W90N745CD Datasheet, PDF (324/422 Pages) Winbond – 16/32-bit ARM microcontroller

W90N745CD/W90N745CDG
BITS
[31:20]
RESERVED
[19:16]
PUPEN0
[15:5]
RESERVED
[4:0]
OMDEN0
DESCRIPTION
-
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.
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
GPIO_DATAOUT0 0xFFF8_3008 R/W GPIO port0 data output register
RESET VALUE
0x0000_0000
31
30
29
28
27
26
25
24
RESERVED
23
22
21
20
19
18
17
16
RESERVED
15
14
13
12
11
10
9
8
RESERVED
7
6
5
4
3
2
1
0
RESERVED
DATAOUT0
BITS
[31:5]
RESERVED
[4:0]
DATAOUT0
DESCRIPTION
-
PORT0 data output value
Writing data to this register will reflect the data value on the
corresponding port0 pin when it is configured as general purpose
output pin. And writing data to reserved bits is not effective.
Publication Release Date: September 22, 2006
- 319 -
Revision A2