User's Manual

MC55/56 Hardware Interface Description
Confidential / Preliminary
s
MC55/56_hd_v03.00 Page 49 of 104 16.08.2005
3.7 Summary of state transitions (except SLEEP mode)
Table 12: State transitions of MC55/56 (except SLEEP mode)
The table shows how to proceed from one mode to another (grey column = present mode, white columns = intended modes)
Further mode ÎÎÎ
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
input of ext. charging
circuit and POWER pin
(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 of MC55/56)
--- /IGT >1 s at low level,
if battery is fully
charged
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 /EMERGOFF
pin > 3.2s at low level
--- No automatic transition,
but via “POWER
DOWN”
Connect charger to
POWER pin at MC55/56
(high level at POWER)
AT+CALA followed by
AT^SMSO. MC55/56
enters Alarm mode when
specified time is reached.
Charge-only mode
*)
Disconnect charger
(MC55/56 POWER pin at
low level)
or
AT^SMSO or
exceptionally /EMERGOFF
pin >
3.2s at low level
No automatic
transition, but via
“Charge in Normal
mode”
--- /IGT >1s at low level AT+CALA followed by
AT^SMSO. MC55/56
enters Alarm mode when
specified time is reached
and V
BATT+
>3.2V
Charging in normal
mode
*) **)
AT^SMSO Î “Charge-
only mode”, again
AT^SMSO;
or
exceptionally /EMERG-
OFF pin >3.2s at low level
Disconnect charger
from input of ext.
charging circuit and
module’s POWER pin
AT^SMSO --- No direct transition
Alarm mode AT^SMSO or
exceptionally /EMERGOFF
pin >
3.2s at low level
/IGT >100ms at low
level
AT^SMSO if charger is
connected
/IGT >100ms at low level ---
*)
See Chapter 3.5.3 for details on the charging mode
**)
Normal mode covers TALK, DATA, GPRS, IDLE and SLEEP modes