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
KBC4 47 Pull up
KBR0 44 Pull down
KBR1 43 Pull down
KBR2 42 Pull down
KBR3 41 Pull down
KBR4 40
Keypad matrix row
Pull down
4.9.1 Keypad Multiplexing Function
Table 25: Keypad multiplexing function
Pin name Pin number Mode 0(default) Mode 1
KBC0 51 KBC0 GPIO30
KBC1 50 KBC1 GPIO29
KBC2 49 KBC2 GPIO28
KBC3 48 KBC3 GPIO27
KBC4 47 KBC4 GPIO26
KBR0 44 KBR0 GPIO21
KBR1 43 KBR1 GPIO22
KBR2 42 KBR2 GPIO23
KBR3 41 KBR3 GPIO24
KBR4 40 KBR4 GPIO25
Note: Multiplexing function needs different software supply.
4.10. I2C Bus
The SIM2000S provides an I
2
C interface which is only used in the embedded AT application.
Table 26: Pin definition of the I
2
C
Pin name Pin number Description
SCL 38 I2C serial bus clock
SDA 37 I2C serial bus data
Note: The I2C bus should be pulled to 1.8V externally.
4.10.1 I2C Multiplexing Function
Table 27: I2C multiplexing function
Pin name Pin number Mode 0(default) Mode 1
SCL 38 SCL GPIO20
SDA 37 SDA GPIO19
Note: Multiplexing function need different software supply.
SIM2000S_Hardware_Design_V1.00 39 2014-02-27