Datasheet

DEM 16220 SYH-PY Product Specification
Version: 1.1.1 PAGE:6
4. BLOCK DIAGRAM
VSS
VDD
V0
RS
R/ W
E
DB 0
~
DB 7
ST7066U-0A
COM1~16
L CD PANEL
2Li neX16Char act er s
SEG0~4
0
SEG41~8
0
ST7065C
B/ L
A
K
5. PIN ASSIGNMENT
Pin No. Symbol Function
1 VSS Ground terminal of module.
2 VDD Supply terminal of module 5.0V.
3 V0 Power Supply for liquid crystal drive.
4 RS
Register select
RS = 0…Instruction register
RS = 1…Data register
5 R/W
Read /Write
R/W = 1…Read
R/W = 0…Write
6 E Enable
7 DB0
8 DB1
9 DB2
10 DB3
11 DB4
12 DB5
13 DB6
14 DB7
Bi-directional data bus, data transfer is performed once, thru DB0
to DB7, in the case of interface data. Length is 8-
b
its; and twice,
thru DB4 to DB7 in the case of interface data length is 4-
b
its.
Upper four bits first then lower four bits.
15 LED – (K) Please also refer to 6.1 PCB drawing and description.
16 LED + (A) Please also refer to 6.1 PCB drawing and description.