UDC LOCATION

CHARACTER ORGANIZATION

SLICER ORGANIZATION

xxxx 11 10 9 8765432

0

1

MSB

LSB

00

00

63

Code 240/F0h

127

Code 241/F1h

191

Code 242/F2h

Code 243/F3h

Code 244/F4h

Code 245/F5h

Code 246/F6h

Code 247/F7h

Code 248/F8h

Code 249/F9h

Code 250/FAh

Code 251/FBh

Code 252/FCh

Code 253/FDh

Code 254/FEh

960

1023

Code 255/FFh

64

128

255

192

256

319

320

383

384

447

448

511

512

575

576

639

640

703

704

767

768

831

832

896

895

959

40

80

3C0

3F

7F

BF

C0

FF

100

140

180

1C0

200

240

280

2C0

300

340

380

01

00

03

02

05

04

07

06

09

08

0B

11

0A

10

0D

13

0C

12

0F

15

0E

14

11

17

10

16

19

18

21

20

23

22

25

24

27

26

29

28

31

30

21

33

20

32

35

34

37

36

39

38

41

40

43

42

45

44

47

46

31

49

30

48

51

50

53

52

55

54

57

56

59

58

61

60

3F

63

3E

62

Slice 0

Slice 1

Slice 2

Slice 3

Slice 4

Slice 5

Slice 6

Slice 7

Slice 8

Slice 9

Slice 10

Slice 11

Slice 12

Slice 13

Slice 14

Slice 15

Slice 16

Slice 17

Unused

Unused

Unused

Unused

Unused

Unused

Unused

Unused

Unused

Unused

Unused

Unused

Unused

Unused

Code Number Ram Location

hex

dec

Slice Offset

hex

dec

hex

dec

Figure 6 : User Definable Character Codes

FUNCTIONAL DESCRIPTION (continued)

III.3 - User Definable Character Codes (UDC)

Codes 240 to 254 (F0h to FEh) refer to character shape loaded in RAM.

The STV9427/28/29 allows the user to dynamically define character(s) for his own needs (for a special

LOGO for example). Like the ROM characters, a UDC is made of a 12 pixels x 18 slices dot matrix.

In a UDC, each pixel is defined with a bit, 1 refers to foreground, and 0 to background color. Each slice of

a UDC uses 2 bytes :

add + 1

-

-

-

-

PX11

PX10

PX9

PX8

add (even)

PX7

PX6

PX5

PX4

PX3

PX2

PX1

PX0

PX11 is the left most pixel. Character slice address : SLICE ADDRESS = 64 (CHARACTER NUMBER - 240)

+ (SLICE NUMBER + 7) x 2.

Where :

- CHARACTER NUMBER is the number given by the character code.

- SLICE NUMBER is the number given by the slice interpolator (n° of the current slice of the strip : 1 <<18).

STV9427 - STV9428 - STV9429

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