LC75843UGA Datasheet, PDF (18/35 Pages) ON Semiconductor – Duty General-Purpose LCD Driver

LC75843UGA
(3) PS10, PS11 to PS40, PS41    General-purpose output port (P1 to P4) function setting control data
These control data bits set the general-purpose output function (High or low level output), clock output function or
PWM output function of the P1 output pin, and the general-purpose output function (High or low level output) or
PWM output function of the P2 to P4 output pins.
However, be careful of being unable to set a PWM output function when the external clock operating frequency is
set the fCK2=38[kHz] typ (EXF=“1”) in external clock operating mode (OC=“1”).
PS10
PS11
General-purpose output port (P1) function
0
0
General-purpose output function (High or low level output)
1
0
0
1
1
1
Clock output function (clock frequency : fosc/2, fCK/2)
Clock output function (clock frequency : fosc/8, fCK/8)
PWM output function (ch1) (Support for PWM data W10 to W15)
PS20
0
1
0
1
PS21
0
0
1
1
General-purpose output port (P2) function
General-purpose output function (High or low level output)
PWM output function (ch1) (Support for PWM data W10 to W15)
PWM output function (ch2) (Support for PWM data W20 to W25)
PWM output function (ch3) (Support for PWM data W30 to W35)
PS30
0
1
0
1
PS31
0
0
1
1
General-purpose output port (P3) function
General-purpose output function (High or low level output)
PWM output function (ch1) (Support for PWM data W10 to W15)
PWM output function (ch2) (Support for PWM data W20 to W25)
PWM output function (ch3) (Support for PWM data W30 to W35)
PS40
0
1
0
1
PS41
0
0
1
1
General-purpose output port (P4) function
General-purpose output function (High or low level output)
PWM output function (ch1) (Support for PWM data W10 to W15)
PWM output function (ch2) (Support for PWM data W20 to W25)
PWM output function (ch3) (Support for PWM data W30 to W35)
(4) 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
1/4 duty
Correspondence display data
1/3 duty
1/2 duty
1/1 duty
S1/P1
D1
D1
D1
D1
S2/P2
D5
D4
D3
D2
S3/P3
D9
D7
D5
D3
S4/P4
D13
D10
D7
D4
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.
No.A2226-18/35