up resister on IO pin.
1 = enable
0 = disable
After power on the pull-up resisters are disabled.
NOTE: GPIO4 is used as AC97 BITCLK input, an IO pad with
Schmitt trigger input buffer PDB04SDGZ is implemented for this
pin. Due to TSMC IO library without pull-up register, an external
pull-up resister is necessary.
[15:5] RESERVED
[4:0]
OMDEN0
GPIO4 ~GPIO0 output mode enable
1 = output mode
0 = input mode
NOTE: Output mode enable bits are valid only when bit
PT0CFG4-0 is configured as general purpose I/O mode.
Each port pin can be enabled individually by setting the
corresponding control bit.
GPIO Port0 Data Output Register (GPIO_DATAOUT0)
REGISTER ADDRESS
R/W
DESCRIPTION
RESET
VALUE
GPIO_DATAOUT0 0xFFF8_3008 R/W GPIO
port0 data output register
0x0000_0000