Servo/System Control Microprocessor; Pin Functions (Ma-316 Boards Ic160) - Sony SLV-E850B Service Manual

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5-6. SERVO/SYSTEM CONTROL MICROPROCESSOR PIN FUNCTIONS
(MA-316 BOARD IC160)
Pin No. Pin Name
1 RF SWP
2 AF REC P
3 N.C.
4 QVD
5 AUTO PRESET
6 FE ON
7 REC CTL
8 CTL RESET
9 CAM 2
10 N.C.
11 TA MUTE
12 SECAM DET
13 NT JUDGE
14 MESECAM DET
15 CIN (REC PRE)
16 AV CONT
17 C+ DET
18 SW1
19 MODE 4
20 MODE 3
TE
L 13942296513
21 MODE 2
22 MODE 1
POWER SAVE
23
CONT 1
POWER SAVE
24
C+
25 MOD CONT
26 SECAM ON
27 N.C.
28 SDA 0
29 N.C.
30 SCL 0
31 A MUTE
32 T/E LED
33 N.C.
34 N.C.
35 CAP STOP
36 FULL ERS
37 N.C.
38 N.C.
39 MP
40 ASURA RESET
41 VSS
42 XTAL
43 EXTAL
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44 ASURA CS
45 S IN 0
.
46 S OUT 0
47 SCLK
48 N.C.
49 N.C.
50 N.C.
http://www.xiaoyu163.com
I/O Function
O RF switching pulse output.
O "H" when HiFi audio REC.
— Not used.
O Quasi VD pulse output.
O "H" during auto preset.
O Flying erase ON/OFF
O REC CTL signal output.
Capstan current control. "H" during
O
slow mode.
I Cam motor control.
— Not used.
O Tuner audio mute. H: Mute
"H" when the SECAM signal is
I
detected.
I 4.43/3.58 judge input.
"H" when the MESECAM signal is
I
detected.
Erasing protection tab, cassette in
I
detection signal input.
O TV/VTR.
I CANAL + detection.
O BG/L control signal.
I Cam encoder signal input.
I Cam encoder signal input.
I Cam encoder signal input.
I Cam encoder signal input.
O –30V Power supply control.
O C+ IC Power supply control.
Tuner modulation output control
O
signal.
O SECAM control signal output.
— Not used.
I/O I 2 C data.
— Not used.
I/O I 2 C clock.
O "H" when audio mute.
O Tape top/end sensors driver.
— Not used.
— Not used.
O Capstan stop signal output.
O Full erase control.
— Not used.
— Not used.
I Fixed to "L".
I System reset signal.
— Ground.
O System clock 16MHz.
I System clock 16MHz.
Servo/system control microcomputer
I
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chip select signal. y
I Serial communication signal.
i
O Serial communication signal.
I Serial communication signal.
— Not used.
— Not used.
— Not used.
http://www.xiaoyu163.com
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8
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
Q Q
3 6 7 1 3 1 5
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
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100 AF SWP
.
5-3
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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.
0 5 8 2 9 9 4 2 8
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.
m
— Not used.
Step pulse "H" when capstan step
O
driving.
O AF switching pulse output.
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