Philips 26PF5521D/10 : Specifications : Page 41

Circuit Descriptions, Abbreviation List, and IC Data Sheets

EN 41LC4.31E AB 9.

9.4 PNx83xx MOJO

The MOJO is a source decoder chip targeted for very low cost

application in integrated digital televisions.The device contains

all hardware and software to be able to decode and display

MPEG2 transport streams, including:

• Descrambling

• Demultiplexing

• Audio / video decompression

• Video encoding.

• Overlay graphics provisions

Some features of the MOJO are:

• 32-bit PR1910 core operating at 120 MHz.

• 16-bit memory and peripheral interface to connect ROM,

NOR Flash and various peripherals.

• Sixteen external interrupt inputs shared with PIO lines.

• Several embedded peripheral units with physical interfaces

to:

– Two UART (RS-232) data ports

–Two I

2

C master / slave transceivers

– Two smart-card reader interfaces

– One Integrated Conditional Access Module interface

• Supports parallel and serial transport stream input

interfaces

9.5 Front End

The front end of the “IBO Zapper” module is almost identical to

the “IBO+” module as used in the A10E with the exception that

the Transport Streams that come from the COFDM

demodulator are now fed through the PCMCIA controller first.

The PCMCIA controller receives encrypted Transport Streams

from the COFDM demodulator. Via the PCMCIA card, these

encrypted Transport Streams are decrypted, and transported

to the MOJO.

9.6 Back End

The MOJO is the main building block of the back-end of the

“IBO Zapper” module. The IC decodes the MPEG-2 stream into

analogue video and digital audio.

9.6.1 Transport Stream Input

The Transport Stream input is according to MPEG2 standard.

In the “IBO Zapper 2”, only 8-bit parallel is supported. The used

TS names are TDA_DATA.

9.6.2 Video Outputs

The MOJO has two analogue video outputs:

• Primary (TV): YUV + RGB

• Secundary (VCR): CVBS

The primary MOJO output is used as input for the TV display

and is fed either to the Hercules YUV/RGB input (pins 78/79/

80), for teletext insertion purposes, or directly to the analogue

Scaler input D2/C2/B2. The signal path is as follows:

switch 7G09 chooses between the SCART1 input signal and

the YUV/RGB output of the MOJO. The signal selected by

switch 7G09 is passed on to one group of the inputs of switch

7E00. The other group of inputs of this switch is connected to

the three analogue input pins of the DVI-D connector. The

output signal of switch 7E00 is passed on to the Hercules input,

pins 78/79/80 and to the Scaler input D2/C2/B2 via switch 7E01

in the MUX-SYNC interface. This switch chooses between the

MOJO output signal and the Hercules output signal, which is

used for SDTV signals (analogue terrestrial TV reception via

the analogue receiving part). The Hercules output is not only

used for SDTV signals, but also for MOJO output signals that

were first sent to the Hercules input for e.g. teletext reinsertion

purposes before they are passed on to the Scaler.

The secundary MOJO output, which delivers CVBS signals, is

used for monitoring purposes or for recording via the SCART 2

output of the TV set. The signal path of the secundary MOJO

output is as follows:

the CVBS/VCR signal coming from the MOJO is sent to the

Hercules video switch input, pin 58, via switch 7G07. The

signal then appears on one of the outputs of the Hercules video

switch, pin 48, and is passed on via switches 7219 and 7G10

to pin 19 of SCART 2, which is the CVBS/monitor output.

For further details, see the manuals of the original TV sets on

which the various models of IBO zappers are based.

9.6.3 Audio Outputs

The MOJO has two audio output interfaces:

• SPDIF Out: The SPDIF sound output goes directly to a

connector on the back of the module.

• I2S Out: This digital sound output is fed through a DAC and

the analogue L/R signals are directely fed into the

Hercules.

9.7 IBOLink Interface

The IBOLink™ approach is such that the conventional TV

microcontroller is re-used when digital functionality is added. In

principle, the TV can still operate without the bolt-on module.

The IBOLink™ software is added to the TV-set software, and is

operating as a software bridge.

9.8 Control Interface

The “IBO Zapper” is connected as a slave I

bus should be +5V tolerable and operating at 100kHz(MAX).

The “IBO Zapper” module slave address is 0xE4 (similar to

IBO+) but is configurable via IBOLink.

All communication from digital module to Television chassis

has to be initiated via an active low hardware interrupt line from

the digital module.

9.9 UART Interface

The UART interfaces (Universal Asynchronous Receiver And

Transmitter) are serial interfaces, which are used to transfer

data and commands between two devices.

The “IBO Zapper” system uses an UART interface for serial

communication with a PC for:

• Diagnostic SW for Service or Production

• SW uploading for Service or Development

9.10 Power Supply IBO Zapper Module

The “IBO Zapper” module operates from a single 12V supply

provided by the TV chassis. All other voltages that the module

needs are derived from the +12V. The module has four

different physical power states:

Please refer to the LC4.31E AA manual for more information.