saa7146a NXP Semiconductors, saa7146a Datasheet - Page 106

• Manufacturer Part Number: saa7146a
• Description: Multimedia Bridge, High Performance Scaler And Pci Circuit Spci
• Manufacturer: NXP Semiconductors

Philips Semiconductors
7.16.3
There are 14 audio interface pins. SD0 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
Each of the two audio interface circuits of the SAA7146A consists of the following major functional parts:
2004 Aug 25
ACLK
BCLK1
BCLK2
SD0
SD1
SD2
SD3
SD4
WS0
WS1
WS2
WS3
WS4
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.
Multimedia bridge, high performance
Scaler and PCI circuit (SPCI)
PIN
A
A
UDIO INTERFACE PINS
UDIO INTERFACE CIRCUIT
I
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
O
O
O
I/O
I/O
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)
106
FUNCTION
Product specification
SAA7146A