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3. Interface
3.2 Pin description
1, 2, 3, 4, 5, 6, 9,
10, 13, 14, 15, 17
NC
, 23, 24, 25, 26, 3
V_BATT
GND
21, 22, 33, 34, 40
Audio
PCM
UART2
(DM Port)
USB
(USB2.0)
User Interface
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Pin NO.
Signal Name
8
31, 32
16
PCM_3.3V_TXD
18
PCM_3.3V_RXD
19
PCM_3.3V_CLK
20
PCM_3.3V_SYNC
37
UART_RXD
39
UART_TXD
7
UART_RFR
8
UART_CTS
29
USB_VBUS
35
USB_D+
36
11
BOOT_OK
12
27
96H_END
28
RESET_IN
30
ACC_ON_SLEEP
Table 1. Pin descriptions
NC
POWER
GND
USB_D-
MSG
In/Out
POWER
GND
O
PCM DATA OUT
I
PCM DATA IN
I
PCM CLK
I
PCM SYNC
I
UART RX DATA
O
UART TX DATA
O
UART ready-for-receive
I
UART clear-to-send
Power supply for the
I
USB transceiver
I/O
USB differential data (+)
I/O
USB differential data (-)
Modem Booting Completion
O
/ Modem Wake Up
Received emergency
O
message from Center
Signified in 96 hours
O
standby mode ending
Modem Hardware reset
I
input
Modem Power ON
I
/ Modem POWER Sleep
Function
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