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8.3. Suspend
8.3.1. Setting the Standby Transition Timeout
The BHT switches to the suspend state when any of the following conditions arises:
(1) When the power is on, the power key is held down for the effective held-down time (for switching to
the suspend state) or more.
(2) An auto power-off timeout occurs after one of the suspend transition prohibited events (listed below)
is completed.
(3) When the power OFF function is called.
8.3.2. Suspend Transition Prohibited Events
The following items are suspend transition prohibited events.
- Key press (other than power key) authentication
- Touch panel tap authentication
- When ActiveSync connection established (IrDA and USB)
- When auto power OFF time is set to "0"
- When the following registry value is set to "0" with a wireless connection established
[HKEY_LOCAL_MACHINE\Comm\CXPort]
"NoIdleTimerReset"=dword : 0
Furthermore, the auto power OFF time is reset upon the occurrence of the following events.
- When a serial communication event occurs (IrDA and USB)
- When the SystemIdleTimerReset() function is executed
- When an event with event object name "PowerManager, ActivityTimer, or UserActivity" is set
8.3.3. Setting the Auto Power-off Timeout
The BHT_SetSysSettingDW (DWORD dwCtrlCode, DWORD dwSysParam) and BHT_GetSysSettingDW
(DWORD dwCtrlCode, DWORD *pdwSysParam) functions write or read the auto power-off timeout as
specified below.
Parameter name
Auto power-off timeout
(sec.)
(When battery-driven)
Auto power-off timeout
(sec.)
(When placed on the CU)
8.3.4. Setting the Effective Held-down Time of the Power Key for Switching to the Suspend State
The BHT_SetSysSettingDW (DWORD dwCtrlCode, DWORD dwSysParam) and BHT_GetSysSettingDW
(DWORD dwCtrlCode, DWORD *pdwSysParam) functions write or read the effective held-down time of
the power key for switching to the suspend state as specified below.
Parameter name
Effective held-down time of the
power key for switching to the
suspend state (in units of 100 msec)
Saving the Registry
If the BHT is switched to the suspend state by pressing the power key with the SF (*1) key held down,
the Registry will be saved into the flash memory.
(*1) Here, this means only the key marked "SF." The Registry will not be saved even if you press the
power key while holding down the magic key to which the SF key function is assigned.
Type
R/W
Control code
BHT_PM
DW
R/W
_BATTPOWEROFF
BHT_PM
DW
R/W
_EXTPOWEROFF
Type
R/W
Control code
BHT_PWRDOWN_KEY
DW
R/W
_WAIT_TIME
Parameter value
0: Disable
1 -
0xFFFFFFFF
0: Disable
1 -
0xFFFFFFFF
Parameter
value
1 - 255
26
Defaults
Validating timing
180
Immediately after
(3 min.)
setting
Immediately after
0
setting
Validating
Defaults
timing
Immediately
5
after setting
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