Version History - SimCom SIM900D Hardware Design

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
SIM900D_Hardware Design_V1.04
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
Author
Jing.zhou
Jing.zhou
Jing.zhou
Jing.zhou
7
2010.10.09