User's Manual
Table Of Contents
- Contents
- Table Index
- Revision History
- 1 Introduction
- 2 Package Information
- 3 Interface Application
- 4 RF Specifications
- 5 Electrical Specifications
- 6 SMT Production Guide
- 7 Packaging
- 空白页面
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SIM7600E-H_User Manual_V1.00 2017-10-11
To
comply with RS-232-C protocol, the
RS-232-C level shifter chip should be used to
connect SIM7600E-H to the RS-232-C interface, for example SP3238ECA, etc.
Note: SIM7600E-H supports the following baud rates: 300, 600, 1200, 2400, 4800, 9600, 19200,
38400, 57600, 115200, 230400, 460800, 921600, 3200000, 3686400, 4000000bps. The default
band rate is 115200bps.
3.3.2 RI and DTR Behavior
The RI pin can be used to interrupt output signal to inform the host controller such as application
CPU.
Normally RI will keep high level until certain conditions such as receiving SMS, or a URC report
coming, and then it will change to low level. It will stay low until the host controller clears the
interrupted event with “AT+CRIRS” AT command.
Idle
HIGH
LOW
Receiving SMS and any
URC report coming.
AT+CFGRI=1
RI
Clear by AT+CRIRS
Idle
HIGH
LOW
Receiving SMS .
AT+CFGRI=0
RI
Clear by AT+CRIRS
Figure 16: RI behaviour（SMS and URC report）