LC75884E Datasheet, PDF (10/27 Pages) Sanyo Semicon Device – 1/4 Duty LCD Display Drivers with Key Input Function

LC75884E, LC75884W
Control Data Functions
1. 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
outputs during key scan standby.
Control data
S0
S1
0
0
0
1
1
0
1
1
Mode
Normal
Sleep
Sleep
Sleep
OSC oscillator
Operating
Stopped
Stopped
Stopped
Segment outputs
Common outputs
Operating
L
L
L
Note: This assumes that the KS1/S54 and KS2/S55 output pins are selected for key scan output.
Output pin states during key scan standby
KS1 KS2 KS3 KS4 KS5 KS6
H
H
H
H
H
H
L
L
L
L
L
H
L
L
L
L
H
H
H
H
H
H
H
H
2. K0, K1 : Key scan output /segment output selection data
These control data bits switch the functions of the KS1/S54 and KS2/S55 output pins between key scan output and
segment output.
Control data
K0
K1
0
0
0
1
1
X
Output pin state
KS1/S54
KS2/S55
KS1
KS2
S54
KS2
S54
S55
X: don’t care
Note: KSn(n=1 or 2) : Key scan output
Sn (n=54 or 55): Segment output
Maximum number of
input keys
30
25
20
3. P0 to P2 : Segment output port/general-purpose output port selection data
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.
Control data
Output pin state
P0
P1
P2
S1/P1 S2/P2 S3/P3 S4/P4
0
0
0
S1
S2
S3
S4
0
0
1
P1
S2
S3
S4
0
1
0
P1
P2
S3
S4
0
1
1
P1
P2
P3
S4
1
0
0
P1
P2
P3
P4
Note: Sn(n=1 to 4): Segment output port
Pn(n=1 to 4): 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.
Output pin
S1/P1
S2/P2
Corresponding display data
D1
D5
S3/P3
D9
S4/P4
D13
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 (Vss) when D13 is 0.
No. 6086-10/27