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參數(shù)資料

型號：	SAA5532PS/NNNN
廠商：	NXP SEMICONDUCTORS
元件分類：	微控制器/微處理器
英文描述：	8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PDIP52
封裝：	0.600 INCH, PLASTIC, SDIP-52
文件頁數(shù)：	36/100頁
文件大小：	412K
代理商：	SAA5532PS/NNNN

2000 Feb 23

Philips Semiconductors

Preliminary specication

Enhanced TV microcontrollers with

On-Screen Display (OSD)

SAA55xx

17.3.1

TXT DISPLAY MEMORY SFR ACCESS

The Display memory when in TXT mode (see Fig.15) is

configured as 40 columns wide by 25 rows and occupies

× 8-bit of memory. Using TXT15.BLOCK<3:0>, the

required display page can be selected to be written to.

The row and column within that block is selected using

TXT9.R<4:0> and TXT10.C<5:0>. The data at the

selected position can be read or written using

TXT11.D<7:0>.

Whenever a read or write is performed on TXT11, the row

values stored in TXT9 and column value stored in TXT10

are automatically incremented. For rows 0 to 24 the

column value is incremented up to a maximum of 39, at

which point it resets to zero and increments the row

counter value. When row 25 column 23 is reached the

values of the row and column are both reset to zero.

Writing values outside of the valid range for TXT9 or

TXT10 will cause undetermined operation of the

auto-incrementing function for accesses to TXT11.

17.3.2

TXT DISPLAY MEMORY MOVX ACCESS

It is important for the generation of OSD displays, that use

this mode of access, to understand the mapping of the

MOVX address onto the display row and column value.

This mapping of row and column onto address is shown in

Table 12. The values shown are added onto a base

address for the required memory block (see Fig.14) to give

a 16-bit address.

Table 12 Column and row to ‘MOVX’ address (lower 10 bits of address)

ROW

COL.0

.....

COL.23

.....

COL.31

COL.32

.....

COL.39

Row 0

000H

.....

017H

.....

01FH

3F8H

.....

3FFH

Row 1

020H

.....

037H

.....

03FH

3F0H

.....

3F7H

::::

:::

::::

:::

Row 23

2E0H

.....

3F7H

.....

2FFH

340H

.....

347H

Row 24

300H

.....

317H

.....

31FH

338H

.....

33FH

Row 25

320H

.....

337H

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相關(guān)代理商/技術(shù)參數(shù)	參數(shù)描述
SAA5533	制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD
SAA5533PS	制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD
SAA5540PS/NNNN	制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:TV microcontrollers with Closed Captioning (CC) and On-Screen Display (OSD)
SAA5541PS/NNNN	制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:TV microcontrollers with Closed Captioning (CC) and On-Screen Display (OSD)
SAA5542	制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD

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