Specifications

4.3. Setting the Backlight Illumination Time
The backlight illumination time is set and read using the
BHT_SetSysSettingDW (DWORD dwCtrlCode,DWORD dwSysParam) and
BHT_GetSysSettingDW (DWORD dwCtrlCode,DWORD *pdwSysParam) functions.
Parameter Type R/W
Control Code
(dwCtrlCode)
Parameter Value
(dwSysParam)
Default Validation Timing
Illumination time
when powered
by battery (sec.)
DW R/W
BHT_BACKLIGHT
_BATT_TIME
0 - 255
0: Backlight OFF
255: Continuously ON
3
When backlight
illumination timer is
next reset
Illumination time
when placed on
CU (sec.)
DW R/W
BHT_BACKLIGHT
_AC_TIME
0 - 255
0: Backlight OFF
255: Continuously ON
60
When backlight
illumination timer is
next reset
4.4. Setting the Backlight Brightness and Power Saving Mode
The backlight brightness and power saving mode are set and read using the
BHT_SetSysSettingDW (DWORD dwCtrlCode,DWORD dwSysParam) and
BHT_GetSysSettingDW (DWORD dwCtrlCode,DWORD *pdwSysParam) functions.
Parameter Type R/W
Control Code
(dwCtrlCode)
Parameter Value
(dwSysParam)
Default Validation Timing
Backlight
brightness
DW R/W
BHT_BACKLIGHT
_BRIGHTNESS
0: OFF
1: Dark
2: Bright (low)
3: Bright (high)
3
When the backlight is
next turned ON
Backlight power
saving mode
DW R/W
BHT_BACKLIGHT
_POWERSAVE
0: OFF
1: Dim
1
When backlight
illumination status is
set to power saving
mode first after
setting
6