Kenwood DP-1100 B Service Manual page 95

D P - 1 1 0 0 B II
2. IC OPERATION OF EACH CIRCUIT AND PIN DESCRIPTION
Pin f u n c t i o n s
Signal
Pin No. Port name
name
9 RO SVC (A)
10 R1 SVC (B)
11 R2 SVC (C)
12 R3
13 TEP
R4
14 R5 RFES
1 R6 CIER
2 R7 COFS
3 R8 EOF*
4 R9 EOF*
5 R10 STAT
6 R11 EXSEL
7 CK2M
8 V „
15 RESET
-
16
98
I/O Initial value
0
Output for focus offset amount control data to Q102 (SVC circuit)
0 Output for focus offset amount control data to Q102 (SVC circuit)
0 0
Output for focus offset amount control data to Q102 (SVC circuit)
0
0
Output for focus offset amount control data to Q102 (SVC circuit)
Input for focus offset amount 1-level shift request signal.
I 1
During execution of kick operation, becomes " L " to perform 1-level shift.
Input for SVC operation (counting the number of errors) halts request signal.
I 1
When track jump occurs, becomes " H " . After that, stops operation for 1.2 msec.
Input for block error signal from IC11.
I 1
When block error occurs, becomes " H " .
Input for corrected frame period signal (7.35 kHz square wave) from IC6.
I 1
At the point when it becomes " H " signal CIER is judged.
Output for focus offset amount control data to Q102
0 1
(TC4051BP) Not used.
0 1 Not used. Grounded.
SVC operation start/stop control, which is connected to IC15 (TMP4740N).
When a " H " signal is input, operation starts, while when a " L " signal is input, operation
I/O 1
stops. In addition, when offset amount adjustment is complete, it output a " L " signal
with a duration of 3.4 msec.
I 1 Not used. Grounded.
Clock pulse input.
I
GND pin
I Initialize signal input.
Power
Power supply ( + 5 V) pin.
supply
Table 2 - 3 - 5 A
Description
bit 0
bit 1
bit 2
bit 3
bit 1