HM17CM256 HYNIX [Hynix Semiconductor], HM17CM256 Datasheet - Page 71

• Manufacturer Part Number: HM17CM256
• Description: 128XRGBX82 OUTPUT LCD DRIVER IC with built-in RAM
• Manufacturer: HYNIX [Hynix Semiconductor]

(34-22) Discharge control
(34-21) Oscillator circuit Rf control
( reset {FFL, Rf
( reset
CS
CS
0
0
determined by the resistor value.
to capacitor setting example.
The feedback resistance of oscillator circuit can be changed by setting this register.
The frame frequency is changed according to the frequency of oscillator, and the oscillation frequency is
When you set the frame rate, please check the state of LCD display.
FFL command Setting oscillator frequency ( frame frequency f
* The value of typical frame frequency f
The capacitors connected between V
RS
RS
1
1
{DIS}=0
FFL=0
FFL=1
DIS=”0”
DIS=”1”
RD
RD
1
1
H
2
, Rf
, read address
Display mode : variable gradation display
1/82 Duty
{Rf
WR
WR
1
2
normal oscillator frequency ( set frame frequency, f
high speed oscillator frequency ( set frame frequency, f
, Rf
0
0
, Rf
discharge stop
start discharge
Rf
0
0
0
0
1
1
1
1
0
1
2
}=0
, Rf
RE
RE
0
1
H
0
, read address : D
Rf
2
2
}=0
0
0
1
1
0
0
1
1
1
H
RE
RE
E
0
0
H
) * : “Don’t care”
1
1
Rf
0
1
0
1
0
1
0
1
0
RE
RE
LCD
0
0
0
0
FLM
~V
4
Typ is under following condition.
H
)
and V
Feedback resistance size
0.8 x reference value
0.9 x reference value
1.1 x reference value
1.2 x reference value
D
D
1
1
7
7
Reference value
SS
forbidden
forbidden
forbidden
can be discharged by this control.
D
D
1
1
6
6
D
D
0
1
FLM
5
5
). ( refer to DC characteristic )
FLM
D
D
1
0
4
4
to 73Hz(Typ))
FLM
FFL
to 150Hz(Typ))
D
D
*
3
3
HM17CM256
Rf
D
D
*
2
2
2
Rf
D
D
*
1
1
1
Please refer
DIS
Rf
D
D
0
0
0
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