HT1632C datasheet(5/24 Pages) HOLTEK

5 / 24 page

HT1632C

Rev. 1.20

June 28, 2011

Functional Description

Display Memory

- RAM

The static display memory (RAM) is organized into 64

´4

bits or 96

´4 bits and is used to store the display data. If

32 ROW & 8 COM is selected, the RAM size is 64

´4

bits. If 24 ROW & 16 COM is selected, the RAM size is

´4 bits. The contents of the RAM are directly mapped

to the contents of the LED driver. If the data in RAM is

set to

²1², the corresponding LED will be lighted. Data in

the RAM can be accessed by the READ, WRITE, and

READ-MODIFY-WRITE commands. The contents of

the RAM can be read or written from bit 0 of the specific

address. The following is a mapping from the RAM to

the LED pattern:

COM7

COM6

COM5

COM4

COM3

COM2

COM1

COM0

ROW0

01H

00H

ROW1

03H

02H

ROW2

05H

04H

ROW3

07H

06H

ROW4

09H

08H

ROW5

0BH

0AH

ROW6

0DH

0CH

ROW7

0FH

0EH

ROW8

11H

10H

ROW9

13H

12H

ROW10

15H

14H

ROW11

17H

16H

ROW12

19H

18H

ROW13

1BH

1AH

ROW14

1DH

1CH

ROW15

1FH

1EH

ROW16

21H

20H

ROW17

23H

22H

ROW18

25H

24H

ROW19

27H

26H

ROW20

29H

28H

ROW21

2BH

2AH

ROW22

2DH

2CH

ROW23

2FH

2EH

ROW24

31H

30H

ROW25

33H

32H

ROW26

35H

34H

ROW27

37H

36H

ROW28

39H

38H

ROW29

3BH

3AH

ROW30

3DH

3CH

ROW31

3FH

3EH

Addr.

Data

Addr.

Data

32 ROW & 8 COM for 64

´4 Display RAM

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