lc75808e Sanyo Semiconductor Corporation, lc75808e Datasheet - Page 7

• Manufacturer Part Number: lc75808e
• Description: 1/8 To 1/10 Duty Lcd Display Drivers With Key Input Function
• Manufacturer: Sanyo Semiconductor Corporation

Pin Functions
COM1 to COM10
KS1 to KS6
S1 to S60
KI1 to KI5
P1 to P4
V
V
V
V
V
TEST
V
OSC
V
INH
V
Pin
DO
LCD
LCD
LCD
LCD
LCD
CE
CL
DI
LCD
DD
SS
0
1
2
3
4
LC75808E
72 to 63
73 to 78
79 to 83
84 to 87
3 to 62
100
97
99
98
96
90
91
92
93
94
88
89
95
1
2
Pin No.
LC75808W
70 to 61
71 to 76
77 to 81
82 to 85
1 to 60
100
95
98
99
97
96
94
88
89
90
91
92
86
87
93
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
Also,external power 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
V
Segment driver outputs.
Common driver outputs.
Key scan outputs.
Although normal key scan timing lines require diodes to be inserted in
the timing lines to prevent shorts, since these outputs are unbalanced
CMOS transistor outputs, these outputs will not be damaged by shorting
when these outputs are used to form a key matrix.
Key scan inputs.
These pins have built-in pull-down resistors.
General-purpose output ports.
Oscillator connection.
An oscillator circuit is formed by connecting an external resistor and
capacitor at this pin.
This pin must be connected to ground.
Power supply connection. Connect to ground.
Serial data interface connections to the controller. Note that DO, being
an open-drain output, requires a pull-up resistor.
CE :Chip enable
CL :Synchronization clock
DI :Transfer data
DO :Output data
LCD drive 2/4 bias voltage (middle level) supply pin. This pin can be
used to supply the 2/4 (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.
Input that turns the display off, disables key scanning, 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 1/4 bias voltage (middle level) supply pin. This pin can be
used to supply the 1/4 (V
Logic block power supply connection. Provide a voltage of between 4.5
and 6.0V.
LCD
However, serial data can be transferred when the INH pin is low.
4 must be in the range 0 V to 1.5 V, inclusive.
• Display off
• General-purpose output ports P1 to P4 = low (V
• Key scanning is disabled: KS1 to KS6 = low (V
• All the key data is reset to low.
• Display on
• The states of the general-purpose output ports can be set by
• Key scanning is enabled.
S1 to S60 = “L” (V
COM1 to COM10 = “L” (V
the PC1 to PC4 control data.
LCD
LCD
0 – V
0 – V
LC75808E, 75808W
LCD
LCD
SS
DD
):
4) must be greater than or equal to 4.5 V.
4) must be greater than or equal to 4.5 V, and
):
LCD
LCD
LCD
0 – V
0 – V
LCD
0 – V
Function
4).
LCD
LCD
LCD
LCD
4) voltage level externally.
4) voltage level externally.
4) voltage level externally.
4).
SS
SS
)
)
Active
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
H
H
L
I/O
I/O
—
—
—
O
O
0
I
I
I
I
I
I
I
I
I
I
No. 6370 -7/39
when unused
Handling
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
OPEN
GND
GND
GND
V
V
—
—
—
—
DD
DD