pnx1500 NXP Semiconductors, pnx1500 Datasheet - Page 559

• Manufacturer Part Number: pnx1500
• Description: Pnx15xx Series Connected Media Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
Volume 1 of 1
PNX15XX_SER_3
Product data sheet
Figure 2:
M
Serial Format of an IEC60958 Block
channel 1
2.3.1 Received Serial Format
2.3.2 Memory Formats
frame 191
2.3 General Operations
W
Section 3.2
The S/PDIF input block will copy the incoming samples into memory in the order that
they occur in the input bitstream. The input bitstream is parsed and audio samples
are captured and packed as 32-bit words prior to being written to memory. The SPDIF
Input decoder always decodes the bi-phase encoded samples into binary prior to
transfer to memory. Refer to
sample sizes supported by the SPDIF Input module.
channel 2
•
•
•
Raw capture mode: Subframe bits [31:0] inclusive are selected and stored. All
“biphase” encoded bits are decoded and a binary representation of the IEC60958
subframe is generated. The entire 32-bit binary number is then stored as one unit
in memory.
16-bit mode: The input samples are packed into 32-bit words consisting of two
16-bit samples per 32-bit word. This mode is compatible with the TM1100 and
PNX2700 Audio Out memory formats.
32-bit mode: For 17 through 24-bit audio, the samples are formatted into 32-bit
words and placed in memory at consecutive 32-bit addresses. For these sample
sizes, the sample is first combined with a programmable bitmask
B, W or M
pre-amble
B, W or M
pre-amble
0
0
B
sub-frame
provides detailed information regarding use of all functional modes.
channel 1
4
4
Aux.
Rev. 3 — 17 March 2006
frame 0
unused (0)
Start of block (indicated by unique B pre-amble)
W
L
S
B
8
8
sub-frame
channel 2
sub-frame (non-PCM audio)
sub-frame (2 channel PCM)
Figure 4
S
B
12
12
L
M
for the memory formatting for each of the
channel 1
16
16
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
24
24
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
PNX15xx Series
M
M
S
B
S
B
Chapter 18: SPDIF Input
M
28
V U C P
28
V U C P
channel 1
31
31
18-3