UPD16680 NEC, UPD16680 Datasheet - Page 14

• Manufacturer Part Number: UPD16680
• Description: 1/53/ 1/40 DUTY/ LCD CONTROLLER/DRIVER WITH BUILT-IN RAM
• Manufacturer: NEC

5.4 Setting BIAS value
bias value can be set from the 1/6 bias, the 1/7 bias, the 1/8 bias.
1/8 bias
1/7 bias
1/6 bias
5.5 Voltage followers for level power supply
Caution When using this mode without connecting capacitor, the display dignity will be bad.
14
By the input of AMP
When internal driving circuit chosen, by connecting the interval of the pin V
condenser charging. In this mode, it needs to connect the external capacitor ( 0.1 to 1.0 F ) for the level stability.
doesn't need to connect the external capacitor for the level stability.
LCD driving mode ( AMP
Level capacitor mode ( AMP
Bias value
When this mode is chosen, The voltage follower maximizes electric current supply ability for the external
When this mode is chosen, The voltage follower maximizes electric current supply ability for LCD drive. It
CHA
pin, it controls voltage follower for the LCD drive level power supply.
V
To connect V
To connect V
LCBS1
CHA
, V
LCBS2
CHA
= L )
= H )
, V
LCBS1
LCBS1
LCBS3
and V
and V
Pin connection
All open
Data Sheet S12694EJ2V0DS00
LCBS2
LCBS3
, or V
, V
LCBS2
LCBS2
is open.
and V
LCBS3
LCBS1
, V
LCBS2
, V
LCBS3
outside the IC, the
PD16680