Rainbow Electronics W90N740 - Manual (Page 196)

W90N740
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GPIOCFG3_0 [1:0]: Operating mode for GPIO3, GPIO2, GPIO1, and GPIO0
11 10 01 00
GPIOCFG3_0
Name Type Name Type Name Type Name Type
GPIO3 NXDREQ2 IU GP3 I/O
GPIO2 NXDREQ1 IU GP2 I/O
GPIO1 NWTC O GP1 I/O
GPIO0
RESERVED RESERVED
NRTC O GP0 I/O
GPIO Direction Register (GPIO_DIR)
Register Address R/W Description Reset Value
GPIO_DIR 0xFFF8.3004 R/W GPIO Direction Register 0x0000.0000
31 30 29 28 27 26 25 24
RESERVED
23 22 21 20 19 18 17 16
RESERVED GPIOD20 GPIOD19 GPIOD18 GPIOD17 GPIOD16
15 14 13 12 11 10 9 8
GPIOD15 GPIOD14 GPIOD13 GPIOD12 GPIOD11 GPIOD10 GPIOD9 GPIOD8
7 6 5 4 3 2 1 0
GPIOD7 GPIOD6 GPIOD5 GPIOD4 GPIOD3 GPIOD2 GPIOD1 GPIOD0
GPIODx: GPIOx direction
The GPIODx is used to set the direction of GPIOx if it is used as a regular input/output pin (GPx).
0 = GPIOx is an input pin
1 = GPIOx is an output pin