sh66k51a SinoWealth Micro-Electronics Corp. Ltd, sh66k51a Datasheet - Page 26

• Manufacturer Part Number: sh66k51a
• Description: 2k 4-bit Micro-controller With Lcd Driver
• Manufacturer: SinoWealth Micro-Electronics Corp. Ltd

LCD Power
* When LCD is off, COM & SEG output GND in LCD application.
SH66K51A built in a voltage regulator and it can generate a stable voltage for LCD when V
The following is the application diagram for LCD power circuit
Address
$07
Bit 3
X
X
-
LCDON
LCDON
Bit 2
0
1
Bit 1
LCD power
Regulator
X
X
Voltage
-
supply
circuit
LCD Power Circuit Diagram
Bit 0
X
X
-
R/W
R/W
26
CUP1
CUP2
VP3 = 1/2 VP2
VSUB
GND
VP1 = 3/2 VP2
VP2 = 1.8 - 2.1V
V
DD
= 2.0 - 3.6V
Bit2: Set LCD display on
LCD off
LCD on
0.1uF
0.1uF
0.1uF
Remarks
DD
0.1uF
is between 2.0V and 3.6V.
0.1uF
SH66K51A