Version History - SimCom SIM900D Hardware Design

Version History

Date Version
2010-03-31 1.01
2010-04-09 1.02
2010-06-24 1.03
2010-10-09 1.04
2011-04-01 2.00
2012-02-23 2.01
2012-05-07 2.02
SIM900_Hardware Design_V2.02
Description of change
Origin
Changed GHOST mode to Charge-only mode
§3.4.1.1Update the Figure8: Timing of turn on system
using PWRKEY
§3.4.2.1Update the Figure9: Timing of turn off system
using PWRKEY
§4.2Update the Table25: SIM900D conducted RF
receive sensitivity
§3.8, Modify the VRTC pin connection when backup is
not needed.
§2.1, §3.3. §3.4 Modify the power supply range from
3.4V~4.5V to 3.1V~4.8V.
§3.4.1.1Update the Figure8: Timing of turn on system
using PWRKEY
Modify the power supply range to 3.2V~4.8V.
§3.3.2 Add Figure6: The minimal VBAT voltage at
VBAT drop
§3.4 Modified figure7，figure8，figure11.
§3.6 Add 3.6.4 and 3.6.5 description.
§3.11.1 Update the Figure25
§3.7 Update the Figure13
Arrange the structure of document.
Modify chapter6 Manufacturing
Add illustration of SIM900 module information and
some notes in chapter 5.
Modify §6
Add some notes in chapter 5.
7
Smart Machine Smart Decision
Author
Jing.zhou
Jing.zhou
Jing.zhou
Jing.zhou
Jing.zhou
Juntao.zhao
Juntao.zhao
2012-05-07