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PDF LC78630E Data sheet ( Hoja de datos )

Número de pieza LC78630E
Descripción Compact Disk Player DSP
Fabricantes Sanyo Semicon Device 
Logotipo Sanyo Semicon Device Logotipo



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No Preview Available ! LC78630E Hoja de datos, Descripción, Manual

Ordering number : EN 5121B
CMOS LSI
LC78630E
Compact Disk Player DSP
Overview
The LC78630E is a CD-DA signal-processing LSI for use
in video CD player systems. The LC78630E incorporates
signal-processing circuits for demodulating and de-
interleaving the EFM signal from the optical pickup, error
detection and correction, and digital filtering. It also
includes a 1-bit D/A converter and executes commands
sent from a system control microprocessor.
Features
• Built-in PLL for EFM signal synchronization (a hybrid
analog-digital PLL that supports 4× playback)
• Built-in PLL for variable pitch playback (±13%)
• 18KB RAM on chip
• Error detection and correction (corrects two errors in C1
and four errors in C2)
• Frame jitter margin: ±8 frames
• Frame synchronization signal detection, protection, and
insertion
• Dual interpolation adopted in the interpolation circuit.
• EFM data demodulation
• Subcode demodulation
• Zero-cross muting adopted
• Servo command interface
• 2fs digital filter
• Digital de-emphasis
• Built-in independent left- and right-channel digital
attenuators (239 attenuation steps)
• Left/right swap function
• Built-in 1-bit D/A converter (third-order ∆∑ noise
shaper, PWM output)
• Built-in digital output circuit
• CLV servo
• Arbitrary track jumping (of up to 255 tracks)
• Variable sled voltage (four levels)
• Built-in oscillator circuit using an external 16.9344 MHz
or 33.8688 MHz (for 4× playback) element
• Supply voltage: 3.6 to 5.5 V (4.5 to 5.5 V for 4×
playback mode)
• Six extended I/O ports and 2 extended output ports
Package Dimensions
unit: mm
3174-QFP80E
[LC78630E]
SANYO: QIP80E
SANYO Electric Co.,Ltd. Semiconductor Bussiness Headquarters
TOKYO OFFICE Tokyo Bldg., 1-10, 1 Chome, Ueno, Taito-ku, TOKYO, 110 JAPAN
83097HA (OT)/D3095HA (OT)/60595HA (OT) No. 5121-1/33

1 page




LC78630E pdf
LC78630E
D/A Converter Analog Characteristics at Ta = 25°C, VDD = 5 V, VSS = 0 V
Parameter
Symbol
Conditions
min typ max Unit
Total harmonic distortion
LCHP, LCHN, RCHP, RCHN; 1 kHz: 0 dB input,
THD + N using a 20-kHz low-pass filter (AD725D built in)
0.006
%
Dynamic range
LCHP, LCHN, RCHP, RCHN; 1 kHz: –60 dB input, using
DR the 20-kHz low-pass filter (A filter (AD725D built in))
90 dB
Signal-to-noise ratio
LCHP, LCHN, RCHP, RCHN; 1 kHz: 0 dB input, using
S/N the 20-kHz low-pass filter (A filter (AD725D built in))
98 100
dB
Crosstalk
LCHP, LCHN, RCHP, RCHN; 1 kHz: 0 dB input,
CT using a 20-kHz low-pass filter (AD725D built in)
96 98
dB
Note: Measured in normal-speed playback mode in a Sanyo 1-bit D/A converter block reference circuit, with the digital attenuator set to EE`p (hexadecimal).
No. 5121-5/33

5 Page





LC78630E arduino
LC78630E
4. Command input
An external controller can execute LC78630E instructions by setting RWC high and inputting commands to COIN in
synchronization with the CQCK clock. Commands are executed on the fall of the RWC signal.
• Single-byte commands
• Two-byte commands
• Command noise reduction
Code
$EF
$EE
Command
COMMAND INPUT NOISE REDUCTION MODE
CLEAR THE ABOVE MODE
RES = low
r
This command can reduce the noise on the CQCK clock signal. While this is effective for noise pulses under
500 ns, the use of this function requires that the CQCK timings tWL, tWH, and tSU (see Figure 1 and 2) be set to
1 µs or longer.
5. CLV servo circuit
• CLV servo circuit; Pin 13: CLV+, pin 14: CLV, pin 15: V/P
Code
$04
$05
$06
$07
Command
DISC MOTOR START (accelerate)
DISC MOTOR CLV (CLV)
DISC MOTOR BRAKE (decelerate)
DISC MOTOR STOP (stop)
RES = low
r
The CLV+ signal causes the disc to accelerate in the forward direction, and CLVcauses the disc to decelerate. The
microcontroller can select one of four modes: accelerate, decelerate, CLV, and stop. The table below lists the states
of the CLV+ and CLVpins in each of these modes.
Mode
Accelerate
Decelerate
CLV
Stop
CLV+
High
Low
Pulse output
Low
CLV
Low
High
Pulse output
Low
Note: The CLV servo control commands only set the TOFF pin low during CLV mode. That pin will be at the high
level at all other times. Thus controlling the TOFF pin with microcontroller commands is only possible in
CLV mode.
No. 5121-11/33

11 Page







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