Copyright ⓒ. 2014. All Rights Reserved.
3. Interface
3.2 Pin description
Table 1. Pin descriptions
Signal Name
Type
Pin
Description
USB
USB_D+
USB_D-
USB_VBUS
IO
IO
I
38
36
29
USB differential data line (+)
USB differential data line (-)
USB power Supply
Audio
PCM
PCM_3.3V_SYNC
PCM_3.3V_CLK
PCM_3.3V_TXD
PCM_3.3V_RXD
I
I
O
I
20
19
16
18
PCM interface sync
PCM interface clock
PCM interface digital audio data out
PCM interface digital audio data in
User
Interface
BOOT_OK
RESET_IN
MSG
96H_END
ACC_ON_SLEEP
O
I
O
O
I
11
28
12
27
30
Indicates that the Modem boot is complete.
Control line to unconditionally restart the module.
Indicates that the Modem receive Urgent message.
Indicates that the 96hr sleep mode is end.
Control line to power on or 96hr sleep mode.
Power
VBATT
GND
I
-
31,32
3,4,17,21,22,33
,35,40
Power supply input (+)
Power supply input (-)
UART
UART_RXD
UART_TXD
I
O
37
39
UART RX DATA
UART TX DATA
NC
RESERVED
-
1,2,5,6,7,8,9,10
,13,14,15,23,24
,25,26
Reserved pins. Please leave these unconnected