參數(shù)資料
型號: SAA7146A
廠商: NXP Semiconductors N.V.
英文描述: Multimedia bridge, high performance Scaler and PCI circuit SPCI
中文描述: 多媒體橋梁,高性能潔牙機和PCI電路SPCI
文件頁數(shù): 112/144頁
文件大?。?/td> 645K
代理商: SAA7146A
1998 Apr 09
112
Philips Semiconductors
Product specification
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
SAA7146A
7.16.3
A
UDIO INTERFACE PINS
There are 14 audio interface pins. SD1 is output only for A1 and input only for A2, SD4 is output only for A2 and input
only for A1. The other pins can be used by either one of the two interface circuits but only one at a time.
Table 99
Audio pin list
7.16.4
A
UDIO INTERFACE CIRCUIT
Each of the two audio interface circuits of the SAA7146A consists of the following major functional parts:
Output Dword (format) buffer (to load from FIFO)
Output data selector (byte Mux 8 to 1)
Parallel-to-serial converter
Output pin selector (destination Mux)
Serial data input selector (bit Mux 4 to 1)
Serial-to-parallel converter (1 byte)
Input Dword (format) buffer (to store into FIFO)
Audio input FIFO and master write DMA
Feedback (hand) buffer
Master read DMA and audio output FIFO
Bit clock selector or generator
Time slot counter and word select signal generator.
PIN
I/O
FUNCTION
ACLK
I
audio reference clock; multiple of serial bit clock, multiple of audio sampling; maximum
frequency 25 MHz; has to be provided even in slave mode
bit clock 1
bit clock 2
serial data output for audio interface A1 or input for A2
serial data I/O for audio interface A1 or A2
serial data I/O for audio interface A1 or A2
serial data I/O for audio interface A1 or A2
serial data input for audio interface A1 or output for A2
word select line 0, as input it is used as super frame sync (trigger)
word select output line 1
word select output line 2
word select output line 3
word select line 4, as input it is used as super frame sync (trigger)
BCLK1
BCLK2
SD0
SD1
SD2
SD3
SD4
WS0
WS1
WS2
WS3
WS4
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
I/O
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