Control Data Functions

1. P0 to P3: Segment output port/general-purpose output port switching control data.

These control data bits switch the S1/P1 to S8/P8 output pins between their segment output port and general-purpose

output port functions.

Note: Sn (n = 1 to 8): Segment output ports

Pn (n = 1 to 8): General-purpose output ports

Also note that when the general-purpose output port function is selected, the output pins and the display data will

have the correspondences listed in the tables below.

For example, when 1/4 duty drive scheme is used, if the general-purpose output port function is selected for the

Page 11

LC75813E, 75813T

Control data

Output pin state

P0

P1

P2

P3

S1/P1

S2/P2

S3/P3

S4/P4

S5/P5

S6/P6

S7/P7

S8/P8

0

0

0

0

S1

S2

S3

S4

S5

S6

S7

S8

0

0

0

1

P1

S2

S3

S4

S5

S6

S7

S8

0

0

1

0

P1

P2

S3

S4

S5

S6

S7

S8

0

0

1

1

P1

P2

P3

S4

S5

S6

S7

S8

0

1

0

0

P1

P2

P3

P4

S5

S6

S7

S8

0

1

0

1

P1

P2

P3

P4

P5

S6

S7

S8

0

1

1

0

P1

P2

P3

P4

P5

P6

S7

S8

0

1

1

1

P1

P2

P3

P4

P5

P6

P7

S8

1

0

0

0

P1

P2

P3

P4

P5

P6

P7

P8

Output pin

Corresponding display data

1/3 duty

1/4 duty

S1/P1

D1

D1

S2/P2

D4

D5

S3/P3

D7

D9

S4/P4

D10

D13

S5/P5

D13

D17

S6/P6

D16

D21

S7/P7

D19

D25

S8/P8

D22

D29

2. DR: 1/2 bias drive or 1/3 bias drive switching control data

This control data bit selects either 1/2 bias drive or 1/3 bias drive.

DR

Bias drive scheme

0

1/3 bias drive

1

1/2 bias drive

3. DT: 1/3 duty drive or 1/4 duty drive switching control data

This control data bit selects either 1/3 duty drive or 1/4 duty drive.

Note: COM4: common output

S87: segment output

DT

Duty drive scheme

Output pin state (COM4/S87)

0

1/4 duty drive

COM4

1

1/3 duty drive

S87