FEDL9092-01
OKI Semiconductor
ML9092-01/02/03/04
Flowchart for Setting the Standby Mode and Releasing the Standby Setting with KREQ by Key Input
(Applies to the ML9092-03/04)
Normal operaton
Make a setting for control
Setting of STB and DISP
register 2
LCD driving voltage: OFF
Turn external power supply (VHIN) OFF
Pull VHIN and V0 to the VSS level
or put them into a floating state.
Standby state
Standby state
Key input
NO
KREQ output =
“H” level ?
YES
Make a setting for control
Release STB.
register 2
LCD driving voltage: ON
Turn external power supply (VHIN) ON
Make a setting for control register
2 again
Make a setting of INC, WLS, KT,
SHL, BE, PE, DTY1, and DTY0
again
Make a setting for port register A
and display data RAM again
according to the specification.
Make a setting for registers
again
NO
Is initial screen
data input
complete?
YES
Set DISP of control register 2 to
“1”
Displaying of initial screen started
Settings completed
60/66
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