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參數(shù)資料
| 型號： | 935269343557 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP160 |
| 封裝： | 28 X 28 MM, 3.40 MM HEIGHT, ROHS COMPLIANT, PLASTIC, SOT322-2, MS-022, QFP-160 |
| 文件頁數(shù)： | 17/143頁 |
| 文件大?。?/td> | 696K |
| 代理商： | 935269343557 |
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2004 Aug 25
113
Philips Semiconductors
Product specication
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
SAA7146A
7.16.5.1
Audio mode control
There are 3 audio mode bits to select which TSL is active and how to synchronize and combine them. The first half of
Table 105 supports asynchronous operation of A1 and A2, each following their own configuration bits and working
independent of each other. In the second half of the table, the two interfaces work synchronously, according to the clock
configuration setting of A1_CLKSRC. Some special cases are discussed below.
AUDIO_MODE [2:0] = 7: the two TSLs are chained to each other thus enabling a longer TSL, with up to 32 time slots to
be built (SINGER format). There is only one common TSL pointer active which is able to reach the whole address range.
The pointer synchronisation is done according to the A1 configuration. There is only one EOS bit needed.
AUDIO_MODE [2:0] = 5
6: both interfaces working synchronously on the same TSL half and with the same record.
Synchronous change from one TSL to the other TSL when reaching the protection address. By that the TSL can be
changed, by switching to the other TSL, without disturbing real time flow of audio streams. There is no time gap
necessary for reprogramming a TSL. Reprogramming is performed by using the other TSL as shadow. The two TSL
pointers are locked, i.e. each one pointing to its own list area, but resetting and incrementing synchronously.
Table 105Audio_mode control
AUDIO_MODE
[2:0]
AUDIO INTERFACE A1
AUDIO INTERFACE A2
000
off
001
processing TSL1; synchronisation according to
A1 conguration
off
010
off
processing TSL2; synchronisation according
to A2 conguration
011
processing TSL1; synchronisation according
to A1 conguration
processing TSL2; synchronisation according
to A2 conguration
100
processing TSL1; synchronisation according
to A1 conguration
processing TSL2; TSL2 pointer is in sync
(locked) to TSL1 pointer;
TSL2 pointer = TSL1 pointer + 16
101
processing TSL1; synchronisation according
to A1 conguration
processing TSL1 in common with A1;
TSL2 pointer = TSL1 pointer
110
processing TSL2 in common with A2;
TSL1 pointer = TSL2 pointer
processing TSL2; synchronisation according
to A1 conguration
111
processing TSL1 and TSL2 in common with A2,
synchronization according to A1 conguration;
TSL1 pointer range is up to 32 records
processing TSL1 and TSL2 in common with A1;
TSL2 pointer = TSL1 pointer
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相關(guān)代理商/技術(shù)參數(shù) |
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