VP306 datasheet(2/85 Pages) MITEL

2 / 85 page

VP305/6

DRAFT - PRELIMINARY DATA

The duplication or disclosure of data contained on this sheet is subject to the restrictions

on the title page of this document.

CONTENTS.

FUNCTIONAL DESCRIPTION. ..............................................................................................7

1.1. System overview. ..........................................................................................................7

1.2. The QPSK Demodulator block. .....................................................................................9

1.2.1. Input requirements. .............................................................................................10

1.2.3. Matched filters.....................................................................................................10

1.2.4. Decimation filters.................................................................................................10

1.2.5. Carrier frequency synchronisation ......................................................................11

1.2.6. Symbol synchronisation and tracking..................................................................12

1.3. The Viterbi Decoder block. ............................................................................................13

1.3.1. Viterbi error count measurement.........................................................................14

1.3.2. Viterbi error count coarse indication....................................................................15

1.4. The De-interleaver block. ..............................................................................................16

1.5. The Reed Solomon block. .............................................................................................18

1.6. The Energy Dispersal (descrambler) block. ..................................................................18

1.6.1. Output stage........................................................................................................19

1.7. Microprocessor interface. ..............................................................................................19

REGISTER DETAILS .............................................................................................................20

2.1. Parallel interface register map. .....................................................................................20

2.2. Serial interface register map. ........................................................................................23

2.3. BANK: Register bank address - Parallel mode only......................................................25

2.4. RADD: I²C Register address - Serial mode only. ..........................................................26

2.5. BANK 0: Monitor QPSK read registers..........................................................................27

2.5.1. ID: Identification register. ....................................................................................27

2.5.2. INT_QPSK: Interrupt for QPSK block, register....................................................27

2.5.3. INT_FEC: Interrupt FEC register.........................................................................28

2.5.4. STATUS: Status register. ....................................................................................29

2.5.5. AGC_LVL: AGC loop voltage meter register.......................................................30

2.5.6. CR_VCOF U & L: Measured VCO frequency registers. ......................................30

2.5.7. IE_QPSK: Interrupt enable QPSK register..........................................................31

2.6. BANK 1: Program QPSK registers. ...............................................................................32

2.6.1. SYM_CONFIG: Symbol configuration register. ...................................................32

2.6.2. SYM_RP: Symbol AFC reference period register. ..............................................33

2.6.3. SYM_NF U & L: Symbol input nominal frequency registers. ...............................33

VP306 Datasheet(PDF) 2 Page - Mitel Networks Corporation