Specifications

TC35 / TC37 Hardware Interface Description
TC35_37_HD_02_V03.10 - Released Page 37/92 21.12.2001
3.3.5 Summary of state transitions
Table 10: State transitions of TC35 / TC37
The table shows how to proceed from one mode to another (gray column = present mode, white columns = intended modes)
Further mode èèè
Present mode
Power Down Normal mode
**)
Charge-only mode
*)
Charging in normal
mode
*)**)
Alarm mode
Power Down mode
without charger
--- /IGT >100 ms at low
level
Connect charger to
POWER (high level at
POWER)
No direct transition, but
via “Charge-only mode” or
“Normal mode”
Wake-up from Power
Down mode (if activated
with AT+CALA)
Power Down mode
with charger (high
level at POWER pins)
--- /IGT (if supply voltage is
above 3.0V). No auto-
matic transition, but via
Power Down mode
without charger
100ms < /IGT < 500ms
at low level
/IGT >1 s at low level Wake-up from Power
Down mode (if activated
with AT+CALA)
Normal mode
**)
AT^SMSO
or
exceptionally /PD pin
> 3.5 s at low level
--- No automatic transition,
but via “Power Down”
Connect charger to
POWER (high level at
POWER)
AT+CALA followed by
AT^SMSO. Module
enters Alarm mode when
specified time is reached.
Charge-only mode
*)
Disconnect charger
(POWER at low level)
or AT^SMSO or
exceptionally /PD pin
>3.5 s at low level
No automatic transition,
but via “Charge in
Normal mode”
--- /IGT >1 s at low level AT+CALA followed by
AT^SMSO. Module
enters Alarm mode when
specified time is reached
and V
BATT+
<3.3V
Charging in normal
mode
*) **)
Via “Charge-only mode”
or exceptionally /PD
pin > 3.5 s at low level
Disconnect charger
from POWER
AT^SMSO --- No direct transition
Alarm mode AT^SMSO or
exceptionally /PD pin
> 3.5 s at low level
/IGT >100 ms at low
level
No transition /IGT >100 ms at low level ---
*)
See Chapter 3.2.2.1 for details on the charging mode
**)
Normal mode covers TALK, IDLE and SLEEP modes