User Manual

Copyright ⓒ. 2014. All Rights Reserved.
3. Interface
3.2 Pin description
Pin NO. Signal Name In/Out Function
NC
1, 2, 3, 4, 5, 6, 9,
10, 13, 14, 15, 17
, 23, 24, 25, 26, 3
8
NC
V_BATT
31, 32 POWER POWER
GND 21, 22, 33, 34, 40 GND GND
Audio
PCM
16 PCM_3.3V_TXD O PCM DATA OUT
18 PCM_3.3V_RXD I PCM DATA IN
19 PCM_3.3V_CLK I PCM CLK
20 PCM_3.3V_SYNC I PCM SYNC
UART2
(DM Port)
37 UART_RXD I UART RX DATA
39 UART_TXD O UART TX DATA
7 UART_RFR O UART ready-for-receive
8 UART_CTS I UART clear-to-send
USB
(USB2.0)
29 USB_VBUS I
Power supply for the
USB transceiver
35 USB_D+ I/O USB differential data (+)
36 USB_D- I/O USB differential data (-)
User Interface
11 BOOT_OK O
Modem Booting Completion
/ Modem Wake Up
12 MSG O
Received emergency
message from Center
27 96H_END O
Signified in 96 hours
standby mode ending
28 RESET_IN I
Modem Hardware reset
input
30 ACC_ON_SLEEP I
Modem Power ON
/ Modem POWER Sleep
Table 1. Pin descriptions