PNX1700EH NXP Semiconductors, PNX1700EH Datasheet - Page 557
PNX1700EH
Manufacturer Part Number
PNX1700EH
Description
Manufacturer
NXP Semiconductors
Datasheet
1.PNX1700EH.pdf
(832 pages)
Specifications of PNX1700EH
Operating Temperature (min)
0C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / Rohs Status
Not Compliant
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4. Signal Description
Table 4: SPDIF Out External Signals
5. Register Descriptions
PNX17XX_SER_1
Preliminary data sheet
Signal
SPDO
Type
O
Description
SPDIF output. Self clocking interface carrying either two-channel PCM data with samples up to 24 bits,
or encoded Dolby Digital (AC-3) or MPEG audio data for decoding by an external AC3 or MPEG
capable audio amplifier.
3.5 Endian Mode
4.1 External Interface
5.1 Register Summary
The occurrence of this event represents a precise, periodic time interval which can be
used by system software for audio/video synchronization.
The SPDIF descriptor is a 32-bit word memory data structure,
An external circuit as shown in
output and convert the 3.3 Volt output pin to a drive level of 0.5 V peak-peak into a 75
Ohm load, as required for consumer applications of IEC-60958.
The base address for the PNX17xx Series SPDIF Output Port module is 0x10 9000.
Table 5: SPDIF Output Module Register Summary
Offset
0x10 9000
0x10 9004
0x10 9008
0x10 900C
Figure 3:
•
BUF_DONE - signals when the last word of a memory buffer is being requested
by the SPDO module. Note that this event is not dependent upon memory bus
latency.
Suggested External SPDIF Output Interface Circuitry
PNX17xx
Rev. 1 — 17 March 2006
Name
SPDO_STATUS
SPDO_CTL
Reserved
SPDO_BASE1
SPDO
Figure 3
10 uF
110 ohm
240 ohm
is required to provide an electrically isolated
Description
SPDIF Out Status
SPDIF Out general control register
Base address of buffer1
transformer
1.5 - 7 MHz
1:1
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
Chapter 17: SPDIF Output
PNX17xx Series
phono
RCA
17-8
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