W90N745CD/W90N745CDG
Table 5.1 W90N745 Pins Description, continued
PIN NAME
IO TYPE
DESCRIPTION
AC97/I²S/PWM/UART3
AC97_nRESET /
I²S_MCLK /
GPIO [0] /
AC97 CODEC Host Interface RESET Output.
I²S CODEC Host Interface System Clock Output.
General Purpose In/Out port [0]
IOU
IOU
IOU
IOU
IOS
nIRQ [2] /
External interrupt request.
USB_PWREN
AC97_DATAI /
I²S_DATAI /
PWM [0] /
USB host power enable output
AC97 CODEC Host Interface Data Input.
I²S CODEC Host Interface Data Input.
PWM Channel 0 output.
DTR3 /
Data Terminal Ready for UART3.
General Purpose In /Out port [1]
AC97 CODEC Host Interface Data Output.
I²S CODEC Host Interface Data Output.
PWM Channel 1 output.
GPIO [1]
AC97_DATAO /
I²S_DATAO /
PWM [1] /
DSR3 /
Data Set Ready for UART3.
GPIO [2]
General Purpose In/Out port [2]
AC97_SYNC /
I²S_LRCLK /
PWM [2] /
TXD3 /
AC97 CODEC Host Interface Synchronous Pulse Output.
I²S CODEC Host Interface Left/Right Channel Select Clock.
PWM Channel 2 output.
Transmit Data for UART3.
GPIO [3]
General Purpose In/Out port [3]
AC97 CODEC Host Interface Bit Clock Input.
I²S CODEC Host Interface Bit Clock.
PWM Channel 3 output.
AC97_BITCLK /
I²S_BITCLK /
PWM [3] /
RXD3 /
Receive Data for UART3.
GPIO [4]
General Purpose In/Out port [4].
USB Interface
DP0
IO
IO
IO
IO
Differential Positive USB IO signal
Differential Negative USB IO signal
Differential Positive USB IO signal
Differential Negative USB IO signal
DN0
DP1
DN1
Miscellaneous
External Interrupt Request
nIRQ [1:0] /
GPIO [17:16] /
IOU
General Purpose I/O
USB_OVRCUR
nIRQ1 is used as USB host over-current detection input
nWDOG /
GPIO [15] /
USB_PWREN
TEST
Watchdog Timer Timeout Flag and Keypad 3-keys reset output, active low
General Purpose In/output
IOU
IDS
USB host power switch enable output
This test pin must be short to ground or left unconnected
Publication Release Date: September 22, 2006
- 15 -
Revision A2
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