Terminal Function - Kenwood TS-670 Service Manual

TS-670
CIRCUITDESCRIPTION
CPU-M ICG (/LPD 8049HC-092)
Terminal function
CPU-s IC19 (TMP8049P-3034)
Terminal function
~
4
~
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8
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Terminal
Symbol Explanation
Terminal
Symbol Explanation
No. No.
1
TO Encoder UP/DOWN signal input
21 P20
2 X'taI1
} Microcomputer clock input
22 P21
3 X'tal2 23 P22
I/O EXPANDER control output (lC17)
4 RESET
Microcomputer reset input. Normally "H"
24 P23
5 SS
Normally "H"
25 PROG
6 INT
CPU-S control input
26
VDD
5V Power supply
7 EA
Normaly "L"
27 P10
RAM CE output
8 RD
)o,
28
P11
RAM R/W output
READ: H WRITE: L
9 PSEN 29 P12
1MHz STEP SW input
OFF: H ON: L
10 WR 30 P13
POWER DOWN input
NORM:H
11 ALE
31
P14
) "M 0-
12
DBO 32 P15
IN/OUTPUT
13 DB 1 33 P16
14
DB 2 34 P17
15 DB 3
Data input
35 P24
RAM Address output (A8)
16 DB4
RAM address output (AO
-
7)
36 P25
RAM Address output (A9)
17 DB 5 37 P26
Encoder F.F. Reset output
18 DB 6 38 P27
TX signal input
TX: L RX: H
19
DB 7 39 T 1
Encoder clock output
20 GND
GND terminal 40
V«
5V Power supply
Terminal
Symbol
Explanation
Terminal
Symbol Explanation
No.
NO'
1
TO A/D converter input
21 P20
2
X'tal 1
}Microcomputer clock OSC
22 P21
}./o EX'ANOER 00""" o""' IIC201
3
X'tal2 23 P22
LATCH IC data output
4
RESET Microcomputer reset input. Normally "H"
24 P23
5 SS
Normally"H"
25 PROG
6 INT
Display dinamic drive clock input (1 kHz)
26 VDD
5V Power supply
7 EA
Normally "L" (GND)
27 P10
LSB}
8 RD
)o"
28 P11 USB
MODE output Normally "H"
9 PSEN
29 P12 CW
10 WR
30 P13 AM
11
ALE 31 P14 FM
12 DB 0
32 P15
PLL 1 clock output (lC13)
13 DB 1
!
PCL ".,,,''' ""0 ""
33
P16
PLL 2 clock output (lC4)
14
DB 2
A/D control output
34 P17
PLL 3 clock output (lC3)
15
DB 3
Data input
35 P24
LATCH output
16
DB 4
)CPU-M 0""°1 "'" ",,I
36 P25
CPU-M control output
17 DB 5 37 P26
EXPANDER CHIP SELECT output
18 DB 6 38 P27
CPU-M control input
19 DB 7 39 T 1
PLL UNLOCK input
NOR: H UNLOCK: L
20 GND GND terminal 40
V«
5V Power supply