Version History - SimCom SIM900B Hardware Design

Version History

Date Version
2010-04-08 1.01
2010-05-31 1.02
2010-06-23 1.03
2010-08-19 1.04
2011-02-09 2.00
2012-05-07 2.01
2012-05-07 2.01
SIM900_Hardware Design_V2.01
Description of change
Origin
Modify voltage domain ， current consumption and
figure37
§2.1, §3.3. §3.4 Modify the power supply range from
3.2V~4.8V to 3.1V~4.8V
§3.7, Modify the VRTC pin connection when RTC
backup is not needed.
Modify the power supply range to 3.2v~4.8v.
§3.3.2 Add Figure 6:The minimal VBAT voltage at
VBAT drop.
§3.4 Modify figure 7.
§3.4 Add table 7.
§3.5 Add 3.5.4 and 3.5.5 description.
Delete chapter 3.6.
Add figure 29,figure 30,figure 31,figure 32
Modified figure 39 and B2B connector's manufacture
Arrange the structure of document.
Add illustration of SIM900 module information and
some notes in chapter 5.
Add some notes in chapter 4.
7
Smart Machine Smart Decision
Author
Huangqiuju
Huangqiuju
Huangqiuju
Huangqiuju
Huangqiuju
Juntao.zhao
Juntao.zhao
2012-05-07