Sanyo LC8955 Specifications

Any and all SANYO products described or contained herein do not have specifications that can handle applications that require extremely high levels of reliability, such as life-support systems, aircraft’s control systems, or other applications whose failure can be reasonably expected to result in serious physical and/or material damage. Consult with your SANYO representative nearest you before using any SANYO products described or contained herein in such applications.
SANYO assumes no responsibility for equipment failures that result from using products at values that exceed, even momentarily, rated values (such as maximum ratings, operating condition ranges,or other parameters) listed in products specifications of any and all SANYO products described or contained herein.
CMOS IC
CD-I Format ADPCM Data Replay IC
Ordering number:ENN3215B
LC8955
SANYO Electric Co.,Ltd. Semiconductor Company
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-8534 JAPAN
Overview
The SANYO LC8955 is a stereo/mono replay IC for CD-I format ADPCM data. In addition to an ADPCM decoding circuit, the LC8955 also incorporates a DMA interface, buffer RAM interface and a D/A converter serial interface. The LC8955 interfaces directly with the SANYO LC8951 Real-time Error-correction and Host Interface Processor, allowing a CD-I replay system to be configured easily. The LC8955 is designed to operate with a host micropro­cessor which sets the operating mode. It operates from a single 5V supply, and is available in 80-pin plastic QIPs.
Features
• Real-time ADPCM decoder IC.
• Direct interface to SANYO’s LC8951 error-correction IC for high-speed data transfer.
• Data transfer under program or DMA control.
• Independent data and control busses in auto-request trans­fer.
• 8K byte external static RAM interface.
• Buffers up to 64 ADPCM sound groups in external RAM.
• DAC interface circuit.
• 80-pin plastic QIP.
Functional Description
The LC8955 is divided into three major functional blocks.
ADPCM Input Block
The ADPCM input block has three data input modes, se­lected by setting internal registers. ¡ Auto-request transfer
Data is transferred automatically into the LC8955’s data port without CPU intervention. A number of handshak­ing signals control data transfer. The input device can be an LC8951 Real-time Error-correction and Host In­terface Processor or another CD-ROM output device.
Program transfer
The CPU writes each byte of data directly into the LC8955 under program control. Data is transferred us­ing the CPU data bus.
£ DMA transfer
Data is written into the LC8955 by an external DMA controller using the CPU data bus. Up to 64 ADPCM sound groups can be written to an external 8K byte buffer RAM. One sound group consists of 128 bytes of CD-I data. The LC8955 then decodes data in the buffer without intervention from the CPU or DMA controller, leaving these devices free for other tasks.
Package Dimensions
unit:mm
3044B-QIP80A
[LC8955]
20.0
14.0
3.0
1.0
0.35
0.8
1.0
26.0
20.0
0.8
0.8
64
65
80
1
0.35
22.6
3.0
0.8
0.15
41
40
25
24
2.45max
1.7
SANYO : QIP80A
2.15
1.7
16.6
1.7
62501TN (KT)/8030JN, TA/3260YT/D119TA, TS (US) No.3215–1/4
LC8955
Decoder Block
The decoder block converts the ADPCM data into 16-bit linear PCM data. Decoding parameters can either be set by the CPU, or read from subheader information in the ADPCM data stream.
DAC Interface Block
Two output formats are available. The first is suitable for input to SANYO’s LC7833, 7833M DA converters, and the second is the standard CD-I format. The output circuit will also accept CD-DA format input data and, by setting an LC8955 internal register, switch it through to the output pins without processing.
Specifications
Absolute Maximum Ratings at VSS = 0V
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erutarepmetegarotSgtsT –521+ot55
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Allowable Operating Conditions at Ta = –30 to +70˚C, VSS = 0V
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DC Characteristics at Ta = –30 to +70˚C, VSS = 0V, VDD = 4.5 to 5.5V
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2.2V
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8.0V
6.0V
No.3215–2/4
LC8955
Pin Assignment
T ype I : Input pin O : Output pin B : Bidirectional pin P : Power supply pin NC : No connection
Note) All VDD and VSS pins should be connected to the
positive supply or ground.
.oNemaNniPepyT 12TI 21TI 3TESTUOI 4V
SS
521AO 611AO 701AO 89AO 98AO
017AO 116AO 215AO 31V
SS
414AO 513AO 612AO 711AO 810AO 91BEWMO 02BSCMO 12V
SS
227OIB 326OIB 425OIB 524OIB 623OIB 722OIB 821OIB 920OIB 037DDI 13V
DD
236DDI 335DDI 434DDI 533DDI 632DDI 731DDI 830DDI 93GALFEI 04BDAERO
P
P
P
P
.oNemaNniPepyT 14BTIAWI 24KCMI 34BNETDI 44BPOEI 547DSB 646DSB 745DSB 844DSB 943DSB 052DSB 151DSB 25V 350DSB 451ASI 550ASI 65BSCI 75BDRI 85BRWI 95YSUBO 06LLUFFUBO 16WOLFDNUO 26PMEATADO 36SAHPMEMO 46LPSTIBMO 56QRFLPSMO 66NOMETSMO 76BTESERI 86KLCRLO 96KLCWO 07ATADO 17KLCBO 27KLCRLCI 37V 47KLCWCI 57ATADCI 67KLCBCI 77BQERO 87BKCADI 97BYDAERO 08BENODI
SS
DD
P
P
System Diagram
No.3215–3/4
Block Diagram
LC8955
Specifications of any and all SANYO products described or contained herein stipulate the performance, characteristics, and functions of the described products in the independent state, and are not guarantees of the performance, characteristics, and functions of the described products as mounted in the customer's products or equipment. To verify symptoms and states that cannot be evaluated in an independent device, the customer should always evaluate and test devices mounted in the customer's products or equipment.
SANYO Electric Co., Ltd. strives to supply high-quality high-reliability products. However, any and all semiconductor products fail with some probability. It is possible that these probabilistic failures could give rise to accidents or events that could endanger human lives, that could give rise to smoke or fire, or that could cause damage to other property. When designing equipment, adopt safety measures so that these kinds of accidents or events cannot occur. Such measures include but are not limited to protective circuits and error prevention circuits for safe design, redundant design, and structural design.
In the event that any or all SANYO products(including technical data,services) described or contained herein are controlled under any of applicable local export control laws and regulations, such products must not be exported without obtaining the export license from the authorities concerned in accordance with the above law.
No part of this publication may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, or any information storage or retrieval system, or otherwise, without the prior written permission of SANYO Electric Co. , Ltd.
Any and all information described or contained herein are subject to change without notice due to product/technology improvement, etc. When designing equipment, refer to the "Delivery Specification" for the SANYO product that you intend to use.
Information (including circuit diagrams and circuit parameters) herein is for example only ; it is not guaranteed for volume production. 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 provides information as of June, 2001. Specifications and information herein are subject to change without notice.
PS No.3215–4/4
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