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1C301 SYSTEM CONTROL,TIMER & TUNING CONTROL MPU PIN FUNCTIONS TABLE
T. END S.
HiFi ENV.
L | Sensor signal input for tape end detection.
- | Video head envelope detection signal input for ATR
function.
Hi-Fi audio head envelope detection signa! input for
ATR function. (Hi-Fi model only)
Aa
Name
[vot
VO Signal Function
No]
Name
: vOlWAL
V/O Signal Function
1
H SYNC.
||
- | Syne. signal input for existing channel discrimination
53
SEG
h
O}-
and TV system discrimination:
54 T
SEG
g
O|-
r 2
APC PWM
O| - | Signal to control video recording current EQ-amp.
55
SEG f
O}-
3
ORUM
UP
O}H | Head drum motor rotation speed up signal.
|
56
SEGe
Oj-
4
|SS+DRUMSHIFT
|0/ - | Signal for indicating SLOW/STILL modes and alter-
57
SEGd
O|- | Display segment outputs (FLD).
|
| nation of drum motor control data. (3 value voltage)
58
SEGc
O/- | {Includes key-scan output)
5 | C-VsCUT
O]}H
| Cut off for capstan motor control voltage in SLOW /
59
SEG b
O}-
| |
STILL modes.
60
SEGa
O|-
6
CAP P.
O]}H
| Gain down control for Head Motor at SLOW mode.
61
REW LED
3°
Signal for indicating REW mode.
7
VISS H
|]
| CTL pulse duty detection signal input. Used for VISS
VPS P OFF
fe) rH Signal to disable power LED while OPC-DET is working.
|
detection.
62/|
FF/OPCLED
| O/H
| Signal for indicating FF or OPC mode.
8 i
MC - BR
ie)
Brake signal for capstan motor.
63 jPLAV/ATR LED | O|H
| Signal for indicating PLAY or ATR mode.
9
POS SWO0
|} L | Data indicating operation position of mechanism.
64|
DMSSLED
O |H | Signal for indicating DMSS mode.
{OV : SEARCH,STILL,SLOW,STOP,PLAY, and REC
65 |
KEY INO
-
modes) (5V ;: EJECT,REW, and INITIAL modes)
66 |
KEYIN1
- | Operation key data inputs.
10}
FL- START
1] L | Switch input indicating start of cassette loading or
67
KEY IN2
:
+ SAFETY SW
discharge by cassette mechanism and detecting
168
KEYIN3
1
|-
accidental erasure prevention tab of cassette tape.
69
SAT CS
O |H | Chip enable signal to satellite control IC.
an
vfe
te
70|
SUB BUSY
t]H
| NOT USE
12
RESET
1] L | Initial reset terminal for this tC.
71
SUB CS
O/H | NOT USE
13
CLK 1
- | - | Clock OSC during power failures.
72 T 120 S.DATA
I/O} - | Data exchange with l2C ROM, TUNER and video-audio
14
CLK 2
- | - | Frequency is 32kHz.
Ic,
15
vss
- | - | Ground terminal
[73|
SVS. DATA
O|- | Output 8-bit X 4 serial data giving operation mode and
16
CF
~ | - | IC clock OSC terminal.
tracking data, etc., to digital servo IC.
17
CF2
- | - | Frequency is 8.5MHz.
74
OSD CS
O |H | Chip enable (access) signal output to OSD IC.
18
VOD
- | - | IC power supply terminal. (5Vdc)
POWER OFF MUTE|
H |O |"H" output when power is off, for disable output signal.
19]
POS SW1+2
|| - | Oata indicating operation position of mechanism.
(2V:
75|
SVS.CLK
© | - | The clock puise for digital servo IC.(TUNER,VA-A)
EJECT, REW ,and INITIAL modes) (3.4V: STOP,
76 |COMMON DATA | O | - | Terminal for communication of respective data with
PLAY,REC, and F-SEARCH modes) (2.5V: STILL and
OSD IC,DMSS IC, SAT CTL IC and CH+ IC.
SLOW modes) (5V: R-SEARCH mode)
a
COM SDA!
| -[- | NOT USE
20|
T. REELS.
1
Pulse input for detection of take-up reel table rotation.
78 | COMMON CLK
The clock pulse for TUNER, video-audio IC,OSD IC,
at
T. TOP S.
1] L | Sensor signal input for tape beginning detection.
occa
|
CMSKIPIN | {| - | CM-OET signal input.
79 [TUNER A MUTE | 0 |H | Signal for disable the tuner audio signal.(HiFi set) |
|
[_TuPWM [0]. [Tuning votage ouput (PWM signa). (V-syn model) _ |
Gr [ FSS N 1 [foie mods onl dal pat oa
82 | CH PLUS CLK | 0 [- |The dock pls for CH infut select C (CH mode _
fas} OMSS CLK —[0|- [Clock signal foraudio DMSS unit
fee] Mts 6c DA_[v0]- |
Data signal for MTS decoder.
\vo|
TUNER SENS
| -
NOT USE
85|
MTSISCCLK
|O
Clock signal for MTS decoder.
YCA MUTE
[Oo] H | Signal to disable audio signal output.
86 | SHORT TEST | |
REC mode indication signal input. (NOT USE)
28 [POWER DOWN | || L | Power failure detection terminal.
87
AMUTE
re)
"H" output for disable audio output signal.
29 | TAPE SPEED
|
Input of result of tape speed discrimination by digital
88
CM SKIP PULSE | O
Pulse to sample-hold timing for CM-detector.
servo IC.
89
vss
IC ground terminal.
30
AFT-C
- | Tuner AFT S-curve signal input for tuner AFT control.
90
VOD
-
IC power supply input.(5Vde)
31
C-FGP.
- | FG signal input of capstan motor.
91
PBL
Signal for indicating playback mode.
32 |MESECAM DET
- | NOT USE
92 | ORC VD MUTE
"H" output for disable video output signal during
(
|
I
33
CTL P.
|| - | CTL head recording / playback pulse signal input.
detection of tape character.
34
S REEL P
1) - | NOT USE
93
Rti/R2
Signal for selecting AV-input(video/audio)source.(R1:L)
35
RF SW P.
|| - | RF switching pulse input, created by head drum PG.
94 | POWER LED
NOT USE
36 | REMOCON
| - | Remote control signal input.
95|
POWER UP
"HIGH" output except when power is off. Indicating that
37 | AFT MUTE
O}H | "H" output during TU AFT mute. (V-syn model only)
power is ON.
38
G9
0} -
96
PALH
Signal to indicate "PAL" mode.
39
G8
{ QO; -
97
AV CTL
Audio input source selecting for audio IC.
40
G7?
O| -
98)
ORC PBL
Signal to indicated "ORC PB* mode
41 T
G6
O| -
99
ML- D
Loading motor rotation direction (FWD / REV) indication
42
GS
O|
- | Disptay grid outputs (FLD).
signal.
[43 |
G4
O| -
100
ML-S
Loading motor rotation speed (low / medium / high)
44
G3
oO} -
indication signal.
45
G2
O| -
47
VDD
- | IC power supply input.(5Vdc)
MP_IC301_A
48
V LOAD
- | -23V input for FLD drive.
49
SEGI
|
-
50
SEG k
O}-
51
SEG j
O}| - | Display segment outputs (FLD).
52
SEG
i
10
- | (Includes key-scan output)
vO W-A
[_ TEND Sy)
[GND
Ta]
er
ee 2
Tor
5 fe
[Tt REEL PTs)
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