(Ma-335 Board Ic161); Servo/System Control Microprocessor Pin Functions (Ma-335 Board Ic161) - Sony SLV-M10HF Service Manual

5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTIONS

(MA-335 BOARD IC161)

Pin No. Pin Name I/O
1 RF SWP O
2 AF REC P O
3 N.C. —
4 QVD O
5 AUTO PRESET O
6 FE ON O
7 REC CTL O
8 CTL RESET O
9 CAM 2 I
10 N.C. —
11 TA MUTE O
12 S-VHS I
13 NT JUDGE I
14 MESECAM DET I
15 CIN (REC PRF) I
16 AV CONT O
17 SECAM ON —
18 SW1 —
19 MODE 4 I
20 MODE 3 I
21 MODE 2 I
22 MODE 1 I
POWER SAVE
23 O
CONT 1
POWER SAVE
24 O
C+
25 MOD CONT O
26 TV/VTR O
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. —
38 N.C. —
39 MP I
40 ASURA RESET I
41 VSS —
42 XTAL O
43 EXTAL I
44 ASURA CS I
45 S IN 0 I
46 S OUT 0 O
47 SCLK I
48 NICOL ON O
49 CBC POWER O
50 F. MONO O
Function
RF switching pulse output.
"H" when HiFi audio REC.
Not used.
Quasi VD pulse output.
"H" during auto preset.
Flying erase ON/OFF
REC CTL signal output.
Capstan current control. "H" during
slow mode.
Cam motor control.
Not used.
Tuner audio mute. H: Mute
S-VHS tape detection signal in.
Not used.
Not used.
Erasing protection tab, cassette in
detection signal input.
Not used.
Not used.
Not used.
Cam encoder signal input.
Cam encoder signal input.
Cam encoder signal input.
Cam encoder signal input.
Not used.
Not used.
Not used.
TV/VTR control signal output.
Not used.
2
I C data.
Not used.
I 2 C 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.
NICOL control signal out.
Cable box control signal out.
Forced mono.
Pin No. Pin Name
51 SW2
52 AVSS
53 AVREF
54 AVDD
55 NTPB SW
56 AV ADJ
57 FOLLOW TV
58 N.C.
59 AF ENV
60 RF ENV
61 T SENS
62 S SENS
63 S REEL FG
64 T REEL FG
65 N.C.
66 VSYNC
67 PB CTL
68 DRM PG
69 DRM FG
70 CAP FG
BLUE BACK
71
ON
72 CAP RVS
73 CAP DA
74 DRM DA
75 N.C.
76 N.C.
77 REC COUNT
78 C PLUS DET
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 HYS HIGH
93 N.C.
94 N.C.
95 N.C.
96 AF REC
97 N.C.
98 N.C.
99 STEP PLS
100 AF SWP
5-3
I/O Function
O Not used.
— Unswitched ground.
— AD port reference input UNSW 5V.
— UNSW 5V.
I Not used.
I Adjustment mode.
I 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.
O Not used.
Capstan reverse control "H" when
O
reverse.
O Capstan error D/A output.
O Drum PG output.
— Not used.
— Not used.
I Counter signal input when recording.
O Not used.
— Not used.
O Serial communication data.
O Serial communication clock.
— Not used.
— Not used.
PWM output for capstan torque
O
control.
— Not used.
— Not used.
— Not used.
— Ground.
— 5V.
— 5V.
— Not used.
O CTL amp gain control.
— Not used.
— Not used.
— Not used.
O "H" output when hifi audio recording.
— Not used.
— Not used.
Step pulse "H" when capstan step
O
driving.
O AF switching pulse output.