lc75838e Sanyo Semiconductor Corporation, lc75838e Datasheet - Page 7

• Manufacturer Part Number: lc75838e
• Description: 1/8 To 1/10 Duty General-purpose Lcd Display Drivers
• Manufacturer: Sanyo Semiconductor Corporation

Pin Functions
S39/COM10
COM1 to COM8
S40/COM9
S1 to S38
P1 to P3
V
V
V
V
V
V
OSC
V
V
INH
Pin
LCD
LCD
LCD
LCD
LCD
CE
CL
DI
LCD
DD
SS
0
1
2
3
4
48 to 41
49 to 51
Pin No.
1 to 38
39
40
60
62
63
64
61
54
55
56
57
58
52
53
59
LCD drive 4/4 bias voltage (high level) supply pin. The level on this pin can be changed
by the display contrast adjustment circuit.
However, (V
must not be applied to this pin since the pin circuit includes the display contrast
adjustment circuit.
LCD drive 0/4 bias voltage (low level) supply pin. Fine adjustment of the display
contrast can be implemented by connecting an external variable resistor to this pin.
However, (V
in the range 0 V to 1.5 V, inclusive.
Segment driver outputs.
The S39/COM10 and S40/COM9 pins can be used as common
driver outputs under the control data DT1, DT2.
Common driver outputs.
General-purpose output ports.
Oscillator connection.
An oscillator circuit is formed by connecting an external resistor and capacitor at this
pin.
Power supply connection. Connect to ground.
Serial data transfer inputs.
These pins are connected to the microcontroller.
CE :Chip enable
CL :Synchronization clock
DI :Transfer data
Input that turns the display off and forces the general-purpose output ports low.
• When INH is low (V
• When INH is high (V
LCD drive 3/4 bias voltage (middle level) supply pin. This pin can be used to supply
the 3/4 (V
LCD drive 2/4 bias voltage (middle level) supply pin. This pin can be used to supply
the 2/4 (V
LCD drive 1/4 bias voltage (middle level) supply pin. This pin can be used to supply
the 1/4 (V
LCD driver block power supply connection. Provide a voltage of between 7.0 and 11.0 V
when the display contrast adjustment circuit is used and provide a voltage of between
4.5 and 11.0 V when the circuit is not used.
Logic block power supply connection. Provide a voltage of between 2.7 and 6.0V.
However, serial data can be transferred when the INH pin is low.
• Display off
• General-purpose output ports P1 to P3 = low (V
• Display on
• The states of the general-purpose output ports can be set by the PC1 to
LCD
LCD
LCD
S1 to S38 = “L” (V
S39/COM10, S40/COM9 = “L” (V
COM1 to COM8 = “L” (V
PC3 control data.
LCD
LCD
0 – V
0 – V
0 – V
0 – V
0 – V
LCD
LCD
LCD
LCD
LCD
SS
DD
4) voltage level externally.
4) voltage level externally.
4) voltage level externally.
)
4) must be greater than or equal to 4.5 V. Also,external power
4) must be greater than or equal to 4.5 V, and V
)
LCD
4).
LC75838E, 75838W
LCD
Function
4).
LCD
4)
SS
)
LCD
4 must be
Active
—
—
—
—
—
—
—
—
—
—
—
—
—
H
L
I/O
I/O
—
—
—
O
I
I
I
I
I
I
I
I
when unused
No. 6902-7/39
Handling
Open
Open
Open
Open
Open
Open
Open
GND
GND
GND
V
—
—
—
DD