FV-DB1E
AudioFVService ManualFVMarketE --DDBB11EE
CHAPTER 7. OTHER
[1] Function table of IC
TUN1 RTUNSA001SJZZ: DAB Unit
1. FS2020 (VENICE) MODULE OVERVIEWThe FS1010 (Chorus) processor is based around Imagination Technol-
ogies' META advanced RISC/DSP. In addition to running the core DAB
1.1. Introductiondemodulation functions, this processor is well suited to running the
application code, which receiver manufacturers will add on top of the
The FS2020 (Venice) module has been developed as an OEM module,
core DAB processing to produce complete products. The core DAB
which will enable low cost Band only DAB receivers. All that is
functions require less than one third of the processing capacity of
required to produce a low cost Digital Radio is a power source,
META, leaving considerable scope for application processing.
antenna, LCD and Keypad. Alternatively the module can be pro-
grammed to operate in ?slave? mode under the control of an existing
2. HARDWARE INTERFACES
microcontroller. The module has been designed for use in static, porta-
ble and car audio products.The FS2020 (Venice) module has a number of hardware interfaces,
designed to support a range of DAB applications. The characteristics
Reference software can be provided for both master (Reference MMI),
of these interfaces are detailed below.
or slave (Serial Interface) applications.
2.1. RF Input
1.2. Features
There are two connectors available that can be used to carry VHF (174
A block diagram of the Module is shown in Figure 7-1. The main com-
MHz to 240 MHz) for Band Only. These are a 2.6 mm UMP type and
ponents are Band RF frontend, FS1010 (Chorus) DAB baseband
2.54 mm pitch holes to be used with a header or for direct soldering of
processor, a serial boot FLASH and audio DAC. As an option SDRAM
an RF cable.
can be fitted to support advanced applications. External components
that may be connected to the module are shown as grey blocks in Fig-Input impedance:50 R, nominal
ure 7-1.VSWR2.0, maximum
NOTE: 5 V rail is connected to RF section only and care should beMax power:0 dBm
taken to provide a clean, decoupled supply to ensure that theSensitivity:
RF sensitivity is not degraded.(signal level required for 10-4 BER with 1/2 rate coding) -96 dBm
Adjacent Channel Rejection
(for 10-4BER with 1/2 rate coding)35 dB minimum
Keypad/External
LCDRotaryDAC or
encoderCODEC2.2. Analogue Audio output
Stereo line level outputs are provided using the on-board stereo audio
5VDAC.
2
2.3. Digital Audio Input/Output (IS)
Band IIISDRAM
RF(optional)
FS1010Seven signal wires (master clock, bit clock, sample frame, stereo in, 6
channel out) carry digital audio input and multi-channel output to an
(Chorus)
external DAC or CODEC. The multi-channel output may be used for
384KBhome cinema applications including Dolby Digital and DTS.SerialAudio
FlashRAMDAC
Sample rate:48 kHz
Master clock rate:512 x sample rate (24.576 MHz)
Sample resolution:16, 18, 20 or 24 bits (controlled by software).
2.4. S/PDIF Audio Output
SerialS/PDIFUSB
I/Faces& RDII/faceThe S/PDIF audio output carries a stereo digital audio output on a sin-
I/faces
gle wire using the signal format defined in IEC60958.
Figure 7-1 VENICE MODULE BLOCK DIAGRAMSample rate:48 kHz
(Functions in white are on board, in grey are external)Sample resolution:24 bits
2.5. S/PDIF Input
An on-board SPI port supports a serial boot FLASH device. A dedi-The S/PDIF input accepts digital audio data on a single wire using the
cated port is provided for direct connection to an LCD, general-purposesignal format defined in IEC60958. This input may also be used as an
I/O lines are provided for keypad scanning, shaft encoder input andinput for CD-ROM data including MP3 encoded date.
control of simple circuits.
2.6. RDI Output
Hardware interfaces include USB ports, and a serial host port for con-
nection to a controlling CPU.The RDI output carries a an RDI signal conforming to Specification of
Stereo audio output is available in S/PDIF digital formats, as well asthe Receiver Data Interface (RDI) - Eureka 147 Project - Issue 1. 4
November 1996 on a single wire using the signal format defined in
line level. Multi-channel audio output is available via the I2S port, while
PCM or compressed audio can be input to CHORUS via the S/PDIFIEC60958. If an output is not required, then this line may be used as
GPIO.
input.
Sample rate:48 kHz
RDI format:high capacity
7 - 1 |
ACEC
