Rainbow Electronics W90N745CDG - Manual (Page 332)

W90N745CD/W90N745CDG
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GPIO Port4 Direction Register (GPIO_DIR4)
REGISTER ADDRESS R/W DESCRIPTION RESET VALUE
GPIO_DIR4 0xFFF8_3044 R/W
GPIO port4 in/out direction control
and pull-up enable register
0x0000_0000
31 30 29 28 27 26 25 24
RESERVED PUPEN4[
10]
RESERVED
23 22 21 20 19 18 17 16
RESERVED
15 14 13 12 11 10 9 8
RESERVED OMDEN4
[10]
RESERVED
7 6 5 4 3 2 1 0
RESERVED
BITS DESCRIPTION
[31:27] RESERVED -
[26] PUPEN4
GPIO28 pin internal pull-up resister enable
There is 1 bit for this register, the bit is set to “1” will enable pull-up
resister on IO pin.
1 = enable
0 = disable
After power on the pull-up resister is disabled
[25:11] RESERVED -
[10] OMDEN4
GPIO28 output mode enable
1 = enable
0 = disable
NOTE: Output mode enable bits are valid only when bit
PT4CFG10 is configured as general purpose I/O mode.
Each port pin can be enabled individually by setting the
corresponding control bit.
[9:0] RESERVED -