tm1300 NXP Semiconductors, tm1300 Datasheet - Page 91
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tm1300
Manufacturer Part Number
tm1300
Description
Tm-1300 Media Processor
Manufacturer
NXP Semiconductors
Datasheet
1.TM1300.pdf
(533 pages)
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Video In
6.1
The Video In (VI) unit provides the following functions:
• Digital video input from a digital camera or analog
• High-bandwidth (81 MB/sec) raw input data channel.
• Direct 8-10 bit interface for video A/D converters at
• Receiver port for TM1300-to-TM1300 unidirectional
The VI unit operates in one of the modes per
Table 6-1. VI unit mode selection.
Digital video input is in YUV 4:2:2 with 8-bit resolution
multiplexed in CCIR656 format
CCIR656-capable video decoder (such as the Philips
SAA7111 or SAA7113), across an 8-bit-wide interface.
Resolutions up to CCIR601 are accepted at 50 or 60
fields per second. A programmable rectangular image is
captured from a video frame and written in planar format
to TM1300 SDRAM. The video camera or decoder can
be programmed using the TM1300 I
capture mode, luminance (Y) and chrominance (U, V)
pass unmodified. In halfres capture mode, luminance
and chrominance are horizontally decimated by a factor
of two to convert to CIF-like resolution with YUV 4:2:2 or
Mode
0000
0001
0010
0011
0100
0101
0110
1111
1.
camera (using a video decoder).
up to 81-MHz sample rate.
message passing
..
Refer to CCIR recommendation 656: interfaces for dig-
ital component video signals in 525-line and 625-line
television systems. Recommendation 656 is included in
the Philips Desktop Video Data Handbook.
fullres capture
halfres capture
raw8 capture
raw10s capture
raw10u capture
message passing message reception from EVO
Reserved
VIDEO IN OVERVIEW
Function
YUV 4:2:2 capture, no decimation
YUV 4:2:2 capture, decimate by 2
raw 8-bit data capture, pack 4
bytes to a word
raw 10-bit data capture, sign
extend to 16 bits, pack 2 to a word
raw 10-bit data capture, zero-
extend to 16 bits, pack 2 to a word
1
from a digital camera or
Explanation
2
C bus. In fullres
Table
6-1.
MPEG sampling rules. If vertical subsampling on chromi-
nance is desired, it can be performed by software on the
DSPCPU or by the on-chip image coprocessor (ICP).
When operating as raw input data channel, VI accepts 8-
bit-wide data. The operation mode is raw8 capture. No
data selection or data interpretation is done. Data is writ-
ten in packed form, four bytes to a word, to local SDRAM.
There is no hardware control over the rate at which the
source sends data. Instead, VI maintains two pointer/
counter registers to ensure that no data is lost when the
local SDRAM memory buffer fills. Data is accepted at the
clock of the sender. If desired, VI_CLK can be pro-
grammed as an output to drive the data transfer at a pro-
grammable rate.
VI can accept raw data from up to 10-bit A/D converters,
at sampling rates up to 81 MHz. VI can operate in raw8,
raw10u, or raw10s capture mode for eight-bit, unsigned
10-bit or signed 10-bit data. In the 10-bit modes, data is
zero- or sign-extended to 16 bits and stored in packed
form in local SDRAM. As with the raw8-capture mode, VI
maintains two pointer/counter registers to ensure that no
data is lost when the local SDRAM memory buffer fills.
Data is accepted at the externally set sampling rate. If
desired, VI_CLK can be programmed as an output to
serve as a programmable sampling clock.
VI can act as receiver from the Enhanced Video Out
(EVO) unit of another TM1300. One EVO unit can broad-
cast to multiple receiving VIs. In this message passing
mode, no data selection or data interpretation is done.
Each message of the sender is written as byte-packed
data to a separate local SDRAM memory buffer. Mes-
sage start and end is indicated by the sender. The re-
ceiving VI will accept data until the sender indicates mes-
sage end or until the current memory buffer is full. If the
memory buffer fills before message end is encountered,
the received data is truncated and an error condition is
raised.
6.1.1
Besides the VI-specific pins in
I
era or video decoder.
Figure 6-1
tions for commonly used external sources. Note that
VI_DVALID is only used in special circumstances, e.g.
when sending data through a channel that results in
clock periods both with and without data transfers.
PRODUCT SPECIFICATION
2
C interface is typically used to control the external cam-
Interface
through
Figure 6-4
illustrate typical connec-
by Gert Slavenburg
Table
Chapter 6
6-2, the TM1300
6-1
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