Hardware Design V1.01(091226)
Table Of Contents
- Contents
- Version history
- 1 Introduction
- 2 SIM900 Overview
- 3 Application Interface
- 3.1 SIM900 Pin Description
- 3.2 Operating Modes
- 3.3 Power Supply
- 3.4 Power Up and Power Down Scenarios
- 3.5 Power Saving
- 3.6 Summary of State Transitions (except SLEEP mode)
- 3.7 RTC Backup
- 3.8 Serial Interfaces
- 3.9 Audio Interfaces
- 3.10 SIM Card Interface
- 3.11 LCD Display Interface
- 3.12 Keypad Interface
- 3.13 ADC
- 3.14 Behaviors of the RI
- 3.15 Network Status Indication
- 3.16 General Purpose Input Output (GPIO)
- 3.17 External Reset
- 3.18 PWM
- 3.19 I2C Bus
- 4 Antenna Interface
- 5 Electrical, Reliability and Radio Characteristics
- 6 Mechanics
SIM900 Hardware Design
Voltage drop
during transmit
burst
Normal condition, power control level for
Pout max
400 mV
Voltage ripple Normal condition, power control level for
Pout max
@ f<200kHz
@ f>200kHz
50
2
mV
POWER DOWN mode
SLEEP mode
30
1.5
uA
mA
IDLE mode
GSM 850
EGSM 900
DCS1800
PCS1900
22
22
22
22
mA
TALK mode
GSM 850
EGSM 900
DCS1800
PCS1900
235
241
158
166
mA
DATA mode, GPRS (3 Rx,2Tx)
GSM 850
EGSM 900
DCS1800
PCS1900
435
444
287
299
mA
I
VBAT
Average supply
current
DATA mode, GPRS (4 Rx,1Tx)
GSM 850
EGSM 900
DCS1800
PCS1900
266
270
191
202
mA
Peak supply
current (during
Tx
burst)
Power control level for Pout max. 2.0 A
5.4 Current Consumption
Please refer to the following table for the values of current consumption.
SIM900_HD_V1.01 26.12.2009
50