LC75839PW Datasheet, PDF (14/27 Pages) Sanyo Semicon Device – 1/4 and 1/3-Duty General-Purpose LCD Display Driver

LC75839PW
(3) P0 to P2 … Segment output port/general-purpose output port switching control data
These control data bits switch the segment output port/general-purpose output port functions of the S1/P1 to S4/P4
output pins.
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
Note: Sn (n=1 to 4): Segment output ports
1
0
0
P1
P2
P3
P4
Pn (n=1 to 4): General-purpose output ports
Note: When are setting (P0,P1,P2)=(1,0,1), (1,1,0), and (1,1,1), the all P1/S1 to P4/S4 output pins selects the
segment 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
Correspondence display data
1/4 duty
1/3 duty
S1/P1
D1
D1
S2/P2
D5
D4
S3/P3
D9
D7
S4/P4
D13
D10
For example, if the circuit is operated in 1/4 duty and the S4/P4 output pin is selected to be a general-purpose output
port, the S4/P4 output pin will output a high level when the display data D13 is 1, and will output a low level when
D13 is 0.
(4) DT … 1/4-duty 1/3-bias drive or 1/3-duty 1/3-bias drive switching control data
This control data bit selects either 1/4-duty 1/3-bias drive or 1/3-duty 1/3-bias drive.
DT
Drive scheme
The COM4/S51 pin state
0
1/4-duty 1/3-bias drive
1
1/3-duty 1/3-bias drive
COM4
S51
Note: COM4: Common output
S51 : Segment output
(5) DN … S52 pin and S53/OSCI pin state setting control data
This control data bit sets state of the S52 pin and the S53/OSCI pin.
Number of display segments
DN
1/4 duty
1/3 duty
Pin state
S52
S53/OSCI
0
Up to 200 segments
1
Up to 208 segments
Up to 153 segments
Up to 159 segments
“L” (VSS)
S52
“L” (VSS)/OSCI
S53/OSCI
Note: “L” (VSS)
S52
: Low (VSS) level output
: Segment output
“L” (VSS)/OSCI : Low (VSS) level output in internal oscillator operating mode (OC=0)
: External clock input in external clock operating mode (OC=1)
S53/OSCI
: Segment output in internal oscillator operating mode (OC=0)
External clock input in external clock operating mode (OC=1)
No.A1953-14/27