(Ma-286 Board Ic160); Servo/System Control Microprocessor Pin Functions (Ma-286 Board Ic160) - Sony SLV-E325EG Service Manual

6-5. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTIONS

(MA-286 BOARD IC160)

Pin No. Pin Name I/O
1 RF SWP O
2 AF REC P O
3 —
4 QVD O
5 AUTO PRESET O
6 FE ON O
7 REC CTL O
8 CTL RESET O
9 CAM 2 O
10 CAM 1 O
11 TA MUTE O
12 SECAM DET I
13 NT JUDGE I
14 MESECAM I
15 CIN (REC PRF) I
16 AV CONT O
17 N. C. —
18 SW1 O
19 MODE 4 I
20 MODE 3 I
21 MODE 2 I
22 MODE 1 I
23 N. C. —
24 PAL PLUS CONT O
25 N. C. —
26 N. C. —
27 N. C. —
28 SDA 0 I/O
29 N. C. —
30 SCL 0 I/O
31 A MUTE O
32 T/E LED O
33 N. C. —
34 N. C. —
35 CAP STOP O
36 FULL ERS O
37 N. C. O
38 N. C. O
39 MP I
40 ASURA RESET I
41 VSS —
42 XTAL —
43 EXTAL —
44 ASURA CS I
45 S IN 0 I
46 S OUT 0 O
47 SCLK O
48 N. C. —
49 N. C. —
50 N. C. —
Function
RF switching pulse output.
"H" when HiFi audio REC.
Not used.
Quasi VD pulse output.
"H" during auto preset.
Not used.
REC CTL signal output.
Capstan current control. "H" during
slow mode.
Cam motor control.
Cam motor 9V, 12V switch.
Tuner audio mute. H: Mute
"H" when the SECAM signal is
detected.
4.43/3.58 judge input.
"H" when the MESECAM signal is
detected.
Erasing protection tab, cassette in
detection signal input.
On/Off control.
Not used.
Cam encoder signal input.
Cam encoder signal input.
Cam encoder signal input.
Cam encoder signal input.
Not used.
Not used.
Not used.
Not used.
IIC data.
Not used.
IIC clock.
"H" when audio mute.
Tape top/end sensors driver .
Not used.
Not used.
Capstan stop signal output.
Full erase control.
Not used.
Not used.
Fixed to "L".
System reset signal.
Ground.
System clock 16MHz.
System clock 16MHz.
Servo/system control microcomputer
chip select signal.
Serial communication signal.
Serial communication signal.
Serial communication signal.
Not used.
Not used.
Not used.
Pin No. Pin Name
51 SW2
52 AVSS
53 AVREF
54 AVDD
55 NTPB SW
56 AV ADJ
57 N. C.
58 N. C.
59 AF ENV
60 RF ENV
61 T SENS
62 S SENS
63 S REEL FG
64 T REEL FG
65
66 VSYNC
67 PB CTL
68 DRM PG
69 DRM FG
70 CAP FG
71
72 CAP RVS
73 CAP DA
74 DRM DA
75 CTL REC
76 CTL STEP
77 REC COUNT
78 N. C.
79 N. C.
80 DATA (SSB)
81 CLOCK (SSB)
82 N.C.
83 N. C.
84 CAP TRQ PWM
85 N. C.
86 N. C.
87 N. C.
88 VSS
89 VDD
90 5V
91 N. C.
92 CTL GAIN
93 SP
94 N. C.
95 N. C.
96 REC
97 N. C.
98 N. C.
99 STEP PLS
100 AF SWP
6-3
I/O Function
O Tuner select switch.
— Unswitched ground.
— AD port reference input UNSW 5V.
— UNSW 5V.
I NTSC playback switch.
I Adjustment mode.
— Not used.
— Not used.
I HiFi audio playback signal envelope.
I Video playback signal envelope.
I Take-up end sensor.
I Supply end sensor.
I Supply reel FG input.
I Take-up reel FG input.
— Not used.
I Composite sync. signal input.
I Playback CTL input.
I Drum PG input.
I Drum FG input.
I Capstan FG input.
— Not used.
Capstan reverse control "H" when
O
reverse.
O Capstan error D/A output.
O Drum PG input.
O "H" : CTL is recorded.
O CTL amp, STEP operation control.
I Counter signal input when recording.
— Not used.
— Not used.
I/O Serial communication data.
I/O Serial communication clock.
— Not used.
— Not used.
PWM output for capstan torque
O
control.
I Not used.
— Not used.
— Not used.
— Ground.
— 5V.
— 5V.
— Not used.
O CTL amp gain control.
O Normal audio tape speed select.
— Not used.
— Not used.
O "H" output when recording.
— Not used.
— Not used.
O Step pulse "H" when capstan stops.
O AF switching pulse output.