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KRC-778R/RV/RY/RYV,878R,PS978R
MICROCOMPUTER TERMINAL DESCRIPTION
UPD784217GC103(105) (IC1: X14-618X-XX)
System MicroComputer
Pin
Pin Name
52 P84/A4
53 P85/A5
54 P86/A6
55 P87/A7
56 P40/AD0
57 P41/AD1
58 P42/AD2
59 P43/AD3
60 P44/AD4
61 P45/AD5
62 P46/AD6
63 P47/AD7
64 P50/A8
65 P51/A9
66 P52/A10
67 P53/A11
68 P54/A12
69 P55/A13
70 P56/A14
71 P57/A15
72 Vss
73 P60/A16
74 P61/A17
75 P62/A18
76 P63/A19
77 P64/RD
78 P65/WR
79 P66/WAIT
80 P67/ASTB
81 Vdd
82 P100/TI5/TO5
83 P101/TI6/TO6
84 P102/TI7/TO7
85 P103/TI8/TO8
86 P30/TO0
87 P31/TO1
88 P32/TO2
89 P33/TI1
90 P34/TI2
91 P35/TI00
92 P36/TI01
93 P37
94 TEST
95 P90
96 P91
97 P92
98 P93
99 P94
100 P95
4
Signal Name
I/O
WIDE
O
K2I Forced Wide output.
NARROW
I/O K2I Forced Narrow output.
AFC
I
Noise detection time constant SW
SRM_SW2
I
SRM eject position detection.
QUAL
I
RDS reception quality.
R_DATA
I
RDS data input.
SRM_DET
I
SRM mechanism detection.
FM_SD
I
FM SD input.
N.C.
O
MUSIC
I
Blank detection input.
B/C
O
Dolby B/C switching.
Dolby
O
Dolby output.
EQ_MUTE
O
EQ muting output.
MTL
O
Metal output.
F/R
O
Tape EQ input switching.
Blank detection time constant
MSC
O
switching.
MODE3
I
Cassette mechanism mode detection.
MODE1
I
Cassette mechanism mode detection.
MODE2
I
Cassette mechanism mode detection.
PACK_DET
I
Cassette mechanism pack detection.
GND
-
GND terminal.
TYPE0
I
Destination type terminal 0.
TYPE1
I
Destination type terminal 1.
TYPE2
I
Destination type terminal 2.
ST_TYPE0
I
IC2 Ver.3 destination type terminal 0.
ST_TYPE1
I
IC2 Ver.3 destination type terminal 1.
N.C.
O
Not used.
N.C.
O
Not used.
N.C.
O
Not used.
Vdd
-
B.U.5V
SVR
O
SVR discharge control.
PREMUTE
O
PRE mute.
PMUTE
O
Power IC muting.
Cassette mechanism / SRM
CASS/SRM
O
mechanism voltage SW terminal.
ANT_CON
O
Antenna control.
AM+B
O
AM power supply.
FM+B
O
FM power supply.
P_CON
O
Power control.
ACC_DET
I
Acc detection.
REMO
I
Remote control input.
P_ON
O
Power supply control.
BU_DET
I
Momentary power down detection.
TEST
-
Test terminal.
IC2_SDA
I/O IC2, IC5 and EEPROM data line.
IC2_SCK
O
IC2, IC5 and EEPROM clock line.
MUTE
O
Muting terminal.
SW5V
O
5 V power supply.
N.C.
O
Not used.
N.C.
O
Not used.
Purpose
H:Forced Wide
H:Forced Narrow
During reception: Hi
/During search: Lo.
EJECT:Hi
Detected: Lo /Not detected: Hi.
Station detected: Hi
/Not detected: Lo.
Music detected: Lo
/Music not detected: Hi.
B = Lo, C = Hi
ON : Hi, OFF : Lo
During play: Lo /FF or REW:
NOMAL : Hi, METAL : Lo
FWD:Lo, REW:Hi
During play: Hi /FF or REW:
Lo.
Pack detected: Lo.
POWER OFF:Hi
Active: Lo.
P IC ON : Hi
C mech.:Hi, SRM mech.:Lo
Active: Hi.
Active: Hi.
Active: Hi.
Active: Hi.
Acc OFF:Hi.
POWER ON:Hi
Power down: Hi.
OPEN:MUTE ON
Lo=SW5 ON
Operation Description
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