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Motorola Electronic Components Datasheet

MC92308 Datasheet

OFDM Demodulator

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MC92308 pdf
MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
Current Information@www.mot.com/ADC
Product Preview
OFDM Demodulator
The MC92308 is a Orthogonal Frequency Division Multiplex Demodulator for 2K
transmission mode according to the ETSI specification for digital terrestrial broadcast-
ing (PR ETS 300744). The MC92308 contains all the functionality required to demod-
ulate the information transmitted in one UHF channel.
Feature Summary
• Usable for 8MHz/7MHz/6MHz channels by adjusting the clock rate
• Digital I/Q separation on-chip
• Supports QPSK, 16-QAM and 64-QAM
• Supports all guard interval lengths (1/32, 1/16, 1/8, 1/4)
• Accepts 8-bit TTL-compatible twos-complement data input
• Provides the required control signals for Automatic Gain Control and ADC clock
frequency control
• Performs channel estimation and correction by using the embedded pilot carriers
• I2C serial bus compatible interface (M-Bus) and parallel interface for external pro-
gramming and control of the device
• Transmission Parameter Signalling is decoded and made available to the system
controller via M-Bus or parallel microprocessor interface
• Companion to DVB compliant 2K-FFT Processor (MC92307)
• Output interface for DBV compliant FEC
• Fast synchronization at power-on and after channel switch
• Low implementation margin
• 0.5µ CMOS Process at 3.3V
MC92308
RESB
CLKCTLP
CLK CLKCTLN
AGCCTLP
AGCCTLN
ADCDATA[7:0]
FFTSTART
CLKEN18
FFTDO[7:0]
SYMSYNC
FFTDI[11:0]
MBUS[1:0]
FECCLK
DVALID
G1DATA[2:0]
G2DATA[2:0]
Ordering Information
Device
Package
MC92308CI 160MQUAD
Figure 1. OFDM Frontend Processing
This document contains information on a product under development.
Motorola reserves the right to change or discontinue this product without notice.
© MOTOROLA, INC. 1997
5/7/97


Motorola Electronic Components Datasheet

MC92308 Datasheet

OFDM Demodulator

No Preview Available !

MC92308 pdf
ADCDATA0
ADCDATA1
ADCDATA2
ADCDATA3
VDD
VSS
ADCDATA4
ADCDATA5
ADCDATA6
ADCDATA7
VDD
VSS
VDD
VSS
CLKEN18
CLK
VDD
VSS
VDD
CLKCTLP
CLKCTLN
VDD
VSS
AGCCTLP
AGCCTLN
VDD
VSS
VSS
VSS
VDD
VDD
VDD
VSS
VSS
VDD
VSS
MADDR0
MADDR1
MADDR2
MADDR3
160MQUAD
reserved (VSS)
reserved (VSS)
reserved (VSS)
VSS
VDD
reserved (VSS)
reserved (VSS)
reserved (VSS)
reserved (VSS)
reserved (VSS)
reserved (VSS)
VSS
VDD
reserved (VSS)
reserved (VSS)
RESB
VSS
VDD
reserved (open)
reserved (open)
reserved (open)
reserved (open)
reserved (open)
reserved (open)
VSS
VDD
reserved (open)
reserved (open)
reserved (open)
VSS
VDD
reserved (open)
reserved (open)
VSS
VDD
reserved (open)
reserved (open)
reserved (open)
VSS
VDD
SIGNAL
CLK
RESB
CLKEN18
ADCDATA[7:0]
CLKCTLP
CLKCTLN
AGCCTLP
AGCCTLN
FFTSTART
FFTDO[7:0]
MOTOROLA
2
Table 1. MC92308 Pin Description
FUNCTIONALITY
Common clock input (36.57 MHz)
Reset (synchronous)
ADC data strobe
Input for samples from ADC
ADC clock synchronization loop (+)
ADC clock synchronization loop (-)
Analog AGC loop (+)
Analog AGC loop (-)
FFT start signal
Complex data output to FFT (muxed)
TYPE
TTL - IN
TTL - IN
TTL - IN
TTL - IN
TTL - OUT
TTL - OUT
TTL - OUT
TTL - OUT
TTL - OUT
TTL - OUT
POLTY
high
low
high
high
high
low
high
low
high
high
MC92308
Rev.1.4


Part Number MC92308
Description OFDM Demodulator
Maker Motorola
Total Page 4 Pages
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