Rainbow Electronics W90N745CDG User Manual
Page 20
W90N745CD/W90N745CDG
Publication Release Date: September 22, 2006
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15
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Revision
A2
Table 5.1 W90N745 Pins Description, continued
PIN NAME
IO TYPE
DESCRIPTION
AC97/I
²
S/PWM/UART3
AC97_nRESET /
I
²
S_MCLK /
GPIO [0] /
nIRQ [2] /
USB_PWREN
IOU
AC97 CODEC Host Interface RESET Output.
I
²
S CODEC Host Interface System Clock Output.
General Purpose In/Out port [0]
External interrupt request.
USB host power enable output
AC97_DATAI /
I
²
S_DATAI /
PWM [0] /
DTR3 /
GPIO [1]
IOU
AC97 CODEC Host Interface Data Input.
I
²
S CODEC Host Interface Data Input.
PWM Channel 0 output.
Data Terminal Ready for UART3.
General Purpose In /Out port [1]
AC97_DATAO /
I
²
S_DATAO /
PWM [1] /
DSR3 /
GPIO [2]
IOU
AC97 CODEC Host Interface Data Output.
I
²
S CODEC Host Interface Data Output.
PWM Channel 1 output.
Data Set Ready for UART3.
General Purpose In/Out port [2]
AC97_SYNC /
I
²
S_LRCLK /
PWM [2] /
TXD3 /
GPIO [3]
IOU
AC97 CODEC Host Interface Synchronous Pulse Output.
I
²
S CODEC Host Interface Left/Right Channel Select Clock.
PWM Channel 2 output.
Transmit Data for UART3.
General Purpose In/Out port [3]
AC97_BITCLK /
I
²
S_BITCLK /
PWM [3] /
RXD3 /
GPIO [4]
IOS
AC97 CODEC Host Interface Bit Clock Input.
I
²
S CODEC Host Interface Bit Clock.
PWM Channel 3 output.
Receive Data for UART3.
General Purpose In/Out port [4].
USB Interface
DP0
IO
Differential Positive USB IO signal
DN0
IO
Differential Negative USB IO signal
DP1
IO
Differential Positive USB IO signal
DN1
IO
Differential Negative USB IO signal
Miscellaneous
nIRQ [1:0] /
GPIO [17:16] /
USB_OVRCUR
IOU
External Interrupt Request
General Purpose I/O
nIRQ1 is used as USB host over-current detection input
nWDOG /
GPIO [15] /
USB_PWREN
IOU
Watchdog Timer Timeout Flag and Keypad 3-keys reset output, active low
General Purpose In/output
USB host power switch enable output
TEST
IDS
This test pin must be short to ground or left unconnected