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LC75839PWS-H

P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27
LC75839PW
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13
Control Data Functions
(1) PS10 and PS11, PS2 to PS4 … 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 f
CK
2 = 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 Clock output function (Clock frequency : fosc/2, f
CK
/2)
0 1 Clock output function (Clock frequency : fosc/8, f
CK
/8)
1 1 PWM output function (Support for PWM data W10 to W15)
PS2 General-purpose output port (P2) function
0 General-purpose output function (High or low level output)
1 PWM output function (Support for PWM data W20 to W25)
PS3 General-purpose output port (P3) function
0 General-purpose output function (High or low level output)
1 PWM output function (Support for PWM data W30 to W35)
PS4 General-purpose output port (P4) function
0 General-purpose output function (High or low level output)
1 PWM output function (Support for PWM data W10 to W15)
(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 control data is effective only when external clock operating
mode (OC = "1") is set.
EXF External clock operating frequency f
CK
[kHz]
0 f
CK
1=300[kHz]typ
1 f
CK
2=38[kHz]typ
LC75839PW
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14
(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
Note: Sn (n=1 to 4): Segment output ports
Pn (n=1 to 4): General-purpose output ports
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: 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
Note: COM4: Common output
S51 : Segment output
0 1/4-duty 1/3-bias drive COM4
1 1/3-duty 1/3-bias drive S51
(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.
DN
Number of display segments Pin state
1/4 duty 1/3 duty S52 S53/OSCI
0 Up to 200 segments Up to 153 segments “L” (V
SS
) “L” (V
SS
)/OSCI
1 Up to 208 segments Up to 159 segments S52 S53/OSCI
Note: “L” (V
SS
) : Low (V
SS
) level output
S52 : Segment output
“L” (V
SS
)/OSCI : Low (V
SS
) 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)
LC75839PW
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15
(6) FC0 to FC2 … Common/segment output waveform fram frequency control data
These control data bits set the frame frequency of the common and segment output waveforms.
Control data Frame frequency fo[Hz]
FC0 FC1 FC2
Internal oscillator operating mode
(The control data OC is 0,
fosc=300[kHz]typ)
External clock operating mode
(The control data OC is 1
and EXF is 0, f
CK
1=300[kHz]typ)
External clock operating mode
(The control data OC is 1
and EXF is 1, f
CK
2=38[kHz]typ)
0 0 0 fosc/6144 f
CK
1/6144 f
CK
2/768
0 0 1 fosc/4608 f
CK
1/4608 f
CK
2/576
0 1 0 fosc/3072 f
CK
1/3072 f
CK
2/384
0 1 1 fosc/2304 f
CK
1/2304 f
CK
2/288
1 0 0 fosc/1536 f
CK
1/1536 f
CK
2/192
1 0 1 fosc/1152 f
CK
1/1152 f
CK
2/144
1 1 0 fosc/768 f
CK
1/768 f
CK
2/96
Note: When is setting (FC0,FC1,FC2)=(1,1,1), the frame frequency is same as frame frequency at the time of the
(FC0,FC1,FC2)=(0,1,0) setting (fosc/3072, f
CK
1/3072, f
CK
2/384).
(7) OC … Internal oscillator operating mode/external clock operating mode switching control data
This control data bit selects either the internal oscillator operating mode or external clock operating mode.
OC Fundamental clock operating mode
I/O pin (S53/OSCI) state
0 Internal oscillator operating mode S53
1 External clock operating mode OSCI
Note: S53: Segment output
OSCI: External clock input
(8) SC … Segment on/off control data
This control data bit controls the on/off state of the segments.
SC Display state
0 On
1 Off
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.
(9) BU … Normal mode/power-saving mode control data
This control data bit selects either normal mode or power-saving mode.
BU Mode
0 Normal mode
1
Power saving mode
In this mode, the internal oscillator circuit stops oscillation (the S53/OSCI pin is configured for segment
output) if the IC is in the internal oscillator operating mode (OC=0) and the IC stops receiving external
clock signals (the S53/OSCI pin is configured for external clock input) if the IC is in the external clock
operating mode (OC=1). The common and segment output pins go to the V
SS
level. However, the S1/P1
to S4/P4 output pins can be used as general-purpose output ports under the control of the data bits P0 to
P2. (The general-purpose output port P1 to P4 can not be used as clock output or PWM output.)
P1-P3P4-P6P7-P9P10-P12P13-P15P16-P18P19-P21P22-P24P25-P27

LC75839PWS-H

Mfr. #:
Buy LC75839PWS-H
Manufacturer:
ON Semiconductor
Description:
LCD Drivers LCD DISPLAY DRIVER
Lifecycle:
New from this manufacturer.
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