lc89602 Sanyo Semiconductor Corporation, lc89602 Datasheet

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lc89602

Manufacturer Part Number
lc89602
Description
Audio Decoder Lsi For Mini-disk Playback
Manufacturer
Sanyo Semiconductor Corporation
Datasheet
Ordering number : EN*5059A
Preliminary
Overview
The LC89602 is an audio decoder LSI for mini-disk
playback units. This LSI implements the processing that
precedes the D/A converter in playback-only mini-disk
players. That is, the LC89602 receives data in sound
frame units from a mini-disk data decoder LSI (such as
the Sanyo LC89610), expands the audio signal and
decoder that signal directly to a D/A converter. This audio
expander LSI accepts audio data that has been compressed
by a factor of about 5 to 1, and expands that data to audio
data that is equivalent to that from a CD player, namely
16-bit quantized data with a 44.1 kHz sampling frequency.
Since this expansion consists of complex operations
involving discrete cosine transformations and digital
filtering, if the computations performed on this 16-bit data
were performed with a 16-bit precision, the arithmetic
errors associated with the calculations would result in
arithmetic noise in the lower bits and a full 16 bits of
precision would not be acquired. Inversely, increasing the
number of registers and the bus width to improve the
precision of the arithmetic would increase the size of the
circuit and the power required. The LC89602 was
optimized to achieve both the low power required by
portable units as well as the high-precision arithmetic
required by home units.
Features
• Stereo audio expansion implemented in a single chip
• High-precision arithmetic using a 24-bit multiplier
• Expanded dynamic range provided by a block floating-
• Two output systems and independent attenuators built in
• Digital audio outputs with a 20-bit data width and
• Low power design implemented in a 0.8 µm CMOS
• CCB CPU interface
• Low-voltage operation (V
• Package: QIP80E
point circuit
digital audio interface outputs
process
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
DD
= 3.6 to 5.5 V)
Audio Decoder LSI for Mini-Disk Playback
Package Dimensions
unit: mm
3174-QFP80E
[LC89602]
N2494MO No. 5059-1/6
LC89602
SANYO: QIP80E
CMOS LSI

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lc89602 Summary of contents

Page 1

... The LC89602 is an audio decoder LSI for mini-disk playback units. This LSI implements the processing that precedes the D/A converter in playback-only mini-disk players. That is, the LC89602 receives data in sound frame units from a mini-disk data decoder LSI (such as the Sanyo LC89610), expands the audio signal and decoder that signal directly to a D/A converter ...

Page 2

... Except for RESET, CCB, CE, CL, and TP0 IH Input low-level voltage V 2 Except for RESET, CCB, CE, CL, and TP0 IL Output high-level voltage Output low-level voltage LC89602 = 0 V Symbol Conditions max Ta = 25° 25° Topr Tstg 10 seconds (pins only) ...

Page 3

... Block Diagram LC89602 No. 5059-3/6 ...

Page 4

... Pin Assignment LC89602 No. 5059-4/6 ...

Page 5

... CLKI I System clock input 44 — — Unused 45 BDOUT O Serial audio data output B 46 ADOUT O Serial audio data output A 47 LRCO O LR clock output 48 WDCO O Word clock output 49 BCO O Bit clock output 50 ENH O De-emphasis specifier output LC89602 Function Continued on next page. No. 5059-5/6 ...

Page 6

... SANYO believes information herein is accurate and reliable, but no guarantees are made or implied regarding its use or any infringements of intellectual property rights or other rights of third parties. This catalog provide information as of September, 1995. Specifications and information herein are subject to change without notice. LC89602 Function PS No. 5059-6/6 ...

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