Sim800 hardware design v1.05
Table Of Contents
- Version History
- 1. Introduction
- 2. SIM800 Overview
- 3. Package Information
- 4. Application Interface
- 4.1. Power Supply
- 4.2. Power on/down SIM800
- 4.3. Power Saving Mode
- 4.4. RTC Backup
- 4.5. Serial Port and USB Interface
- 4.6. RI Behaviors
- 4.7. Audio Interfaces
- 4.8. Bluetooth
- 4.9. SIM Card Interface
- 4.10. PCM Interface
- 4.11. Keypad Interface
- 4.12. I2C BUS
- 4.13. General Purpose Input/Output (GPIO)
- 4.14. ADC
- 4.15. PWM
- 4.16. Network Status Indication
- 4.17. Operating Status Indication
- 4.18. KPLED
- 4.19. RF Synchronization Signal
- 4.20. Antenna Interface
- 5. PCB Layout
- 6. Electrical, Reliability and Radio Characteristics
- 6.1 Absolute Maximum Ratings
- 6.2 Recommended Operating Conditions
- 6.3 Digital Interface Characteristics
- 6.4 SIM Card Interface Characteristics
- 6.5 SIM_VDD Characteristics
- 6.6 VDD_EXT Characteristics
- 6.7 VRTC Characteristics
- 6.8 Current Consumption (VBAT=4V)
- 6.9 Electro-Static Discharge
- 6.10 Radio Characteristics
- 6.11 Module RF Receive Sensitivity
- 6.12 Module Operating Frequencies
- 7. Manufacturing
- 8. Appendix
Smart Machine Smart Decision
Figure 42: Keypad detected
Table 22: Pin definition of the keypad interface
Name Pin Function Default state
COL0 51 Pull up
COL1 50 Pull down
COL2 49 Pull down
COL3 48 Pull down
COL4 47
Keypad matrix column
Pull down
ROW0 44 Pull down
ROW1 43 Pull down
ROW2 42 Pull down
ROW3 41 Pull down
ROW4 40
Keypad matrix row
Pull down
Table 23: Keypad multiplex function
Pin name Pin number Mode 0(default) Mode 1
COL0 51 COL0 GPIO10
COL1 50 COL1 GPIO9
COL2 49 COL2 GPIO8
COL3 48 COL3 GPIO7
COL4 47 COL4 GPIO6
ROW0 44 ROW0 GPIO5
ROW1 43 ROW1 GPIO4
ROW2 42 ROW2 GPIO3
ROW3 41 ROW3 GPIO2
ROW4 40 ROW4 GPIO1
Note: Multiplex Function need different software version.
SIM800_Hardware Design_V1.05 46 2014-03-25