STV9937 datasheet(12/49 Pages) STMICROELECTRONICS

No de pièce	STV9937

Description	120-MHz On-Screen Display for Monitors including PictureBooSTTM and 4 True Independent Window Displays

PDF	49 Pages

Scroll/Zoom	100%

Fabricant	STMICROELECTRONICS [STMicroelectronics]

Site Internet	http://www.st.com

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12 / 49 page

STV9937

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To change from Format B to Format C

S - FWR[0]- FAC[0]- D[0]

® FAC[1]- D[1] ® FAC[2]- D[2] ® D[3] ® D[4]...

The “F” bit from the FAC byte is as follows: F[0] = F[1] = “0” and F[2] = “1”

It is not possible to change from Format C back to Format A or B.

2.3

Read Mode

The transmission format is shown as below:

Start - S(w) - FWR- FAC - Stop - Start - S(r) - D

® D ® D ® D...Stop

Where:

S(w) = Slave address in write mode = BAh = 10111010,

S(r) = Slave address in read mode = BBh = 10111011.

Registers and data in RAM are readable.

This mode is useful when developing OSD applications.

2.4

Addressing Map

Figure 5: Format Changing Sequences

Table 4: Window Addressing Map

Window

Row

Column

Data

Window 0

Row 0

Columns 0 to 31

Control Data (8 bits)

Window 0

Row 1

Columns 0 to 31

PictureBooSTTM Data

Window 0

Row 2

Columns 0 to 31

Color-boxes (8 bits)

Windows 1, 2, 3 and 4

Rows 0 to n (n = 15 max.)

Columns 0 to m (m = 31 max.)

Characters Coding (12 bits)

start

Format A

Start

Format C

Format B

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