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TC65 Hardware Interface Description
Strictly confidential / Draft
s
TC65_HD_V00.521
Page 31 of 99
24.05.2005
VEXT
See note 1
TXD0/TXD1/RTS0/RTS1/DTR0 (driven by the application)
Serial interfaces
ASC0 and ASC1
Undefined
Active
PWR_IND
CTS0/CTS1/DSR0/DTR0
Figure 7: Signal states during turn-off procedure
Note 1: Depending on capacitance load from host application
3.3.2.2
Leakage Current in Power Down Mode
The leakage current in Power Down mode varies depending on the following conditions:
•
If the supply voltage at BATT+ was disconnected and then applied again without starting
up the TC65 module, the leakage current ranges between 90µA and 100µA.
•
If the TC65 module is started and afterwards powered down with AT^SMSO, then the
leakage current is only 50µA.
Therefore, in order to minimize the leakage current take care to start up the module at least
once before it is powered down.