Q2686 Wavecom, Q2686 Datasheet - Page 53

• Manufacturer Part Number: Q2686
• Description: Wireless CPU
• Manufacturer: Wavecom

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The duration of the firmware power-up sequence depends on:
Other factors have a minor influence
The
command or WIND indicators: the application must detect the end of the
power-up initialization and de-assert ON/~OFF afterwards.
•
•
Note:
1
initialisation phase.
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prior written agreement.
WM_PRJ_Q2686_PTS_001-007
If the application manages hardware flow control, the AT command can be sent during the
I
BB+RF
•
•
•
•
Send an “AT” command and wait for the “OK” answer: once the
initialization is complete the AT interface answers « OK » to “AT” message
Wait for the “+WIND: 3” message: after initialization, the Wireless CPU
configured to do so, will return an unsolicited “+WIND: 3” message. The
generation of this message is enabled or disabled via an AT command.
recommended
these commands.
See also “AT Commands Interface Guide” [7] for more information on
= overall current consumption (Base Band + RF part)
the need to perform a recovery sequence if the power has been lost
during a flash memory modification.
the number of parameters stored in EEPROM by the AT commands
received so far
the ageing of the hardware components, especially the flash memory
the temperature conditions
Figure 7: Power-ON sequence (no PIN code activated)
STATE OF THE
Wireless CPU
POWER SUPPLY
INTERNAL RST
confidential ©
way to de-assert the ON/~OFF signal is to use either an AT
ON/OFF
®
Wireless CPU
I
BB+RF
OFF
< 22μA
®
T
(40ms typ)
I
rst
RESET mode
BB+RF
T
(2000ms min)
SIM and Network dependent
on/off-hold
=20 to 40mA
Wireless CPU
Q2686 Wireless CPU
I
BB+RF
ON
<120mA
®
AT answers « OK »
Wireless CPU
READY
Interfaces
®
March 6, 2007
Page: 52 / 87
®
, if
1
.
®