User's Manual
Table Of Contents
- 1. Introduction
- 2. General Description
- 3. Simplified Block Diagram
- 4. Key Features
- 5. Product Specifications
- 6. Application Interface
- 7. Mounting the Module onto the Application Board
- 8. Package
- 9. Terms and Abbreviations
Neo_M680 Hardware User Guide V1.0
Copyright Neoway Techlology Co., Ltd. Page 23 of 31
sleep mode.
5) Pull DTR high, the module will exit from sleep mode actively, and furthermore enable the
UART. Thus the voice call, received data, or SMS can be processed through UART. After
processing finished pull it low again, to take the module back to sleep mode.
6.4.2 RING
1) Once the incoming voice call, the module sends out “ring” message through UART and
meanwhile outputs 250mS low pulses at 4S period on RING signal. See Figure 14.
Figure 14 RING indicator for incoming call
2) Upon receipt of SMS, the module outputs one 600mS low pulse. See Figure 15.
Figure 15 RING Indicator for SMS
6.5 SIM interface
Table 5 SIM Interface
Signal I/O Function Note
VSIM PWR SIM supply voltage 1.8/3.0V
SIM_CLK
DO
SIM clock
SIM_RST DO SIM reset
SIM_DATA
DIO
SIM data
Internal pull up