LC75829PE Datasheet, PDF (13/22 Pages) Sanyo Semicon Device – 1/4 and 1/3-Duty General-Purpose LCD Display Driver

LC75829PE, 75829PW
Control Data Functions
(1) PS10 and PS11 … General-purpose output port (P1) function setting control data
These control data bits set the clock output or general-purpose output function (High or low level output) of the P1
output pin.
PS10
PS11
General-purpose output port (P1) function
0
0
General-purpose output function (High or low level output)
1
0
Clock output function (Clock frequency : fosc/2, fCK/2)
0
1
Clock output function (Clock frequency : fosc/8, fCK/8)
Note: When is setting (PS10, PS11)=(1,1), the P1 output pin selects the general-purpose output function
(High or low level output).
(2) EXF … External clock operating frequency setting control data
This control data sets the operating frequency of the external clock which input into the OSCI pin, when the external
clock operating mode (OC=”1”) is set. However, this data is effective only when external clock operating mode
(OC= "1") is set.
EXF
External clock operating frequency fCK[kHz]
0
fCK1=300[kHz]typ
1
fCK2=38[kHz]typ
(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 (VDD) when the display data D13 is 1, and will output a low level
(VSS) 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
No.A1462-13/22