lc75848t Sanyo Semiconductor Corporation, lc75848t Datasheet - Page 14

• Manufacturer Part Number: lc75848t
• Description: 1/8 To 1/10 Duty General-purpose Lcd Display Drivers
• Manufacturer: Sanyo Semiconductor Corporation

Control Data Functions
1. PC1 to PC4: General-purpose output port state setting data
For example, if PC1 and PC2 are set to 1, and PC3 and PC4 are set to 0, then the output pins P1 and P2 will output high
levels (V
2. CT0 to CT3, CTC: Display contrast setting data
CTC: Display contrast adjustment circuit state setting
Note that although the display contrast can be adjusted by operating the built-in display contrast adjustment circuit, it is
also possible to apply fine adjustments to the contrast by connecting an external variable resistor to the V
modifying the V
≥ V
General-purpose output port state setting data
CTC
CT0
0
1
0
1
0
1
0
1
0
1
0
0
1
These control data bits set the states of the general-purpose output ports P1 to P4.
These control data bits set the display contrast.
CT0 to CT3: Display contrast setting (11 steps)
LCD
4 ≥ 0 V.
The display contrast adjustment circuit is disabled, and the V
The display contrast adjustment circuit operates and the display contrast is adjusted.
DD
CT1
0
0
1
1
0
0
1
1
0
0
1
) and the output pins P3 and P4 will output low levels (V
Output pin
CT2
LCD
0
0
0
0
1
1
1
1
0
0
0
4 pin voltage. However, the following conditions must be met: (V
CT3
0
0
0
0
0
0
0
0
1
1
1
LCD drive 4/4 bias voltage supply V
0.94 V
0.91 V
0.88 V
0.85 V
0.82 V
0.79 V
0.76 V
0.73 V
0.70 V
0.67 V
0.64 V
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
= V
PC1
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
P1
– (0.03 V
– (0.03 V
– (0.03 V
– (0.03 V
– (0.03 V
– (0.03 V
– (0.03 V
– (0.03 V
– (0.03 V
– (0.03 V
– (0.03 V
Display contrast adjustment circuit state
PC2
P2
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
LCD
PC3
LC75848T
P3
2)
3)
4)
5)
6)
7)
8)
9)
10)
11)
12)
LCD
LCD
0 pin level is forced to the V
0 level
PC4
P4
SS
).
LCD
level.
LCD
0 – V
LCD
4) ≥ 4.5 V, and 1.5 V
LCD
No. 7160-14/33
4 pin and