Copyright ⓒ. 2014. All Rights Reserved.
3. Interface
3.4 Audio
This module is provided with PCM interface. The resistor of pulled-up or
pulled-down in this pin must be over 50Kohm.
Table 3. PCM Pin descriptions
3.5 User interface
Pin No.
Signal Name
Direction
Function
15
NAD_OnOff
I
Turn on and off the module
Active High
9
NAD_Status
O
Indicate the active status of module
Active High
10
PowerOn_Off
O
Supply the power of module
Active High
17
HwakeUP
O
Be used to wake up the host system
Active Low
11
USB_Pow_On
I
Communicate with USB device
Active High
Table 4. User interface Pin descriptions
Pin NO.
Signal Name
Pin I/O
(Modem host)
Function Description
23
D_Audio_NAD_SCLK
O
PCM Interface bit clock line
24
D_Audio_NAD_LRCK
O
PCM Interface frame clock line
25
D_Audio_NAD_SDTI
I
PCM Interface digital audio data in
26
D_Audio_NAD_SDTO
O
PCM Interface digital audio data out
