MN662790RAS1
Pin Descriptions
Pin No.
Symbol
I/O
Function Description
1
BCLK
O
SRDATA bit clock output.
2
LRCK
O
Left/right channel discrimination signal output.
3
SRDATA
O
Serial data output.
4
DV
DD1
I
Power supply for digital circuits.
5
DV
SS1
I
Ground for digital circuits.
6
TX
O
Digital audio interface output signal.
7
MCLK
I
Microcomputer command clock input. (Data is latched at rising edge.)
8
MDATA
I
Microcomputer command data input.
9
MLD
I
Microcomputer command load signal input.
"L" level: load.
10
SENSE
O
Sense signal output. (OFT, FESL, NACEND, NAJEND, SFG, and NWTEND)
11
FLOCK
O
During default operation, focus servo convergence signal.
"L" level: convergence.
During command execution, direction detection output for external track
counter.
12
TLOCK
O
During default operation, tracking servo convergence signal. "L" level:
convergence.
During command execution, traverse speed control output.
13
BLKCK
O
Subcode block clock signal (f
BLKCK
=75 Hz)
14
SQCK
I
External clock input for subcode Q register
15
SUBQ
O
Subcode Q data output
16
DMUTE
I
Muting input. (Effective only for an output bit rate of 64 f
s
) "H" level: muting.
17
STAT
O
Status signal.
(CRC, CLVS, TTSTOP, JCLVS, SQOK, FLAG6, SENSE, FLOCK,
TLOCK, rpm data, and FCLV)
18
RST
I
Reset input.
"L" level: reset.
19
SMCK
O
If MSEL is "H" level, 8.4672 MHz clock signal output.
If MSEL is "L" level, 4.2336 MHz clock signal output
20 CSEL O Oscillation frequency selection: "H" is 33.8688MHz; "L" is 16.9344MHz.
21
TRV
O
Traverse forced feed output.
(tristate)
22
TVD
O
Traverse drive output.
23
PC
O
Spindle motor ON signal.
"L" level: ON (default).
24
ECM
O
Spindle motor drive signal (forced mode output).
(tristate)
25
ECS
O
Spindle motor drive signal (servo error signal output).
(tristate)
26
KICK
O
Kick pulse output.
(tristate)
27
TRD
O
Tracking drive output.
28
FOD
O
Focus drive output.
29
V
REF
I
Reference voltage for DA output (TVD, ECS, TRD, FOD, FBAL, and
TBAL).
30
FBAL
O
Focus balance adjustment output.
31
TBAL
O
Tracking balance adjustment output.
32
FE
I
Focus error signal input. (analog input)
HD750
18
Summary of Contents for HD750
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Page 55: ...HD750 MAINBOARD 55...
Page 56: ...HD750 CONTROL PANEL 56...
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Page 58: ...HD750 REMOTE UNIT 58...
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Page 60: ...DISPLAY PANEL PCB POWER SWITCH PCB HEADPHONES PCB HD750 60...
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