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LC75808E Folha de dados(PDF) 7 Page - Sanyo Semicon Device

Nome de Peças LC75808E
Descrição Electrónicos  1/8 to 1/10 Duty LCD Display Drivers with Key Input Function
Download  39 Pages
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Fabricante Electrônico  SANYO [Sanyo Semicon Device]
Página de início  https://www.sanyo-av.com/us/
Logo SANYO - Sanyo Semicon Device

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No. 6370 -7/39
LC75808E, 75808W
Pin
Pin No.
Function
Active
I/O
Handling
LC75808E
LC75808W
when unused
S1 to S60
3 to 62
1 to 60
Segment driver outputs.
q
q
OPEN
COM1 to COM10
72 to 63
70 to 61
Common driver outputs.
q
q
OPEN
KS1 to KS6
73 to 78
71 to 76
O
OPEN
KI1 to KI5
79 to 83
77 to 81
Key scan inputs.
H
I
GND
These pins have built-in pull-down resistors.
P1 to P4
84 to 87
82 to 85
General-purpose output ports.
q
q
OPEN
OSC
97
95
I/O
VDD
CE
100
98
HI
CL
1
99
I
GND
DI
2
100
—I
DO
99
97
O
OPEN
INH
98
96
LI
VDD
TEST
96
94
This pin must be connected to ground.
I
VLCD090
88
0
OPEN
VLCD191
89
I
OPEN
VLCD292
90
I
OPEN
VLCD393
91
I
OPEN
VLCD494
92
I
GND
VDD
88
86
——
VLCD
89
87
——
VSS
95
93
Power supply connection. Connect to ground.
Pin Functions
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.
Oscillator connection.
An oscillator circuit is formed by connecting an external resistor and
capacitor at this pin.
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
v
Input that turns the display off, disables key scanning, and forces the
general-purpose output ports low.
• When INH is low (VSS):
• Display off
S1 to S60 = “L” (VLCD4).
COM1 to COM10 = “L” (VLCD4).
• General-purpose output ports P1 to P4 = low (VSS)
• Key scanning is disabled: KS1 to KS6 = low (VSS)
• All the key data is reset to low.
• When INH is high (VDD):
• Display on
• The states of the general-purpose output ports can be set by
the PC1 to PC4 control data.
• Key scanning is enabled.
However, serial data can be transferred when the INH pin is low.
LCD drive 3/4 bias voltage (middle level) supply pin. This pin can be
used to supply the 3/4 (VLCD0 – VLCD4) voltage level externally.
LCD drive 2/4 bias voltage (middle level) supply pin. This pin can be
used to supply the 2/4 (VLCD0 – VLCD4) voltage level externally.
LCD drive 1/4 bias voltage (middle level) supply pin. This pin can be
used to supply the 1/4 (VLCD0 – VLCD4) voltage level externally.
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, (VLCD0 – VLCD4) must be greater than or equal to 4.5 V, and
VLCD4 must be in the range 0 V to 1.5 V, inclusive.
Logic block power supply connection. Provide a voltage of between 4.5
and 6.0V.
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.
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, (VLCD0 – VLCD4) must be greater than or equal to 4.5 V.
Also,external power must not be applied to this pin since the pin circuit
includes the display contrast adjustment circuit.


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