NJU6676 New Japan Radio Co., Ltd., NJU6676 Datasheet - Page 14

• Manufacturer Part Number: NJU6676
• Description: 64-Common x 132-Segment plus 1-Icon Bit Map Type LCD Controller and Driver
• Manufacturer: New Japan Radio Co., Ltd.

f) Oscillator
This is the low power consumption CR oscillator which provides the display clock and voltage
converter-timing clock.
e) Internal power circuits
The internal power circuits are composed of x4 boost voltage converter, output voltage regulator
including 64-step EVR and voltage followers.
The optimum values of the external passive components for the internal power circuits, such as
capacitors for V1 to V5 terminals and feed back resistors for VR terminal, depend on LCD panel size.
Therefore, it is necessary to evaluate the actual LCD module with these external components in
order to determine the optimum values.
Each portion of the internal power circuits is controlled by “power control set” instruction as shown in
Table.1. In addition, the combination of power supply circuits is described in Table.2.
Table.1) Power control set
Table.2) Power supply combinations
Note1) Capacitor input terminals: C1+, C1-, C2+, C2-, C3-
Note2) Do not use other combinations except examples in Table.2.
Note3) Connect decoupling capacitors on V1 to V5 terminals whenever using the voltage followers.
Bits
D2
D1
D0
Using all internal power circuits
Using voltage regulator and
Voltage followers
Using voltage followers
Using only external power supply
Voltage converter
Voltage regulator
Voltage followers
Status
Portions
D2
1
0
0
0
D1
1
1
0
0
D0
1
1
1
0
converter
Voltage
On
Off
Off
Off
1 :On
1 :On
1 :On
regulator
Voltage
Status
On
On
Off
Off
0: Off
0: Off
0: Off
followers
Voltage
On
On
On
Off
V5, Vss2
PRELIMINARY
External
V1 to V5
voltage
Vss2
Vout,
Vss2
NJU6676
terminals
Capacito
Open
Open
Open
Use
r