Rainbow Electronics W90N745CDG User Manual
Page 329
W90N745CD/W90N745CDG
Publication Release Date: September 22, 2006
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325
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Revision
A2
GPIO Port2 Direction Register (GPIO_DIR2)
REGISTER ADDRESS
R/W
DESCRIPTION
RESET
VALUE
GPIO_DIR2 0xFFF8_3024
R/W
GPIO
port2 in/out direction control
and pull-up enable register
0x0000_0000
31
30
29
28
27
26
25
24
RESERVED PUPEN2[9:8]
23
22
21
20
19
18
17
16
PUPEN2[7:0]
15
14
13
12
11
10
9
8
RESERVED OMDEN2[9:8]
7
6
5
4
3
2
1
0
OMDEN2[7:0]
BITS
DESCRIPTION
[31:26] RESERVED -
[25:16]
PUPEN2
GPIO29 ~ GPIO20 port pin internal pull-up resister enable
There are 10 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 registers are disabled.
[15:10] RESERVED -
[9:0]
OMDEN2
GPIO19 ~ GPIO20 output mode enable
1 = output mode
0 = input mode
NOTE: Output mode enable bits are valid only when bit
PT2CFG9-0 is configured as general purpose I/O mode.
Each port pin can be enabled individually by setting the
corresponding control bit.