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PDF LC895297 Data sheet ( Hoja de datos )
| Número de pieza | LC895297 | |
| Descripción | Full CAV 20 x CD-ROM Decoder with Built-in ATA-PI (IDE) Interface and CD-DSP | |
| Fabricantes | Sanyo | |
| Logotipo |  |
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Ordering number : EN*5785
Preliminary
CMOS LSI
LC895297
Full CAV 20× CD-ROM Decoder with
Built-in ATA-PI (IDE) Interface and CD-DSP
Overview
The LC895297 is a single-chip CD-ROM decoder and
CD-DSP system that supports full CAV 20× operation and
includes a built-in ATA-PI (IDE) interface.
Functions
• Full CAV 20× CD-DSP and CD-ROM decoder
functions with built-in ATA-PI (IDE) interface
Features
[CD-ROM Decoder and ATA-PI (IDE) Interface Blocks]
• Full CAV 20× operation
• ATA-PI (IDE) interface
• Supports the use of EDO DRAM.
• Supports the use of up to 4 Mbits of buffer RAM.
• The user can set up arbitrary CD main channel and C2
flag areas in buffer RAM.
• Batch transfer function (function that automatically
transfers the CD main channel and C2 flag data in a
single operation.)
• Multi-block transfer function (function that
automatically transfers multiple blocks in a single
operation.)
• DVD ECC interface
• Intelligent functions
[CD-DSP Block]
• The IC inputs a high-frequency signal, slices that signal
at the correct level, converts that result to an EFM coded
signal, and compares the phase with that of the built-in
VCO.
• Uses an external 16.9344-MHz crystal element to
generate a standard clock and to correctly generate the
required internal timings.
• Performs frame synchronization, signal detection,
protection, and insertion, and assures stable data
readout.
• Demodulates the EFM coded signal to produce 8-bit
symbol data.
• After applying a CRC check to the subcode Q signal,
outputs that signal to a microprocessor over a parallel
I/O channel.
• Performs unscrambling and de-interleaving to reorder
the demodulated EFM signal in the prescribed manner.
• Performs error code detection and correction, and flag
processing. (C1: dual errors, C2: four errors)
• Sets the C2 flags based on the C1 flags and a C2 check,
and performs interpolation or muting depending on the
C2 flags. Adopts a 2-point interpolation circuit, and
converges the signal to the muting level if the C2 flags
indicate over 2 consecutive uncorrectable errors.
• Accepts the input of commands from a control
microprocessor over an 8-bit parallel interface. Supports
track jump, disc motor start/stop, muting on/off, and
track counting commands.
• Can perform arbitrary track counts.
• Includes CAV audio functions.
• Adopts zero-cross muting.
• Includes 8× oversampling digital filters.
• D/A converter with PWM output.
• Includes independent left and right channel digital
attenuators.
• Provides digital deemphasis.
• Supports bilingual functions.
Package Dimensions
unit: mm
3230-SQFP176
[LC897297]
SANYO: SQFP176
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110-0005 JAPAN
22898HA (OT) No. 5785-1/9
1 page  
LC895297
Pin Functions
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
Pin name
AVSS0
R0
VCNT0
PDO0
TEST0
TEST1
IOP0 (HDB7)
IOP1 (HDB6)
IOP2 (HDB5)
IOP3 (HDB4)
IOP4 (HDB3)
IOP5 (HDB2)
IOP6 (HDB1)
IOP7 (HDB0)
VDD2
TEST3
TEST4
DRESP
DREQ
RCHP
RCHN
VDD1
VSS1
LCHP
LCHN
VSS0
XTALCK
XTAL
VSS0
ZRSTCPU
ZRSTIC
ZRESET
D7
D6
D5
D4
D3
D2
D1
D0
I : Input pin, O: Output pin, B : Bidirectional pin, P: Power supply pin, NC: Not connected
Type
P
I
I
O
I
I
B
B
B
B
B
B
B
B
P
I
I
I
O
O
O
P
P
O
O
P
I
O
P
NC
O
O
I
B
B
B
B
B
B
B
B
VCO bias resistor connection
VCO control voltage input
Charge pump output
Test pins
Function
General-purpose I/O ports
These pins are used for DVD ECC data input when the DVD interface is used.
4.0 V
Test pin
Test pin
DVD ECC data latch signal input
DVD ECC data request output
1-bit D/A converter right channel P output
1-bit D/A converter right channel N output
1-bit D/A converter left and right channel power supply
1-bit D/A converter right channel ground
1-bit D/A converter left channel P output
1-bit D/A converter left channel N output
Crystal oscillator circuit input (16.9344 MHz)
Crystal oscillator circuit output
CPU reset signal output
Drive IC reset signal output
IC reset input
Microcontroller data signal connection.
These pins include built-in pull-up resistors.
Continued on next page.
No. 5785-5/9
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet LC895297.PDF ] | |
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