(Ma-316 Board Ic160); Servo/System Control Microprocessor - Sony SLV-E830B Service Manual

5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTIONS

(MA-316 BOARD IC160)

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 SECAM DET I
13 NT JUDGE I
14 MESECAM DET I
15 CIN (REC PRE) I
16 AV CONT O
17 C+ DET I
18 SW1 O
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 SECAM ON 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 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.
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
"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.
TV/VTR.
CANAL + detection.
BG/L control signal.
Cam encoder signal input.
Cam encoder signal input.
Cam encoder signal input.
Cam encoder signal input.
–30V Power supply control.
C+ IC Power supply control.
Tuner modulation output control
signal.
SECAM control signal output.
Not used.
I 2 C data.
Not used.
2
I 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.
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 FOLLOW TV
58 GND
59 AF ENV
60 RF ENV
61 T SENS
62 S SENS
63 S REEL FG
64 T REEL FG
65 N.C.
66 CSYNC
67 PB CTL
68 DRM PG
69 DRM FG
70 CAP FG
71 SECAM MIX
72 CAP RVS
73 CAP DA
74 DRM DA
75 CTL REC
76 CTL STEP
77 REC COUNT
78 GND
79 DNR RESET
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 REC
97 N.C.
98 N.C.
99 STEP PLS
100 AF SWP
5-3
I/O Function
O BG/L' control signal.
— Unswitched ground.
— AD port reference input UNSW 5V.
— UNSW 5V.
I NTSC playback switch.
I Adjustment mode.
I Synchro-TP detection signal.
— Ground.
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 SECAM MIX control.
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.
— Ground.
O DNR reset signal.
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.