STLED524 datasheet(34/72 Pages) STMICROELECTRONICS

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Detailed description

STLED524

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DocID026217 Rev 1

4.7.2

Locking columns and rows

The content of any column or row can be locked during scroll. The content of locked

rows/columns does not move during scroll. Locked rows/columns always display the

content of pattern 1.

Any combination of columns can be locked by corresponding bits in the column lock

registers. Besides, any combination of rows can be locked by corresponding bits in the row

lock register. Columns and rows can be locked at the same time.

Table 41. Scroll step register

Scroll steps

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Add = 43h

SCRSTP[4:0]

Default

000

Table 42. Column lock register 1

Column

lock 1

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Add = 33h

COLCK7

COLCK6

COLCK5

COLCK4

COLCK3

COLCK2

COLCK1

COLCK0

Default

Table 43. Column lock register 2

Column

lock 2

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Add = 34h

COLCK15

COLCK14

COLCK13

COLCK12

COLCK11

COLCK10

COLCK9

COLCK8

Default

Table 44. Column lock register 3

Column

lock 3

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Add = 35h

COLCK23

COLCK22

COLCK21

COLCK20

COLCK19

COLCK18

COLCK17

COLCK16

Default

000

Table 45. Row lock register

Column

lock 3

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Add = 35h

ROWLCK4

ROWLCK3

ROWLCK2

ROWLCK1

ROWLCK0

Default

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