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BCM3120 Datasheet

  • BCM3120

  • 2頁

  • ETC

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BCM3120
PRODUCT
BCM3120
B C M 3 1 2 0
Brief
TRANSCEIVER
O F
B E N E F I T S
S E T- T O P
F E AT U R E S
BOX
S U M M A R Y
鈥?/div>
Integrated QAMLink
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
In-Band Receiver
10-bit A/D converter with input AGC amplifier
Variable symbol rate 256-QAM receiver
Digital demodulator, Nyquist filters, tracking loops, and
32-tap adaptive decision feedback equalizer
ITU-T J.83 Annex A/B/C compatible FEC decoder
MPEG packet filter
廬
鈥?/div>
Universal set-top front-end supports the ITU-T J.83
Annex A/B/C standards.
鈥?/div>
Represents a complete solution for dual downstream
channels (in-band and out-of-band) and the
upstream channel.
鈥?/div>
Integrated analog front-end for the dual downstream
and upstream blocks reduces board complexity and
system costs.
set-top box peripherals without additional devices.
鈥?/div>
Integrated QPSK Out-of-Band Receiver
鈥?/div>
100-200 MHz LO with AGC and 6-bit A/D Converter
鈥?/div>
Variable symbol rate QPSK receiver
鈥?/div>
Digital demodulator, Nyquist filters, tracking loops, and
4-tap adaptive decision feedback equalizer
鈥?/div>
DigiCipher II
廬
/DVB/DAVIC FEC decoder
鈥?/div>
Message packet processor and DMA interface
鈥?/div>
Integrated peripheral control unit supports required
鈥?/div>
Interfaces seamlessly to Broadcom鈥檚
BCM7020/BCM7030 set-top box decoder for a two-
chip set-top box solution.
鈥?/div>
Integrated Upstream Transmitter
鈥?/div>
Programmable Starvue II/DOCSIS/EuroDOCSIS/DVB/
DAVIC FEC encoder
鈥?/div>
Pre equalization filter
鈥?/div>
Up to 6MBaud variable rate QPSK/16-QAM modulator
鈥?/div>
10-bit D/A converter with output power control
interfaces
鈥?/div>
Peripheral Control Unit
only applications
鈥?/div>
Keypad, LED, IR, UART, RF and generic control
鈥?/div>
MC-68331 and SH7707 microcontroller interfaces
鈥?/div>
I
2
C/SPI compatible interface is available for modem
Set-top Box Block Diagram
In-Band Channel
BCM3120
Universal
Set-top
Transceiver
BCM7020/BCM7030
Set-top Box Decoder
Tuner
Out-of-Band Channel
Audio
Video
Upstream Channel
CPU
I/O
Memory

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