ST7637 Datasheet, PDF (209/210 Pages) Sitronix Technology Co., Ltd. – 65K 132x132 Color Dot Matrix LCD Controller/Driver

ST7637
A6- selection of application voltage
Vop requirement: [Vdda x BS x BE] ≧ Vop
BS is Vop booster stage and BE is booster efficiency. Referential values are listed
below: (assume Vdda=2.8V, Vop booster stage=x8)
n-line setting=0x00: BE=77%
n-line setting=0x01: BE=66%
n-line setting=0x06: BE=74%
actual BE should be determined by adding module loading and ITO resistance value.
Vdda<3V: 3V≦Vg≦2xVdda, Vdda≧3V: 1.8V≦Vg≦2xVdda.
Vm=Vg/2 and 0.7V<Vm<Vdda-0.7V.
The worst condition should be considered:
Low temperature effect and display on with gray pattern on panel.
Referential LCD module setting
Condition:Vdda=2.8V, Vop booster stage=x8, booster level=level 2, duty=1/132, panel
size=1.5”
bias
Vop (n-line=0x00)
Vop (n-line=0x01)
Vop (n-line=0x06)
1/10
15V~17.24V
14.78V
15V~16.57V
1/9
13.5V~17.24V
13.5V~14.78V
13.5V~16.57V
Note:it is recommended to reserve some range for user adjustment and temperature effect.
Ver 1.6
209/210
2009/03