User's Manual
Table Of Contents
- RF Exposure Statement:
- General Notes
- Copyright
- Contents
- Table Index
- Figure Index
- Revision History
- 1Introduction
- 2Package Information
- 3Interface Application
- 3.1Power Supply
- Figure 5: VBAT voltage drop during burst emission
- 3.1.1Power Supply Design Guide
- Figure 6: Power supply application circuit
- Table 7: Recommended Zener diode list
- 3.1.2Recommended Power Supply Circuit
- Figure 7: Linear regulator reference circuit
- Figure 8: Switching mode power supply reference ci
- 3.1.3Voltage Monitor
- 3.2Power on/Power off/Reset Function
- 3.3UART Interface
- 3.4USB Interface
- 3.5USIM Interface
- 3.6PCM Interface
- 3.7SD Interface
- 3.8I2C Interface
- 3.9SDIO Interface
- 3.10SPI Interface
- 3.11Network status
- 3.12Flight Mode Control
- Switch
- 3.1Power Supply
- 4RF Specifications
- 5Electrical Specifications
- 6SMT Production Guide
- 7Packaging
- Appendix
SIM7600SA-H_User Manual_V1.00
2017-10-11
Smart Machine Smart Decision
Table 10: RESET pin electronic characteristic
Symbol
Description
Min.
Typ.
Max.
Unit
T
reset
The active low level time impulse on RESET pin to
reset module
50
100
500
ms
V
IH
Input high level voltage
1.17
1.8
2.1
V
V
IL
Input low level voltage
-0.3
0
0.8
V
3.3 UART Interface
SIM7600SA-H provides a 7-wire UART (universal asynchronous serial transmission) interface as
DCE (Data Communication Equipment). AT commands and data transmission can be performed
through UART interface.
3.3.1 UART Design Guide
The following figures show the reference design.
MODULE
( DCE)
HOST
( DTE)
TXD
RXD
UART
RTS
CTS
DTR
DCD
RI
TXD
RXD
RTS
CTS
DTR
DCD
RING
UART
Figure 13: UART full modem
MODULE
( DCE)
HOST
( DTE)
TXD
RXD
RTS
UART
CTS
DTR
DCD
RI
TXD
RXD
RTS
CTS
DTR
DCD
RING
UART
Wake up host
Interrupt
Figure 14: UART null modem
The SIM7600SA-H UART is 1.8V voltage interface. If user’s UART application circuit is 3.3V
voltage interface, the level shifter circuits should be used for voltage matching. The