AT78C1507 ATMEL Corporation, AT78C1507 Datasheet

no-image

AT78C1507

Manufacturer Part Number
AT78C1507
Description
DVD/CD Read Channel
Manufacturer
ATMEL Corporation
Datasheet
Features
Description
The AT78C1503 is a programmable DVD/CD channel responsible for servo algebra, gain con-
trol, equalization, bit detection and clock extraction for CD-ROM, DVD-ROM, DVD-R, DVD-RW
and DVD-RAM formats. Programmable features allow data rates up to 5X DVD. Also, for DVD-
RAM functionality, the channel serves the write path providing laser power control and pit asym-
metry detection. Up to 2X DVD write speeds are supported for DVD-R, DVD-RW and DVD-
RAM. The extracted wobble frequency is supplied to the AT78C1507 companion chip which in
turn synthesizes the write clock.
The AT78C1507 is the companion chip to the AT78C1503 – DVD/CD Read Channel – and the
AT78C1504 – DVD/CD Automatic Laser Power Controller. Working in conjunction with the read
channel, the AT78C1507 is responsible for wobble clock synthesis for DVD-R and DVD-RAM
formats. In addition, the two parts working together also support pre-pit data and clock recovery
for the DVD-R format. Four separate inputs are provided to enable the AT78C1507 to perform
tracking servo algebra, using just the outrigger photo detector signals (E, F, G, H for example)
coming from the OPU. This extends the range of supported tracking servo algebra functions for
the 1503-1507 combination. Lastly, OPC capability is supported for efficient writing of DVD-R,
DVD-RAM and CD-R disks.
Based on CMOS technology, both the AT78C1503 and AT78C1507 operate from a single 3.3V
supply and are fully programmable through serial interfaces for both CD and DVD modes.
Operating Supply Range 3.0V to 3.6V
Power Dissipation 1W Max
Low-power Sleep Mode (<0.5 mW)
RF Data Channel
Synthesizer Functions
Servo Algebra and OPC Functions
Header Detection for DVD RAM
– Automatic Gain Control or Programmable Gain Mode
– Wide Bandwidth VGA
– VGA Accepts Inputs from 30–300 mV Peak-to-peak Differential (PPD),
– Programmable Equalization via 7th-order Equiripple Filter with Programmable
– Programmable 5-to-1 Filter Cutoff Range
– Data Slicer with DC Restore Circuit
– Wide Frequency Range Clock Extraction
– Frequency Synthesizer with Independent 7-bit M and 6-bit N Dividers,
– Highly Programmable to Accommodate DVD (1–5X) and CD (6–30X)
– Write Asymmetry Measurement for Adjusting Write-mode Power
– Data Recovery Supports CLV, ZCLV, ZCAV Recording
– Optional Internally-generated Timing for AGC and Timing Recovery
– Supports Wobble Clock Synthesis, Using Low-jitter PLL
– 45 MHz Bandwidth for Differential Phase Tracking Detector
– Land and Groove Detector for DVD RAM
– Supports One Beam Push/Pull Tracking Output
– Supports One Beam Differential Phase Tracking
– Supports Three-beam Push/Pull Tracking Output, Using E, F, G, H
– Focus Error Signal Output
– Focus OK Signal
– Track Crossing Detection
– Mirror Signal Output
– Wobble Detection for DVD RAM, DVD-RW, DVD-R
– Detects Tracking Error OK
– Provides Sample and Hold Functions for CD and DVD OPC
– Formats Pre-pit Data, Using Raw Pre-pit Information from AT78C1503
60–600 mV
Symmetric Zeros
Better than 1% Resolution
PPD
or 110–1100 mV
PPD
DVD/CD Read
Channel
AT78C1503
AT78C1507
Rev. 2054A–DVD–07/02
1

Related parts for AT78C1507

AT78C1507 Summary of contents

Page 1

... RAM. The extracted wobble frequency is supplied to the AT78C1507 companion chip which in turn synthesizes the write clock. The AT78C1507 is the companion chip to the AT78C1503 – DVD/CD Read Channel – and the AT78C1504 – DVD/CD Automatic Laser Power Controller. Working in conjunction with the read channel, the AT78C1507 is responsible for wobble clock synthesis for DVD-R and DVD-RAM formats ...

Page 2

... DRAM Flash AT78C1501 ATAPI I/F Controller DBM ECC SRAM ARM7TDMI DVD/CD Read Channel 2 AT78C1502 Servo Power Control Drivers System AT78C1503 AT78C1504 Read Laser Power Channel Controller AT78C1507 Read Channel Adj. Sled Spindle Focus Laser T08XX Laser Amp AT78C1505 Pre-amp 2054A–DVD–07/02 ...

Page 3

Figure 2. AT78C1503 Block Diagram (RF Sequencer) Control 98 AGCLZ AGCHLD 94 VGA RFP/N 2/3 FO1P/N 4/5 VGA FO2P/N 6/7 VGA TR1P/N 8/9 VGA 10/ TR2P/N VGA 11 D/SE D/SE D/SE D/SE FO1-CD 16 FO2-CD 17 TR1-CD 18 TR2-CD 19 ...

Page 4

Figure 3. AT78C1503 Pin-out Table 1. AT78C1503 Pin List DVD/CD Read Channel 4 IDFEILD RFP ...

Page 5

Table 1. AT78C1503 Pin List (Continued) 2054A–DVD–07/02 Pin # Pin Name Type 12 FOHG Digital Input 13 REXT Passive 14 VDD1 3.3V Supply 15 VSS1 0V Supply 16 FO1_CD Analog Input 17 FO2_CD Analog Input 18 TR1_CD Analog Input 19 ...

Page 6

Table 1. AT78C1503 Pin List (Continued) DVD/CD Read Channel 6 Pin # Pin Name Type 48 TOK Digital Output 49 FOK Digital Output 50 MIRROR Digital Output 51 SENA Digital Input 52 SDATA Input/Output 53 SCLK Digital Input 54 VSS4 ...

Page 7

Table 1. AT78C1503 Pin List (Continued) Table 2. Supply Pins 2054A–DVD–07/02 Pin # Pin Name Type 83 TSDDTP1P Test Output 84 TSDDTP2N Test Output 85 TSDDTP2P Test Output 86 CDCRN Diff Passive 87 CDCRP Diff Passive 88 VDD2 3.3V Supply ...

Page 8

... Figure 4. AT78C1507 Block Diagram – Wobble PLL and OPC Sample and Hold DVD/CD Read Channel 8 75 WBLIN Phase/Frequency Q Pump Comparator WOBLE X 186 WOBBLE 1/186 Reg50 SELOPC <3:2> CD/DVD SHCD 37 MUX SHDVD 38 DVDOPC 19 WOBBLE + 180 DEG CDOPC 18 PTSEL 98 PTOP MUX PBOT 94 87 ...

Page 9

... Figure 5. AT78C1507 – Tracking Error Path "E" 4/5 P/N "F" 6/7 P/N Outrigger Signals "G" 8/9 P/N "H" 10/11 P/N SE TP2 28 REFBACK 24 12V TRI2VHIG Reg 56<2> TEG1\I2VLOG TEG1\I2VHIG Reg 68 <3:0> Reg 68 <7:4> POLMB Reg 66 <2> TEMB 25 Pin 25 From 1503 2054A–DVD–07/02 GSEL SHSB BWSEL Reg 49<7:4> Reg 49<3:0> TP2 ...

Page 10

... Figure 6. AT78C1507 Pin-out Table 3. AT78C1507 Pin List DVD/CD Read Channel 10 01 NC0 02 NC1 03 NC2 WBLCOAST 13 REXT 14 VDD1 15 VSS1 16 TLOW2 17 TLOW3 18 CDOPC 19 DVDOPC 20 VDD6 21 SHSB 22 VSS6 23 REFFRONT 24 REFBACK 25 TEMB Pin # Pin Name Type 1 NC0 ...

Page 11

... Table 3. AT78C1507 Pin List (Continued) 2054A–DVD–07/02 Pin # Pin Name Type 12 WBLCOAST Digital Input 13 REXT Passive 14 VDD1 3.3V Supply 15 VSS1 0V Supply 16 TLOW2 0V 17 TLOW3 0V 18 CDOPC Analog Input 19 DVDOPC Analog Input 20 VDD6 3.3V Supply 21 SHSB Digital Input 22 VSS6 0V Supply 23 REFFRONT Input/Output 24 REFBACK ...

Page 12

... Table 3. AT78C1507 Pin List (Continued) DVD/CD Read Channel 12 Pin # Pin Name Type 44 NC4 Digital Output 45 NC9 Digital Output 46 NC10 Digital Output 47 TZC Digital Output 48 TOK Digital Output 49 NC5 Digital Output 50 NC6 Digital Output 51 SENA Digital Input 52 SDATA Input/Output 53 SCLK Digital Input ...

Page 13

... Table 3. AT78C1507 Pin List (Continued) 2054A–DVD–07/02 Pin # Pin Name Type 78 TLOW9 0V 79 TLOW10 0V 80 TLOW11 0V 81 TLOW12 0V 82 TSDDTP1N Test Output 83 TSDDTP1P Test Output 84 TSDDTP2N Test Output 85 TSDDTP2P Test Output 86 SFILTN Diff Passive 87 SFILTP Diff Passive 88 VDD2 3.3V Supply 89 VSS2 ...

Page 14

... Atmel Corporation 2002. Atmel Corporation makes no warranty for the use of its products, other than those expressly contained in the Company’s standard warranty which is detailed in Atmel’s Terms and Conditions located on the Company’s web site. The Company assumes no responsibility for any errors which may appear in this document, reserves the right to change devices or specifications detailed herein at any time without notice, and does not make any commitment to update the information contained herein ...

Related keywords