LC75886PW Datasheet, PDF (12/36 Pages) ON Semiconductor – 1/4 and 1/3-Duty LCD Display Driver

LC75886PW
Control Data Functions
1. OC … RC oscillator operating mode/external clock operating mode switching control data
This control data bit selects the OSC pin function (RC oscillator operating mode or external clock operating mode)
OC
OSC pin function
0
RC oscillator operating mode
1
External clock operating mode
Note: If RC oscillator operating mode is selected, connect an external resistor ROSC and an external capacitor COSC
to the OSC pin.
2. PC50, PC51 … General-purpose output port/clock output port/segment output port switching control data
These control data bits swithes the functions of the P5/S57 output pin between the general-purpose output port, the
clock output port, and the segment output port.
Control data
PC50
PC51
The state of P5/S57 output pin
0
0
General-purpose output port (P5) (”L” level output)
1
0
General-purpose output port (P5) (“H” level output)
0
1
1
1
Clock output port (P5) (Clock frequency is fOSC/2 or fCK/2)
Segment output port (S57)
Note: If the sleep mode is set, the P5/S57 output pin can not be used as the clock output port.
3. KSC … Key scan operation enabled/disabled state setting control data
This control data bit enables or disables key scan operation.
KSC
Key scan operating state
Key scan operation enabled
0
(A key scan operation is performed if any key on the lines corresponding to KS1 to KS6 pin which is set
high is pressed.)
Key scan operation disabled
(No key scan operation is performed, even if any of the keys in the key matrix are pressed.
1
If this state is set up, the key data is forcibly reset to 0 and the key data read request is also cleared.
(DO is set high.))
4. S0, S1 … Sleep control data
These control data bits switch between normal mode and sleep mode, and set the states of the KS1 to KS6 key scan
output during key scan standby.
Control data
S0
S1
Mode
OSC pin state
(RC oscillator
or acceptance
of the external
clock signal)
Segment
output /
Common
output
Output pin states during key scan standby
KS1
KS2
KS3
KS4
KS5
KS6
0
0
Normal
Operating
Operating
H
H
H
H
H
H
0
1
Sleep
Stopped
L
L
L
L
L
L
H
1
0
Sleep
Stopped
L
L
L
L
L
H
H
1
1
Sleep
Stopped
L
H
H
H
H
H
H
Note: This assumes that the KS1/S55 and KS2/S56 output pins are selected for key scan output.
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