Myalarm V-LCD1 Instrukcja Użytkownika Pobierz pdf (Strona 11)

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

S4/P4 output pin, that output pin will output a high level (V

LCD

) when the display data D13 is 1, and a low level

) when the D13 is 0.

No. 7159--11/26

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

1 2 ... 6 7 8 9 10 11 12 13 14 15 16 ... 25 26

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