Hardware Design V1.00
Table Of Contents
- Version History
- 1. Introduction
- 2. SIM2000S Overview
- 3. Package Information
- 4. Application Interface
- 4.1. Power Supply
- 4.2. Power on/down Scenarios
- 4.3. Power Saving Mode
- 4.4. Serial Port and Debug Interface
- 4.5. RI behaviors
- 4.6. Audio Interfaces
- 4.7. RUIM Card Interface
- 4.8. PCM Interface
- 4.9. Keypad Interface
- 4.10. I2C Bus
- 4.11. General Purpose Input/Output (GPIO)
- 4.12. ADC
- 4.13. PWM
- 4.14. Network Status Indication
- 4.15. NETLIGHT Multiplexing Function
- 4.16. Operating Status Indication
- 4.17. Antenna Interface
- 5. PCB Layout
- 6. Electrical, Reliability and Radio Characteristics
- 7. Manufacturing
- 8. Appendix
Smart Machine Smart Decision
SIM2000S_Hardware_Design_V1.00 28 2014-02-27
Table 9: VBUS operation voltage
Pin
Min Typ Max Unit
VBUS
4.4 5 5.5 V
4.4.4 Software Upgrade and Debug
Customer could upgrade module’s firmware through USB.
If upgrading through USB port, it is necessary to power on SIM2000S first, and then connect VBUS, USB_DP,
USB_DM, and GND to PC. User should press the PWRKEY button before PC could detect USB port and could
communicate normally with USB_DP and USB_DM, then user should press the start button, the module will
enter download mode.
4.4.5 Multiplexing function of serial port and SD interface
If full modem is not necessary, it could be multiplexed with GPIO port, the details could be found in the
following table:
Table 10: Multiplexing function of serial port
Pin name Pin number Mode 0(default) Mode 1
DTR 3 DTR GPIO1
RI 4 RI GPIO2
DCD 5 DCD GPIO3
CTS 7 CTS GPIO4
RTS 8 RTS GPIO5
TXD 9 TXD GPIO6
RXD 10 RXD GPIO7
Note: Multiplexing function need different software supply. If user wants this function, the firmware must be
customized. Please contact SIMCom for more details.
Table 11: Multiplexing function of SD interface
Pin name Pin number Mode 0(default) Mode 1 Mode 2
DTR 3 DTR GPIO1 SDCC_CLK
DBG_TXD 27 DBG_TXD GPIO12 SDCC_DATA_0
RI 4 RI GPIO2 SDCC_DATA_1
DBG_RXD 28 DBG_RXD GPIO13 SDCC_DATA_2
DCD 5 DCD GPIO3 SDCC_DATA_3
PWM 35 PWM GPIO18 SDCC_PWR_EN
STATUS 66 STATUS GPIO32 SDCC_CMD
4.5. RI behaviors
Table 12: RI behaviors