NJU6682 데이터 시트보기 (PDF) - Japan Radio Corporation
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NJU6682 Datasheet PDF : 58 Pages
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NJU6682
1-9-8)Oscillation Circuits
The Oscillation Circuit is a low power CR oscillator incorporating with a Resistor and a Capacitor. it generates clocks
for display timing signal source and the clock for step up circuits for LCD driving. The oscillation circuit output
frequency is divided as display clock CL.
Table 3
Duty
1/4
1/8 1/12 1/16 1/20 1/24 1/28 1/32 1/36 1/40 1/44, 1/48 1/52, 1/56
Divide
1/1200 1/600 1/400 1/300 1/240 1/200 1/170 1/150 1/135 1/120
1/105
1/90
Duty
Divide
Duty
Divide
1/60, 1/64, 1/68
1/75
1/72, 1/76, 1/80, 1/84, 1/88
1/60
1/92, 1/96, 1/100, 1/104, 1/108, 1/112, 1/116, 1/120
1/45
1/124, 1/128, 1/132, 1/136, 1/140, 1/144, 1/148, 1/152, 1/156, 1/160
1/30
1-9-9)Power Supply Circuits
Internal Power Supply Circuit generates voltage for LCD driving. The power supply circuits consists of Step Up
Circuits ( 2 times to 7 times ), Regulator Circuits, and Voltage Followers. The internal Power Supply is designed for
small size LCD panel, therefore it is not suitable for the large size LCD panel application, please supply the external.
The suitable value of the capacitors connecting to the V1 to V5 terminals and the step up circuit, and the feedback
resistors for V5 operational amplifier depend on the LCD panel. And the power consumption with the LCD panel is
depending on the display pattern. Please evaluate with actual LCD module.
The operation of Internal Power Supply Circuits is controlled by the Internal Power Supply Control Instruction.
(R/W)
A0 RD WR D15 D14 D13 D12 D11 D10 D9 D8 D7 D6 D5 D4 D3 D2 D1 D0
0
1
0
0
0
0
1
0
0
0
1
*
*
*
*
* DC VR VF
*:Don’t Care
DC : Step Up Circuit
DC=1 : Step Up Circuit ON
DC=0 : Step Up Circuit OFF ( In this time, terminals C1+,C1-,C2+,C2-,C3-,C4-,C5- and C6- should be open, and
VOUT should be supplied from outside. )
VR : Regulator Circuit
VR=1 : Regulator Circuit ON
VR=0 : Regulator Circuit OFF ( In this time, terminal VR should be open, and V5 should be supplied from outside. )
VF : Voltage Follower
VR=1 : Voltage Follower ON
VR=0 : Voltage Follower OFF ( In this time, terminals V1 to V5 should be supplied from outside. )
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