UPD16666A 查看數據表（PDF） - NEC => Renesas Technology
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UPD16666A Datasheet PDF : 16 Pages
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PPD16666A
PIN FUNCTIONS
Classification
Power
Liquid-crystal
display timing
Pin Name
VCC1
VSS
VDD
VEE
V1
STB
FRMB
DOFFB’
L1
L2
DIR
Liquid-crystal
drive output
X1 to X240
Input/Output
I
I
I
I
I
I
O
Pad No.
Function
5 V power for level shifter
GND power for level shifter
Power for logic; liquid-crystal drive level power
Power for logic; liquid-crystal drive level power (GND)
Liquid-crystal drive level power
Row drive strobe signal
Frame signal
Display OFF signal
Drive level power selection signal (1st line)
Drive level power selection signal (2nd line)
Shift direction selection signal: when L (DIR = VEE), X1 o X240
when H (DIR = VDD), X240 o X1
Liquid-crystal drive output
Selects and outputs one of VDD, VEE, and V1.
DETAILS OF PIN FUNCTIONS
• STB (input)
Refers to the input pin of the row drive strobe signal.
The bidirectional shift register is shifted at STB’s rising edge.
• FRMB (input)
Refers to the input pin of the frame signal.
The shift register data is read at STB’s rising edge.
• DIR (input)
Refers to the input pin of the drive output’s shift direction selection signal.
When the shift direction selection signal (DIR) is “L”, the shift data (selection signal) is shifted from the drive
output X1 to the X240 direction. When “H”, it is shifted from the X240 to the X1 direction.
• DOFFB’ (input)
Refers to the input pin of the display OFF signal.
It is placed in the display OFF status (all outputs at V1) at the “L” level. In the mean time, it reads the frame signal
and returns to the normal display status at the “H” level.
• L1 & L2 (input)
Refer to the input pins of the drive level power selection signal.
In the case of the liquid-crystal drive output, the two lines are selected simultaneously by the shift register. L1
selects the first line, and L2 the second line. Both lines select VDD at “H”, and VEE at “L”.
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