SIM Tech SimCom SIM340, Проектирование аппаратного обеспечения

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SIM340 Hardware Design
Modify the overview of operating modes
Modify the MIC input characteristics
Modify the BUZZER & NETLIGHT reference circuit
Add the note in the chapter of the Serial Interfaces
about RTS connected to GND
2007-07-31 03.06 Modify the current of VDD_EXT to 10mA.
Modify the range of autobauding as 4800-115200bps.
Add the function of over-voltage automatic shutdown.
Add the chapter 2.2, the chapter 2.3, the chapter 3.13,
the chapter 6.3.2 (add the description of JXT
210-106001-001
connector).
Add the figure 1, 2, 4, 6, 7, 20, 30, 35, 38 and the table
9, 19.
Modify the figure 9: Timing of turning off system
(pulldown time of the PWRKEY from 1s-2s to 2s-3s),
figure 5, figure 10, and table 20: ADC specification.
Anthony.Yang
2007-09-05 03.07 Add order information
Add why we used SIM340 on SIM300-EVB.
chenbo
2007-10-26 03.08 Modify the figure 9: Timing of turning off system
(pulldown time of the PWRKEY from 2s-3s to
0.5s-1s)
Add notes about Restricted operation
anyong
2008-03-13 03.09 Firmware upgrade to R16 platform.
Add AMR Speech codec mode and delete ECHO
suppression in the audio feature column.
Modify the duration of DTR low level that wakes up
the module from sleep mode.
Modify the behaviours of RI.
Modify RF connector type MM9329-2700B to
MM9329-2700RA1
Add notes that LCD display interface function is
option.
Add notes that keypad interface function is option.
Add notes that GPIO0 function is option.
Lvning
2009-3-18 03.09 Modify Figure 1: delete ghost KROW4 key.
SIM340_HD_V3.09 18.03.2009
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