SAA3323 Просмотр технического описания (PDF) - Philips Electronics

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SAA3323

Drive processor for DCC systems

Philips Electronics 

Philips Semiconductors

Drive processor for DCC systems

Preliminary specification

SAA3323

FEATURES

• Operating supply voltage: 2.7 to 3.6 V

• Low power dissipation: 84 mW (typ)

• Single chip digital equalizer, tape formatting and error

correction

• 8-bit flash analog-to-digital converter (ADC) for low

symbol error rate

• Two switchable Infinite Impulse-Response (IIR) filter

sections

• 10-tap Finite Impulse-Response (FIR) filter per main

data channel, with 8 bit coefficients, identical for all main

channels

• 10-tap FIR filter for the AUX channel

• Analog and digital eye outputs

• Interrupt line triggered by internal auxiliary envelope

processing e.g. label, counter, and others

• Robust programmable digital PLL clock extraction unit

• Low power SLEEP mode

• Slew rate limited Electromagnetic Compatibility (EMC)

friendly output

• Digital Compact Cassette (DCC) optimized error

correction

• Programmable symbol synchronization strategy for tape

input data

• Microcontroller control of capstan servo possible during

playback and recording

• Frequency and phase regulation of capstan servo

during playback

• Choice of Dynamic Random Access Memory (DRAM)

and Static Random Access Memory (SRAM) types for

system Random Access Memory (RAM)

• Scratch pad RAM for microcontroller in system RAM

• Integrated interface for Precision Adaptive Sub-band

Coding (PASC) data bus

• Three wire microcontroller ‘L3’ interface

• Protection against invalid auxiliary data

• Seamless joins between recordings.

GENERAL DESCRIPTION

The SAA3323 performs the drive processor function in the

DCC system. This function is built up of digital equalizer,

error correction and tape formatting functions. The digital

equalizer is intended for use with DCC read amplifiers

TDA1318 or TDA1380. The tape formatting and error

correction circuit is intended for use with PASC ICs

SAA2003 and SAA2013, and write amplifiers TDA1319 or

TDA1381.

ORDERING INFORMATION

TYPE NUMBER

SAA3323H

SAA3323GP

PINS

80

80

PIN POSITION

TQFP80(1)

QFP80(1)

PACKAGE

MATERIAL

plastic

plastic

CODE

SOT315-1

SOT318-2

Note

1. When using reflow soldering it is recommended that the Dry Packing instructions in the “Quality Reference

Pocketbook” are followed. The pocketbook can be ordered using the code 9398 510 34011.

May 1994

2

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