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
Smart Machine Smart Decision
SIM900R_Hardware Design_V1.00 39 2012-07-20
5.7 VRTC Characteristics
Table 21: VRTC characteristics
Symbol Parameter Min Typ Max Unit
V
RTC-IN
VRTC input voltage 2.00 3.00 3.15 V
I
RTC-IN
VRTC input current - 2 - uA
V
RTC-OUT
VRTC output voltage - 3.00 - V
I
RTC-OUT
VRTC output current - 10 - uA
5.8 Current Consumption (VBAT = 3.8V)
Table 22: Current consumption
*
Symbol Parameter Conditions Value Unit
I
VRTC
VRTC current VBAT disconnects. Backup battery is 3 V 2 uA
Power down mode 30 uA
BS-PA-MFRMS=9 1.0
BS-PA-MFRMS=5 1.2
Sleep mode
BS-PA-MFRMS=2 1.5
mA
EGSM 900
Idle mode
DCS 1800
22 mA
PCL=5 250
PCL=12 110
EGSM 900
PCL=19 76
PCL=0 168
PCL=7 89
Voice call
DCS 1800
PCL=15 76
mA
PCL=5 240
PCL=12 110
EGSM 900
PCL=19 83
mA
PCL=0 170
PCL=7 95
Data mode
GPRS(1Rx,1Tx)
DCS 1800
PCL=15 80
mA
PCL=5 270
PCL=12 150
EGSM 900
PCL=19 120
mA
PCL=0 205
PCL=7 130
Data mode
GPRS(4Rx,1Tx)
DCS 1800
PCL=15 115
mA
PCL=5 440
I
VBAT
VBAT current
Data mode
GPRS(3Rx,2Tx)
EGSM 900
PCL=12 185
mA