LC75817E Datasheet, PDF (7/43 Pages) Sanyo Semicon Device – 1/8 to 1/10 Duty Dot Matrix LCD Display Controller/Driver with Key Input Function

LC75817E, 75817W
Pin Functions
Pin
S1 to S59
S60/COM10
Pin No.
LC75817E LC75817W
3 to 61
62
1 to 59
60
Function
Segment driver outputs.
The S60/COM10 pin can be used as common driver output
under the “set display technique” instruction.
COM1 to COM9 71 to 63
KS1 to KS6 72 to 77
KI1 to KI5
P1 to P4
78 to 82
83 to 86
69 to 61
70 to 75
76 to 80
81 to 84
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
OSCI
OSCO
CE
CL
DI
DO
INH
97
95
Oscillator connections. An oscillator circuit is formed by
96
94
connecting an external resistor and capacitor at these pins.
100
98
Serial data interface connections to the controller. Note that DO,
being an open-drain output, requires a pull-up resistor.
1
99
CE : Chip enable
2
100
CL : Synchronization clock
DI : Transfer data
99
97
DO : Output data
Input that turns the display off, disables key scanning, and
forces the general-purpose output ports low.
• When INH is low (V_SS):
• Display off
98
96
S1 to S59 = “L” (V_LCD4).
S60/COM10 = “L” (V_LCD4).
COM1 to COM9 = “L” (V_LCD4).
• General-purpose output ports P1 to P4 = low (V_SS)
• Key scanning disabled: KS1 to KS6 = low (V_SS)
• All the key data is reset to low.
• When INH is high (V_DD):
• Display on
• The state of the general-purpose output ports can
be set by executing a "Set general-purpose output
port state" instruction.
• Key scanning is enabled.
However, serial data can be transferred when the INH pin is
low.
TEST
95
93
This pin must be connected to ground.
Active
—
—
—
H
—
—
—
H
—
—
L
—
V_LCD0
V_LCD1
V_LCD2
V_LCD3
V_LCD4
V_DD
V_LCD
V_SS
LCD drive 4/4 bias voltage (high level) supply pin. The level on
this pin can be changed by the display contrast adjustment circuit.
89
87
However, (V_LCD0 – V_LCD4) 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.
LCD drive 3/4 bias voltage (middle level) supply pin. This pin can
90
88
be used to supply the 3/4 (V_LCD0 – V_LCD4) voltage level externally.
—
LCD drive 2/4 bias voltage (middle level) supply pin. This pin can
91
89
be used to supply the 2/4 (V_LCD0 - V_LCD4) voltage level externally.
—
LCD drive 1/4 bias voltage (middle level) supply pin. This pin can
92
90
be used to supply the 1/4 (V_LCD0 – V_LCD4) voltage level externally.
—
LCD drive 0/4 bias voltage (low level) supply pin. Fine
adjustment of the display contrast can be implemented by
93
91
connecting an external variable resistor to this pin.
—
However, (V_LCD0 – V_LCD4) must be greater than or equal to 4.5
V, and VLCD4 must be in the range 0 V to 1.5 V, inclusive.
87
85
Logic block power supply connection. Provide a voltage of
between 4.5 and 6.0 V.
—
LCD driver block power supply connection. Provide a voltage of
88
86
between 7.0 and 10.0 V when the display contrast adjustment
circuit is used and provide a voltage of between 4.5 and 10.0 V
—
when the circuit is not used.
94
92
Power supply connection. Connect to ground.
—
I/O Handling when unused
O
OPEN
O
OPEN
O
OPEN
I
GND
O
OPEN
I
GND
O
OPEN
I
I
GND
I
O
OPEN
I
V_DD
I
—
O
OPEN
I
OPEN
I
OPEN
I
OPEN
I
GND
—
—
—
—
—
—
No. 6144-7/43