Kenwood KRC-225 Service Manual page 6

KRC-225/235/265/265S
MICROCOMPUTER'S TERMINAL DESCRIPTION
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Terminal Description ( IC1 : X14-6850-XX)
Pin No. Pin Name
61 ACC DET
62 B.U. DET
63 S METER
64 PANEL
65 GND
66 GND
67 HOLD
68 VDD
69 GND
70 GND
71,72 -
73 VDD
74 GND
75 GND
76 VSS
77,78 -
79 GND
80 XOUT
6
I/O Description
I ACC detection input
I Momentary power down detection input
I S-meter input from the F/E
I Panel detaching detection input
I -
I -
I MI-COM. HOLD input
- VDD connection terminal
I -
I -
O -
- Positive power supply connection terminal Connected to B.U. 5V lines.
I -
I -
- Ground connection terminal
O -
- TEST terminal 1
O Main clock resonator connection terminal
Processing Operation
Hi : ACC ON
Hi : When momentary power down detected or
B.U. OFF, Lo : B.U. ON
Lo : Panel not detached
Connected to GND lines.
Connected to GND lines.
Lo : Hold
Connected to B.U. 5V lines.
Connected to GND lines.
Connected to GND lines.
N.C.(Not used)
Connected to GND lines.
Connected to GND lines.
Connected to GND lines.
N.C.(Not used)
Connected to GND lines.