saa7240 NXP Semiconductors, saa7240 Datasheet - Page 5

• Manufacturer Part Number: saa7240
• Description: Mpeg-2 Transport Risc Processor
• Manufacturer: NXP Semiconductors

Philips Semiconductors
2
The SAA7240 is a transport MPEG-2 source decoder
designed for application in set-top boxes in a Digital Video
Broadcast (DVB) environment. It is targeted to BSkyB 3.00
and Canal
device is part of a comprehensive source decoding kit that
contains all the hardware and software required to receive
and decode MPEG-2 transport streams, including
descrambling and demultiplexing.
In addition, it includes a PR3930 core, which is a 32-bit
MIPS RISC-based CPU core supporting the MIPS16
instruction set (to reduce memory requirements) and
several peripheral interfaces such as UARTs, I
units, an IEC 1883, and an IEEE 1284 (Centronics)
interface. The SAA7240 is therefore capable of performing
all controller tasks in digital television applications.
Furthermore, the SAA7240 complies with DVB, ICAM and
MULTI2 descrambler standards.
The SAA7240 receives transport streams through a
versatile stream input interface capable of handling both
byte-parallel and bit-serial streams, in various formats,
supporting data streams up to and including 13.5 Mbytes/s
in parallel mode and 81 Mbits/s in serial mode. The data
stream is first applied to an on-chip descrambler with a
DVB descrambling algorithm, on the basis of 14 control
word pairs stored in an on-chip RAM.
Demultiplexing is subsequently applied to the data stream,
to separate up to 40 individual data streams. The
demultiplexer section includes clock recovery and
timebase management. Program Specific Information
(PSI), Service Information (SI), Conditional Access (CA)
messages and private data are selected and stored in
external memory, for subsequent off-line processing by
the internal PR3930 CPU core.
To support advanced board testing facilities, the SAA7240
includes Boundary Scan Test (BST) hardware, according
to the JTAG standard. The device features flexible
3
2001 Oct 22
TYPE NUMBER
MPEG-2 Transport RISC processor
GENERAL DESCRIPTION
ORDERING INFORMATION
SAA7240
+
basic box and web box applications. The
SQFP208
NAME
plastic shrink quad flat package, 208 leads (lead length 1.3 mm);
body 28
2
C-bus
28
34 mm; high stand-off height
5
low-power Sleep modes, which independently control the
activity of each functional block and can sustain set-top
box standby functionality, thus eliminating the need for a
separate front-panel controller.
The SAA7240 requires a supply voltage of 3.3 V for the
I/O pads and a supply voltage of 2.5 V for the core.
2.1
Although the most advanced techniques and sophisticated
tools are used during the design and validation phases,
some design limitations giving some restrictions for
specific applications might be discovered during the
characterization of the SAA7240 and during its life time.
If such an eventuality occurs, a limitation note will be
issued, describing the deviation against the specification
and the advised work-around if any. This limitation note,
also sometimes called ‘anomaly sheet’ or ‘bug list’, is given
to customers when they are in the initial design-in phase.
Once the design-in is in production phase, customers are
informed about any new limitation if the severity is
estimated to be high.
Please contact your nearest Philips Semiconductor sales
office for more information.
2.2
Companies planning to use ICAM implementation in any
final product must obtain a license from News Data
System Corporation before designing such products.
Additional per-chip royalties may be required and are to be
paid by the purchaser to News Data System Corporation.
For information on the Integrated Conditional Access
Module features, a non-disclosure agreement must be
signed with Philips Semiconductors to get the ICAM
specification.
Please contact your nearest Philips Semiconductor sales
office for more information.
DESCRIPTION
PACKAGE
Limitation notes
Integrated Conditional Access Module (ICAM
licensing requirements
Product specification
SAA7240
VERSION
SOT316-1
®
)