ST18AU1_DS View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'ST18AU1_DS' PDF : 87 Pages View PDF
ST18-AU1
10 IEC-958 TRANSMITTER
The IEC-958 transmitter accepts either the AC-3/MPEG bitstream or the decoded audio output
PCM data, and formats the input in accordance with the IEC-958 (S/PDIF) specification for
output via the SPDIFOUT pin.
For further information refer to the IEC-958 interface specification.
10.1 IEC-958 transmitter registers
CHANSTA1: Channel status register 1
Bit
0
1
2
3-5
6-7
8-14
15
Bit of C Function
0
0
Consumer mode, fixed
1
Digital data
0
audio data, muted or pcm
1
compressed audio data
2
Copyright indication
0
digital copy prohibited
1
digital copy permitted
3-5
000 (Reserved)
6-7
Mode 0
00 (Fixed)
8-14
Category code
1001100 for DVD (AC3/MPEG)
Genera-
0
tion status 1
original/commercially pre-recorded
no indication/1st generation or higher
Note: write only register.
CHANSTA2: Channel status register 2
Bit
0-7
8-11
12-13
14-15
Bit of C
16-23
24-27
28-29
30-191
Function
00000000 (Fixed)
0100
0000
1100
Fs 48kHz
Fs 44.1kHz
Fs 32kHz
00 clock precision fixed
all 0, fixed
Note: write only register.
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