PNX1701EH,557 NXP Semiconductors, PNX1701EH,557 Datasheet - Page 553
PNX1701EH,557
Manufacturer Part Number
PNX1701EH,557
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1701EH557.pdf
(832 pages)
Specifications of PNX1701EH,557
Operating Temperature (min)
0C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / Rohs Status
Not Compliant
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Philips Semiconductors
Volume 1 of 1
PNX17XX_SER_1
Preliminary data sheet
Figure 1:
M
Serial Format of a IEC-60958 Block
channel 1
frame 191
3.3.1 IEC-60958 Serial Format
3.3 Data Formatting
W
Figure 1
special “B” preamble, and consists of 192 frames. The sample rate of all embedded
audio data is equal to the frame rate. Each frame consists of 2 subframes. Subframe
1 always starts with an “M” preamble, except for subframe 1 in frame 0, which starts
with a “B”. Subframe 2 always starts with a “W” preamble.
channel 2
When IEC-60958 data carries two-channel PCM data, one audio sample is
transmitted in each sub-frame, “left” in sub-frame 1 and “right” in sub-frame 2. Each
sample can be 16-24 bit, where the MSB is always aligned with bit slot 27 of the sub-
frame. In case of more than 20 bits per sample, the Aux field is used for the 4 LSB
bits.
When IEC-60958 data carries non-PCM audio, such as 1 or more streams of
encoded AC-3 data and/or MPEG audio, each sub-frame carries 16 bits data. The
data of successive frames adds up to a payload data-stream which carries its own
burst-data.
This is described in the “Interface for non-PCM Encoded Audio Bitstreams Applying
IEC958.” Philips Consumer Electronics, June 6 1997, IEC 100c/WG11 (preliminary
for IEC-61937).
shows the serial format layout of an IEC-60958 block. A block starts with a
pre-amble
pre-amble
B, W or M
B, W or M
0
0
B
sub-frame 1
channel 1
4
4
Aux.
Rev. 1 — 17 March 2006
frame 0
unused (0)
Start of block (indicated by unique B pre-amble)
W
sub-frame 2
L
S
B
8
8
channel 2
sub-frame (2 channel PCM)
sub-frame (non-PCM audio)
S
B
L
12
12
M
16
16
channel 1
Sample data
16 bits data
Channel status
Channel status
frame 1
20
20
Validity flag
Validity flag
User data
User data
W
Parity bit
Parity bit
channel 2
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
24
24
Chapter 17: SPDIF Output
PNX17xx Series
M
M
S
B
S
B
M
28
V U C P
28
V U C P
channel 1
31
31
17-4
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