hardware design v1 00 2
Table Of Contents
- Contents
- Version History
- 1 Introduction
- 2 SIM900R Overview
- 3 Package Information
- 4 Application Interface
- 4.1 Power Supply
- 4.2 Power on/down Scenarios
- 4.3 Power Saving Mode
- 4.4 RTC Backup
- 4.5 Serial Interfaces
- 4.6 Audio Interfaces
- 4.7 SIM Card Interface
- 4.8 LCD Display/SPI Interface
- 4.9 Keypad Interface
- 4.10 ADC
- 4.11 RI Behaviours
- 4.12 Network Status Indication
- 4.13 General Purpose Input/Output (GPIO)
- 4.14 External Reset
- 4.15 PWM
- 4.16 I2C Bus
- 4.17 Antenna Interface
- 5 Electrical, Reliability and Radio Characteristics
- 5.1 Absolute Maximum Ratings
- 5.2 Recommended Operating Conditions
- 5.3 Digital Interface Characteristics
- 5.4 SIM Card Interface Characteristics
- 5.5 VDD_EXT Characteristics
- 5.6 SIM_VDD Characteristics
- 5.7 VRTC Characteristics
- 5.8 Current Consumption (VBAT = 3.8V)
- 5.9 Electro-Static Discharge
- 5.10 Radio Characteristics
- 6 Manufacturing
- Appendix
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SIM900R_Hardware Design_V1.00 38 2012-07-20
5.4 SIM Card Interface Characteristics
Table 18: SIM card interface characteristics
Symbol Parameter Min Typ Max Unit
I
IH
High-level input current -10 - 10 uA
I
IL
Low-level input current -10 - 10 uA
1.4 - - V
V
IH
High-level input voltage
2.4 - - V
- - 0.4 V
V
IL
Low-level input voltage
2.4 V
1.7 - - V
V
OH
High-level output voltage
2.7 - - V
- - 0.1 V
V
OL
Low-level output voltage
- - 0.1 V
5.5 VDD_EXT Characteristics
Table 19: VDD_EXT characteristics
Symbol Parameter Min Typ Max Unit
V
O
Output voltage 2.70 2.80 2.95 V
I
O
Output current - - 10 mA
5.6 SIM_VDD Characteristics
Table 20: SIM_VDD characteristics
Symbol Parameter Min Typ Max Unit
2.75 2.9 3.00
V
O
Output voltage
1.65 1.80 1.95
V
I
O
Output current - - 10 mA