LC7942KD Datasheet, PDF (4/8 Pages) Sanyo Semicon Device – CMOS IC Dot-Matrix LCD Drivers

Pin Function
Pin No.
32
34
27
30
Pin name
VDD
VSS
VEE
V1
29
V2
28
V5
38
CP
40
DIO1
25
DIO64
33
RS/LS
36
31
41 to 80
1 to 24
M
DISPOFF
O1 to O40
O41 to O64
26
NC
35
37
39
LC7942KD
Input/Output
Supply
VDD-VSS is the logic supply.
VDD-VEE is the LCD supply.
Functions
Supply
I
I/O
I/O
I
I
I
Output
-
LCD panel drive voltage supplies.
V1 and VEE are selected levels.
V2 and V5 are non-selected levels.
Display data input clock (falling-edge trigger).
RS/LS
L (right shift)
H (left shift)
Data Transfer Direction
O1→O64
O64→O1
DIO1
IN
OUT
DIO64
OUT
IN
LCD panel drive voltage alternating control signal.
O1 to O64 output control input pins.
LCD drive outputs
The output drive level is determined by the display data, M signal and DISPOFF input as
shown below.
M
Data
DISPOFF
Output
L
L
H
V2
L
H
H
VEE
H
L
H
V5
H
H
H
V1
*
*
L
V1
* Don’t care (To be set to either “H” or “L”)
No connection
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