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LC78681E 数据表(PDF) 7 Page - Sanyo Semicon Device

部件名 LC78681E
功能描述  Digital Signal Processor for Compact Disc Players
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制造商  SANYO [Sanyo Semicon Device]
网页  https://www.sanyo-av.com/us/
标志 SANYO - Sanyo Semicon Device

LC78681E 数据表(HTML) 7 Page - Sanyo Semicon Device

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Functional Description
HF Signal Input Circuit (pin 8: EFMIN, pin 7: EFMO and pin 6: EFMO)
An EFM signal (NRZ) sliced at the optimum level is obtained when the HF signal is input on EFMIN.
No. 4521-7/23
LC78681E
No.
Name
I/O
Description
38
LRSY
O
39
CK2
O
40
ROMOUT
O
For output of CD-ROM interface signals.
41
C2FCLK
O
42
C2F
O
43
DOUT
O
Digital OUT output
44
SBSY
O
Subcode block synchronization output
45
EFLG
O
C1 and C2 single and double error correction flag.
46
PW
O
47
SFSY
O
48
SBCK
I
49
FSX
O
7.35 kHz synchronization signal output
50
WRQ
O
51
RWC
I
52
SQOUT
O
53
COIN
I
54
CQCK
I
55
RES
I
Set to low at powerup.
56
M/L
I
Same as for pins 50 to 54.
57
LASER
O
Permits control via serial control from the microprocessor.
58
16 M
O
16.9344 MHz output pin
59
4.2 M
O
4.2336 MHz output pin.
60
CONT
O
Permits control via serial control from the microprocessor.
61
TEST5
I
LSI test input. Normally unconnected.
62
CS
I
Chip select pin. The LC78681 is active when this pin is low (on-chip pull-down resistor).
63
XIN
I
16.9344 MHz crystal oscillator connection pins.
64
XOUT
O
SFSY is subcode frame synchronization signal. P, Q, R, S, T, U, V, and W subcodes are read out by sending clock
eight times to SBCK.
WRQ goes high when Q subcode data passes the CRC check. Through external connection and sending of CQCK,
data is read from SQOUT. Set MSB-first/LSB-first to low when data in LSB-first format is desired.
Command is generated by sending output synchronized with CQCK command data after setting microprocessor RWC
to high.


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