lc75864w Sanyo Semiconductor Corporation, lc75864w Datasheet - Page 9

• Manufacturer Part Number: lc75864w
• Description: 1/4 Duty Lcd Display Drivers With Key Input Function
• Manufacturer: Sanyo Semiconductor Corporation

Control Data Functions
1. S0, S1: Sleep control data
2. K0, K1: Key scan output/segment output selection data
3. P0 to P2: Segment output port/general-purpose output port selection data
4. SC: Segment on/off control data
These control data bits switch between normal mode and sleep mode and set the states of the KS1 to KS6 key scan
outputs during key scan standby.
Note: This assumes that the KS1/S23 and KS2/S24 output pins are selected for key scan output.
These control data bits switch the functions of the KS1/S23 and KS2/S24 output pins between key scan output and
segment output.
These control data bits switch the functions of the S1/P1 to S4/P4 output pins between the segment output port and
the general-purpose output port.
The table below lists the correspondence between the display data and the output pins when these pins are selected to
be general-purpose output ports.
For example, if the S4/P4 output pin is selected to be a general-purpose output port, the S4/P4 output pin will output
a high level (V LCD ) when the display data D13 is 1, and will output a low level(V SS ) when D13 is 0.
This control data bit controls the on/off state of the segments.
However, note that when the segments are turned off by setting SC to 1, the segments are turned off by outputting
segment off waveforms from the segment output pins.
: don’t care
S0
K0
P0
Output pin
0
0
1
1
0
0
1
0
0
0
0
1
Control data
Control data
S1/P1
S2/P2
S3/P3
S4/P4
SC
0
1
Control data
S1
K1
P1
0
1
0
1
0
1
0
0
1
1
0
Corresponding display data
Display state
P2
KS1/S23
0
1
0
1
0
Normal
Mode
Sleep
Sleep
Sleep
D13
KS1
S23
S23
D1
D5
D9
On
Off
Output pin state
S1/P1
S1
P1
P1
P1
P1
OSC oscillator
Operating
KS2/S24
Stopped
Stopped
Stopped
LC75864E, 75864W
KS2
KS2
S24
S2/P2
S2
S2
P2
P2
P2
Output pin state
Maximum number of input keys
S3/P3
S3
S3
S3
P3
P3
Common outputs
Segment outputs
Operating
30
25
20
L
L
L
S4/P4
S4
S4
S4
S4
P4
Output pin states during key scan standby
KS1
Notes: KSn (n = 1 , 2): Key scan output
Notes: Sn (n = 1 to 4):
H
H
L
L
KS2
Sn (n = 23, 24): Segment output
Segment output port
Pn (n = 1 to 4):
General-purpose output port
H
L
L
H
KS3
H
H
L
L
KS4
H
H
L
L
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KS5
H
H
H
L
KS6
H
H
H
H