Rainbow Electronics W90N740 - Manual (Page 17)

W90N740
Publication Release Date: November 26, 2004
- 13 - Revision A4
Pins Description, continued
NAME
IO
TYPE
PAD
TYPE
DESCRIPTION
USB Interface
DP IO - Differential Positive USB IO signal
DN IO - Differential Negative (Minus) USB IO signal
Miscellaneous
GP[20:17] /
nIRQ[3:0]
IO - External Interrupt Request or General Purpose I/O
GP16 / nXDREQ IO - External DMA Request or General Purpose I/O
GP15 /nXDACK IO - External DMA Acknowledge or General Purpose I/O
GP14 /
TIMER1/SPEED
IO -
Timer 1 or General Purpose I/O. This pin is also used as SPEED,
Speed mode control for external USB transceiver
GP13 /
TIMER0/STDBY
IO -
Timer 0 or General Purpose I/O. This pin is also used as STDBY, StandBy control
for external USB transceiver
GP12 /nWDOG IO - Watchdog Timer Timeout Flag (active-low) or General Purpose I/O
GP11 /RxD IO - UART Receive Data or General Purpose I/O
GP10 /TxD IO - UART Transmit Data or General Purpose I/O
GP9/nDSR/nTOE IO -
UART Receive Clock or General Purpose I/O. This pin is also used as nTOE,
Output Enable control (active-low) for external USB transceiver.
GP8 /nDTR/FSE0 IO -
UART Transmit Clock or General Purpose I/O. This pin is also used as SE0,
Differential Data Transceiver Output for external USB transceiver. T
GP7 /nCD /VO IO -
UART Carrier Detector or General Purpose I/O. This pin is also used as VO, Data
Output for external USB transceiver.
GP6 /nCTS/ VM IO -
UART Clear to Send or General Purpose I/O. This pin is also used as VM, Data
Negative (Minus) Input for external USB receiver.
GP5 /nRTS/ VP IO -
UART Ready to Send or General Purpose I/O. This pin is also used as VP, Data
Positive Input for external USB receiver.
GP4 /nRI /RCV IO -
UART Ring Indicator or General Purpose I/O. This pin is also used as RCV,
Difference Receiver Input.
GP[3:0] IO - General Purpose I/O.
Power/Ground
VDD18 P Core Logic power (1.8V)
VSS18 G Core Logic ground (0V)
VDD33 P IO Buffer power (3.3V)
VSS33 G IO Buffer ground (0V)
USBVDD P USB power (3.3V)
USBVSS G USB ground (0V)
DVDD18 P PLL Digital power (1.8V)
DVSS18 G PLL Digital ground (0V)
AVDD18 P PLL Analog power (1.8V)
AVSS18 G PLL Analog ground (0V)