Akai MPC3000 Service Manual page 52

1-0055
(SMPTE
timecode
reader)
PIN
No.
SYMBOL
FUNCTION
1,
15
GROUND
14,
28
Vcc
— 5VDC
2
ORE
Internal Register
Overflow
3
URE
Internal Register
Underflow
4
SYSCLK
Input
for
system clock-To
10
MHz
5
1NTR
Active
when
a
new Time Code
Word
has been stored
in
the internal
buffer.
6
FWD/REV
Tape
Direction Indicator
HIGH = FWD
LOW = REV
,
7
AO
Output
Word
Select-Selects
which word
is
presented
to
Data Output 00-07
8
A
A0
A1 Output
Word
Selected
0 0
Frame
f§
1
0
1
0
1
1
Seconds
Minutes
Hours
9
RD
Output Enable-Data
is
available at
Data Outputs
00-07
when
RD
is
active.
10
DO
Data Output
0
1
D2 Data Output
2
12
D4
Data Output 4
D6
Data Output
6
16
D7
Data Output
7
17
D5
Data Output
5
18
D3 Data Output
3
19
D1 Data Output
1
20
SYNC
Outputs
a
pulse
two
clock periods
wide when
the
Time Code
SYNC
word
has been read
m
completely.
w
21
DATA
Serial
NRZ
Data Output,
Format:NRZ
1
Level:
TTL
j
22
CLOCK
Time Code Clock
[clock
rate
derived
from Time
Code]
23
TESTEN
Test
Enable-Must
be
HIGH
for
normal
operation
24
TC/UB
Time
code or User
Bits select
Input
HIGH
=
Time Code
LOW
=
User
Bits
25
TIMCO
Longitudinal
Time Code
Input
at
TTL
levels
26
TEST
B
Test
Input
B-Must
be
HIGH
for
normal
operation
i
27
TEST
A
Test
Input
A-Must
be
HIGH
for
normal
operation
35