Rainbow Electronics W90N740 - Manual (Page 194)

W90N740
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GPIOCFG19 [19:18]: Operating mode for GPIO19
11 10 01 00
GPIOCFG19
Name Type Name Type Name Type Name Type
GPIO19 RESERVED I RESERVED nIRQ2 I GP19 IO
nIRQ2 is one of the external interrupt input pins.
GPIOCFG18 [17:16]: Operating mode for GPIO18
11 10 01 00
GPIOCFG18
Name Type Name Type Name Type Name Type
GPIO18 RESERVED I
OVRCU
R
I nIRQ1 I GP18 IO
OVRCUR is used as over current indicator if this field set to 10.
nIRQ1 is one of the external interrupt input pins.
GPIOCFG17 [15:14]: Operating mode for GPIO17
11 10 01 00
GPIOCFG17
Name Type Name Type Name Type Name Type
GPIO17 RESERVED RESERVED nIRQ0 I GP17 IO
nIRQ0 is one of the external interrupt input pins.
GPIOCFG16_15 [13:12]: Operating mode for GPIO16 and GPIO15
11 10 01 00 GPIOCFG16_1
5 Name Type Name Type Name Type Name Type
GPIO16 RESERVED O RESERVED NXDREQ3 I GP16 I/O
GPIO15 RESERVED O RESERVED nXDACK O GP15 I/O
NXDREQ3 is the external DMA request signal pin.
nXDACK is the external DMA granted signal pin.
GPIOCFG14 [11:10]: Operating mode for GPIO14
11 10 01 00
GPIOCFG14
Name Type Name Type Name Type Name Type
GPIO14 RESERVED O SPEED O TIMER1 O GP14 IO
SPEED is a USB IO port, which controls the external USB transceiver speed mode.
TIMER1 is the tone output of TIMER1.