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PDF LC75812PT Datasheet ( Hoja de datos )

Número de pieza LC75812PT
Descripción Dot Matrix LCD Display Controllers/Drivers
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LC75812PT datasheet

1 Page

LC75812PT pdf
(1) When CL is stopped at the low level
CE
VIH1
CL 50%
VIL1
DI VIH1
VIL1
DO
tds
tφH
tdh
tφL
LC75812PT
VIH1
tcp tcs
D0
(2) When CL is stopped at the high level
[Figure 2]
tdc
VIL1
tch
D1
tdr
VIH1
CE
tφL tφH VIH1
CL 50%
VIL1
tcp tcs
DI
VIH1
VIL1
tds tdh
DO D0
[Figure 3]
(3) OSC pin clock timing in external clock operating mode
D1
tdc
OSC
VIH2
50%
VIL2
tCKH
tCKL
[Figure 4]
fCK=
1
tCKH + tCKL
[kHz]
DCK=
tCKH
tCKH + tCKL
×100[%]
VIL1
tch
tdr
No.A1417-5/54

5 Page

LC75812PT arduino
LC75812PT
ADRAM (Additional data RAM)
ADRAM is RAM that is used to store the ADATA display data. ADRAM has a capacity of 13×5 bits, and the stored
display data is displayed directly without the use of CGROM or CGRAM. The table below lists the correspondence
between the 4-bit ADRAM address loaded into AC and the display position on the LCD panel.
When the ADRAM address loaded into AC is 0H. (Number of digit displayed: 13)
Display digit
1 2 3 4 5 6 7 8 9 10 11 12 13
ADRAM address (hexadecimal) 0 1 2 3 4 5 6 7 8 9 A B C
However, when the display shift is performed by specifying ADATA, the ADRAM address shifts as shown below.
Display digit
1 2 3 4 5 6 7 8 9 10 11 12 13
(shift left)
ADRAM address (hexadecimal) 1 2 3 4 5 6 7 8 9 A B C 0
Display digit
1 2 3 4 5 6 7 8 9 10 11 12 13
(shift right)
ADRAM address (hexadecimal) C 0 1 2 3 4 5 6 7 8 9 A B
Note: *5. The ADRAM address is expressed in hexadecimal.
Least significant bit
LSB
Most significant bit
MSB
ADRAM address
RA0 RA1 RA2 RA3
Hexadecimal
Example: When the ADRAM address is AH.
RA0
RA1
RA2
RA3
0101
Note: *6. 5×7 dots • • • • • 13th digit display 5 dots
5×8 dots • • • • • 13th digit display 4 dots
CGROM (Character generator ROM)
CGROM is ROM that is used to generate the 240 kinds of 5×7 or 5×8 dot matrix character patterns from the
8-bit character codes. CGROM has a capacity of 240×40 bits. When a character code is written to DCRAM, the
character pattern stored in CGROM corresponding to the character code is displayed at the position on the LCD
corresponding to the DCRAM address loaded into AC.
CGRAM (Character generator RAM)
CGRAM is RAM to which user programs can freely write arbitrary character patterns. Up to 16 kinds of 5×7 or 5×8
dot matrix character patterns can be stored. CGRAM has a capacity of 16×40 bits.
No.A1417-10/54

10 Page





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