KRC-709,779R/RY,889
6
MICROCOMPUTER'S TERMINAL DESCRIPTION
Pin
Name
I/O
Purpose
Operation Description
76
F-REEL
I
Cassette mechanism reel pulse input (FWD).
Vth = 2.5 V.
77
N.C
I
No connection.
Connected to GND.
78
SRM-DET
I
SRM mechanism detection.
SRM mechanism detected: L.
79
NOISE
I
FM noise detection terminal.
Model without RDS: Connected to GND.
80
S-METER
I
Signal meter detection terminal.
81
R-DATA
I
RDS decoder DATA input terminal.
Model without RDS and
RBDS: Connected to GND.
82
R-QUAL
I
RDS decoder QUAL input terminal.
Model without RDS
and RBDS: Connected to GND.
83
IFC-OUT
I
F/E IFC OUT input terminal.
Station detected: L.
84
MUSIC
I
Music blank detection input.
Music signal detected: L.
Music signal not detected: H.
85
PACK-DET
I
Cassette mechanism pack detection terminal.
Cassette pack detected: L.
Cassette pack not detected: H.
86
DOLBY
O
Dolby ON/OFF switching.
ON: H. OFF: L.
87
R-CLK
I
RDS decoder CLK input terminal.
Model without RDS and
RBDS: Connected to GND.
88
CH-REQC
I
Request input from CH.
ON: L.
89
KEY REQ
I
Communication request from LCD driver.
90
N.C
I
No connection.
Connected to GND.
During TAPE PLAY: L.
91
EQ-MUTE
O
EQ muting switching.
During TAPE FF/REW: H.
Other than TAPE input: H.
92
MTL
O
NORMAL/METAL switching.
NORMAL: H. METAL: L.
Back-Up detected: L.
93
BU-DET
I
Momentary power down detection terminal.
Back-Up not detected
(momentary power down): H.
94
CH-DATAC
I
DATA input terminal from CH.
95
CH-DATAH
O
DATA output terminal to CH.
96
CH-CLK
I/O CLOCK input/output terminal from/to CH.
97
L DATAL
I
DATA line from LCD driver.
98
L DATAS
I/O DATA line to LCD driver.
99
L CLK
I/O CLK line to LCD driver.
100
N.C
O
Outputs Low. No connection.
UPD703033GC050 (IC1: X14)
SYSTEM MICROCOMPUTER
