PNX1502E/G,557 NXP Semiconductors, PNX1502E/G,557 Datasheet - Page 513
PNX1502E/G,557
Manufacturer Part Number
PNX1502E/G,557
Description
IC MEDIA PROC 300MHZ 456-BGA
Manufacturer
NXP Semiconductors
Specifications of PNX1502E/G,557
Applications
Multimedia
Core Processor
TriMedia
Controller Series
Nexperia
Interface
I²C, 2-Wire Serial
Number Of I /o
61
Voltage - Supply
1.23 V ~ 1.37 V
Operating Temperature
0°C ~ 85°C
Mounting Type
Surface Mount
Package / Case
456-BGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Program Memory Type
-
Ram Size
-
Lead Free Status / Rohs Status
Compliant
Other names
568-1298
935277748557
PNX1502E/G
935277748557
PNX1502E/G
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PNX15XX_PNX952X_SER_N_4
Product data sheet
2.4.1 Interrupt Latency
2.4 Interrupts
2.5 Timestamp Events
2.6 Serial Data Framing
Audio Out has a level triggered interrupt request signal. An interrupt is asserted as
long as any of the UNDERRUN, HBE, BUF1_EMPTY or BUF2_EMPTY condition
flags are asserted. and the corresponding INTEN bit is enabled. Interrupts are sticky
(i.e., an interrupt remains asserted until the software explicitly clears the condition
flag by an ACK action).
Remark: For legacy reasons, the MMIO interrupt mechanism for Audio Out has not
been changed.
During normal error free transmission, the source of an Audio Out interrupt will be
from BUF1_EMPTY and BUF2_EMPTY. The DMA buffer size configured in the
AO_SIZE register will directly affect the frequency of these ‘empty’ interrupts.
Software should set up the AO_SIZE register with a large enough value so that
interrupts occur no more frequently than 1 ms in order to meet system interrupt
latency requirements.
Audio Out exports event signals associated with audio transmission to the central
timestamp/timer function in the system. The central timestamp/timer function can be
used to count the number of occurrences of each event or timestamp, the occurrence
of the event, or both. The event will be a positive edge pulse with the duration of the
event to be greater than or equal to 200 nS. The specific event exported is:
This event represents a precise, periodic time interval which can be used by system
software for audio/video synchronization.
The Audio Out unit can generate data in a wide variety of serial data framing
conventions.
frame starts with a positive edge of the WS signal. If POLARITY = 0, a serial frame
starts with a negative edge on WS. (See
•
BUF_DONE — The occurrence of this TSTAMP event indicates that the last word
of the current DMA memory buffer has started to be sent out on the serial data
port.
Figure 3
Rev. 4.0 — 03 December 2007
illustrates the notion of a serial frame. If POLARITY = 1, a
Section 4. on page
PNX15xx/952x Series
Chapter 15: Audio Output
15-522.) If
© NXP B.V. 2007. All rights reserved.
15-513
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