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參數(shù)資料
| 型號： | LC78681E |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | QFP-64 |
| 文件頁數(shù)： | 21/23頁 |
| 文件大小： | 241K |
| 代理商： | LC78681E |
Continued from preceding page.
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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