Kenwood DP-1100 B Service Manual page 106

2. IC OPERATION OF EACH CIRCUIT AND PIN DESCRIPTION
Pin Signal
Port name
No.
name
24
P22 FSG
P2 P2
25 P23 FSH
26 KOO KSO
27
K01
KS1
KO KO KO KO
28 K02 KS2
29 K03 KS3
35 R80 "IRQ
36
R81 FSEL
R8 R8 R8 R8 R8
37 R82 REM
38 38 R83 R83
TP TP
39 R90 DAT 12
40 R91 DAT21
R9 R9 R9
41 R92 SCK
I/O Initial value
0
FL display tube data (Anode)
* *
FL display tube data (Anode)
0
I Key matrix input data
I Key matrix input data
* * * *
I Key matrix input data
I
Key matrix input data
I/O for control signal of data transmission/reception with IC15 (X32 board).
Outputs the interrupt pulse signal to IC15 (X32) when data is transmitted.
I/O 1
Receives the interrupt pulse signal generated by IC 15 (X32) after completion
of data reception.
Input for A-PAUSE/M-SCAN selection signal.
I 1
Selects the A-PAUSE function at " H " , and the M-SCAN function at " L " .
Input for remote control signal.
I 1 This signal is input in the PPM system using NEC remote control IC
/tPD1943G. Reception processing is made in its reading edge.
TP in ut
input
I/O I/O 1 1
CHIRP output
(Not connected)
I/O for control signal of data transmission/reception with IC15 (X32).
I/O 1
Works for transmission of data signal from IC15 (X32) to IC1 (X25-2020).
I/O for control signal of data transmission/reception with IC15 (X32).
Becomes " H " during transmission of data signal from IC 15 (X32) to IC1
I/O 1
(X25-2020). In reverse communication, works for transmission of data signal
from IC1 (X25-2020) to IC15 (X32).
I/O for control signal of data transmission/reception with IC15 (X32).
I/O
1
Shifts the shift lock signal for data reception (two-way) in units of 4 bits at a
time.
Table 2 - 4 - 1 A
Description
' n p U t t i m e r p ' a y s e l e c t ' o n signal.
^ " H " , timer play function turns OFF.
Output for chirp sound control signal.
Becomes " H " for approx. 0.072 sec after pressing the key.
- H - 3 2
pS
D P - 1 1 0 0 B II
Anode G
Anode H
BitO
Bit 1
Bit 2
Bit 3
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