UPD16434 NEC, UPD16434 Datasheet - Page 30

• Manufacturer Part Number: UPD16434
• Description: 1/8/ 1/16 DUTY LCD CONTROLLER/DRIVER
• Manufacturer: NEC

30
5.2 Reduction in Current Consumption by RESET Signal
network connected across V
the STOP mode or when it is being reset. Therefore, for a system to which reducing the current draw is extremely
important, the current path thorough the resistor network must be cut off by an external circuit, when no displaying is
performed, to eliminate unnecessary current flow.
using the the RESET signal level instead of the V
Figure 5–5 shows a circuit which cuts off the current to the resistor network during reset state (RESET = high)
If a resistor network is used to supply the LCD drive reference voltage, some current is drained by the resistor
R1 =
5(V
DD
V
LCD
V
LCD
Remark The power to the CPU and the
)
Figure 5–5. Example of Controlling Current Path Using RESET Signal
R2 (16-time-divisions)
CPU
DD
and V
Output port
SS
when no display operation is performed, such as when the
V
DD
Data Sheet S10299EJ4V0DS00
SS
level.
V
DD
PD16434 must be from the same source.
V
V
V
V
V
V
RESET
DD
LC1
LC2
LC3
LC4
LC5
(V
LC0
)
PD16434
PD16434 is in
PD16434