參數(shù)資料
型號: SAA5297AH
廠商: NXP Semiconductors N.V.
英文描述: Economy teletext and TV microcontrollers
中文描述: 經(jīng)濟(jì)圖文電視和電視微控制器
文件頁數(shù): 32/68頁
文件大?。?/td> 612K
代理商: SAA5297AH
1997 Jul 07
32
Philips Semiconductors
Preliminary specification
Economy teletext and TV microcontrollers
SAA5x9x family
8.7
Inventory page
If the TXT0.INV ON bit is a logic 1, memory block 8 is used
as an inventory page.The inventory page consists of two
tables: the Transmitted Page Table (TPT) and the Subtitle
Page Table (SPT).
In each table, every possible combination of the page tens
and units digit, 00H to FFH, is represented by a byte. Each
bit of these bytes corresponds to a magazine number so
each page number, from 100 to 8FF, is represented by a
bit in the table.
The bit for a particular page in the TPT is set when a page
header is received for that page. The bit in the SPT is set
when a page header for the page is received which has the
‘subtitle’ page header control bit (C6) set.
Before the inventory page is enabled the software must
ensure that page request 8 is put on hold.
Fig.8 Table organisation.
handbook, full pagewidth
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7xx
bit
7
Bytes in the table
Bytes in each byte
column
0
row n
n + 1
n + 6
n + 7
0
MGD160
8
16
24
32
39
6xx
5xx
4xx
3xx
2xx
1xx
8xx
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