ES51922 application circuit from ES51922 datasheet:
In UT61E1 some features of ES51922 are not used and can be enabled by simple hardware diy:
112 APOSEL I Idle time selection for auto power off feature.
58 SLEEP O Sleep mode indicator, asserts low in SLEEP mode.
105 BKOUT O If BKLIT function is enabled, this pin will change from –3V to +3V
For 60 sec, once press BKLIT pin again within 60 sec, this pin will
Change back to –3V
102 BKLIT I Back light function. Pulse low to set BKOUT pin output.
113 BKSEL I Set to V- to change the backlight idle time from 60 sec. to 180 sec.