Sony DTC-670 Service Manual page 49

Pin No. Pin Name
ao
Connected to
Description
I
2
J
4
5
o
o
o
o
o
Line Out
Clock IC
Not in use
Line Mute (Active "L")
Not in use
Not in use
Write request (Active "L")
6
7 - 1 0
l l - 1 4
I 5 - 1 8
l 9
20
RD
ADRS-3-O
DATA-7-4
DATA 3.0
ÂTÎ-exr
D-rcnNn
o
o
VO
tlo
o
o
Clock IC
Clock IC
Clock IC
cxDl l36Q
cxDr l36Q
Read request (Active "L")
Address 3-0 (Address BUS)
DATA 74 (DATA BUS). Not in use with the equipment
DATA 3-O (DATA BUS)
Fade anenuator ck extemally selected (Active "L")
Fade ldOut switching for DIG C'L")/ANA C'H')
2 l
22
23
24
25
REC/PB
ATT-CK
o-tn
ôrvcon
FS32
o
o
o
o
o
cxDr r36Q
cxDr l36Q
cxD260lAQ
Digital I/O
lBir DAC
Fade lry'Out REC switching for ("L")/PB ("H')
Clock for fade IrVOut
Audio use ("H")/Data Recorder use ("L). Becomes "L" in after-recording and
searching.
Switching for Optical ('L")/Coaxial ("H")
"H" upon Fs = 32kHz. "L" forothers.
26
27
28
29
30
o
o
o
o
o
Display Micon
cxD260lAQ
Mechanism
Micon
Clock IC
Not in use
Request for communication with the Display Micon ("L" Active)
Request for communication with CXD260I ("L" Active)
Request for communication with the Mechanism Micon ('L" Active)
Clock IC chip selected
J I
32
33
34
35
MP
fsr
Vss
XTAL
EXTAL
I
I
;
I
cxD260lAQ
Microprocessor mode selected (fixed at "L" with the equipment)
System Reset ("L" Active)
Power terminal (GND)
System Clock Output (Not in use)
System Clock Input (9.048 MHz)
36
' T
38
39
40
DISP-ACK
DISP DT I
DISP-DT-O
DISP CK
sEsv
I
I
o
I
I
Display Micon
Display Micon
Display Micon
Display Micon
cxD260lAQ
ACKnowledge (Active "L")
Serial Input
Serial Output
Serial clock
Subcode sync
4 l
42
43
4
45
SR-DT-IN
SR-DT-OUT
SR-CK
AVss
AVref
I
o
VO
Serial Data In
Serial Data Out
Serial clock (ln/Ouù to Sub Code Interface
GND forA/D
Reference Voltage for A/D (+5 V)
6
47
48
49
50
AVdd
Fusv
AU-BUS-IN
I
I
I
I
Mechanism
Micon
Audio Bus
Power Supply for A/D (+5 V)
Not in use
Not in use
Mechanism servo micon Busy (Active "L")
Not in use
lGll2 Main Micon (CXP8O524-0AO)
This Micon generally controls the operation of the equipment while exchanging datd with the display micon (IC701) and mechanism/servo micon
(IC3l l) in serial communications, including the DAT signal processor (1C307), digital filter (IC363) and other IC.
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