PNX1702EH/G,557 NXP Semiconductors, PNX1702EH/G,557 Datasheet - Page 523
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PNX1702EH/G,557
Manufacturer Part Number
PNX1702EH/G,557
Description
IC MEDIA PROC 500MHZ 456-BGA
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1702EHG557.pdf
(832 pages)
Specifications of PNX1702EH/G,557
Applications
Multimedia
Core Processor
TriMedia
Controller Series
Nexperia
Ram Size
208K x 8
Interface
I²C, 2-Wire Serial
Number Of I /o
61
Voltage - Supply
1.33 V ~ 1.47 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
456-HBGA
Operating Temperature (min)
0C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Program Memory Type
-
Lead Free Status / Rohs Status
Compliant
Other names
935281647557
PNX1702EH/G
PNX1702EH/G
PNX1702EH/G
PNX1702EH/G
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Philips Semiconductors
Volume 1 of 1
3. Operation
PNX17XX_SER_1
Preliminary data sheet
3.1.1 Sample Clock Generator
3.1 Clock Programming
If an HBE error occurs, the last valid sample or sample pair is repeated until the Audio
Out hardware receives enough data to generate a new serial data frame from the
DMA interface adapter.
The sample clock generator is programmable to support various sample frequencies.
Figure 6
wave Direct Digital Synthesizer (DDS) drives the clock system. This DDS is external
to the Audio Out block.
Using the DDS as a clock source allows software to control the coarse and fine clock
rate so that complex forms of synchronization can be implemented without external
hardware. Examples include locking the audio to a broadcast clock, or locking it to an
SPDIF input without changing the system's hardware.
The DDS output is always sent to the OSCLK output pin. This output is intended to be
used as the 256 Fs or 384 Fs system clock source for oversampling D/A converters.
Software may change the oversampling clock frequency dynamically (via the DDS
controls) to adjust the outgoing audio sample rate. In ATSC transport stream
decoding, this is the method used by which the system software locks the audio
output sample rate to the original program provider sample rate.
OSCLK
Figure 6:
SD[0]
SD[1]
SD[2]
SD[3]
SCK
(e.g. 64 x Fs)
WS
(e.g. 256 x Fs)
illustrates the different clock capabilities of the Audio Out unit. A square
Audio Out Clock System and I/O Interface
Rev. 1 — 17 March 2006
Parallel to Serial
Converter
div N+1
div N+1
SER_MASTER
8
7
16 or 32
16 or 32
32
WSDIV
SCKDIV
Audio Out domain
RIGHT sample
LEFT sample
AO_CC[31:0]
0
0
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
PNX17xx Series
Chapter 15: Audio Output
27 MHz x 64
Square Wave
DDS from
Clocks Module
DDS
15-12
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