PNX1311EH NXP Semiconductors, PNX1311EH Datasheet - Page 111

• Manufacturer Part Number: PNX1311EH
• Manufacturer: NXP Semiconductors

Specifications of PNX1311EH

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Enhanced Video Out
7.1
In this document, the generic PNX1300 name refers
to the PNX1300 Series, or the PNX1300/01/02/11
products.
The PNX1300 Enhanced Video Out (EVO) improves on
the design of the TM-1000 Video Out (VO) unit while
maintaining binary-compatibility. PNX1300 EVO is fully
backward compatible with TM-1100, and has been ex-
tended to support byte data rates up to 81-MHz and im-
prove the Genlock mode. The summary of new EVO fea-
tures versus TM-1000 includes:
• Internal clock generator (DDS) has reduced jitter
• Full alpha blending supports 129-levels
• Chroma keying
• Frame synchronization can be internally or externally
• External frame sync. follows the field number gener-
• Programmable YUV output clipping
• Data-valid signal generated in data-streaming mode
• In message passing mode, message length can
7.2
This chapter describes the PNX1300 EVO unit which ex-
tends and improves the design of the TM-1000 VO unit,
and consolidates the changes introduced in the TM-
1100. Please refer to the TM-1000 databook for a de-
scription of the VO unit’s functionality.
7.3
The EVO is functionally compatible with the TM-1000 VO
unit. All TM-1000 VO features are supported exactly in
the same fashion by the PNX1300 EVO. Software written
for the TM-1000 VO can control the PNX1300 EVO with-
out modification (with the exception of the Genlock mode
which now requires EVO_CTL. GENLOCK to be set to 1
in addition to VO_CTL. SYNC_MASTER = 0).
All new features (with respect to TM-1000) and improve-
ments are selectively enabled by setting bits in the
EVO_CTL MMIO register, described in
method to determine the existence of EVO registers is
given in
generated (Genlock mode)
ated in the EAV/SAV code
range from one word (4 bytes) up to 16 MB.
ENHANCED VIDEO OUT SUMMARY
ABOUT THIS DOCUMENT
BACKWARD COMPATIBILITY
Section
7.16.1.
Section
7.16.4. A
by Marc Duranton, Dave Wyland, Gert Slavenburg
The PNX1300 EVO features are disabled on hardware
reset in order to remain hardware-compatible with the
TM-1000 VO. So it is assumed throughout this chapter
that all new functions controlled by EVO_CTL are en-
abled by software. Any new software should use the new
EVO modes.
7.4
The PNX1300 EVO generates and transmits continuous
digital video images. It can connect to an off-chip video
subsystem such as a digital video encoder chip (e.g., the
Philips SAA7125 DENC digital encoder), a digital video
recorder, or the video input of another PNX1300 through
a CCIR 656-compatible byte-parallel video interface.
See
The EVO can either supply video pixel clock and syn-
chronization signals to the external interface or synchro-
nize to signals received from the external interface (Gen-
lock mode).
PAL, NTSC, 16:9 and other video formats including dou-
ble pixel-rate, non-interlaced video formats are support-
ed through programmable registers which control pixel
clock frequency and video field or frame format.
The EVO can combine a background video image from
SDRAM with an optional foreground graphics overlay im-
age from SDRAM using 129-level, per-pixel alpha blend-
ing. The composite result is sent out as continuous vid-
eo. Video image data is taken from a planar memory
format, with separate Y, U and V planes in memory in
YUV 4:2:2 or 4:2:0 format. The optional graphics overlay
is taken from a pixel-packed YUV 4:2:2+α data structure
in memory.
The EVO can also be used to stream continuous data
(data-streaming mode) or send unidirectional messages
(message-passing mode) from one PNX1300 to another.
In data-streaming mode, the EVO generates a continu-
ous stream of arbitrary byte data using internal or exter-
nal clocking. Dual buffers allow continuous data stream-
ing in this mode by allowing the DSPCPU to set up a
buffer while another is being emptied by the EVO. Data-
valid signals are generated on VO_IO1 and VO_IO2 to
synchronize data streaming to other PNX1300 data re-
ceivers.
In message-passing mode, unidirectional messages can
be sent to the Video In (VI) port(s) of one or more
PNX1300s. Start and end-of-message signals are pro-
PRELIMINARY SPECIFICATION
Figure
FUNCTION SUMMARY
7-1,
Figure
7-2, and
Figure
Chapter 7
7-3.
7-1