XR-C8220 Datasheet, PDF (13/14 Pages) Sony Corporation – SERVICE MANUAL

Pin No. Pin Name I/O
Function
68
SUBCE
O Chip enable signal output to the sub electrical volume (IC350) “H” active
69
FLASH-W
I ^{Internal flash memory data write mode detection signal input terminal “L”: data write mode}
Not used (fixed at “H” in this set)
70
IIC SIO
I/O Two-way data bus with the external device Not sued (fixed at “H”)
71
IIC CKO
O Bus clock signal output to the external device Not sued (pull-up)
72
RC-IN1
I Rotary remote commander shift key input terminal “L”: shift
73
X1A
O Sub system clock output terminal (32.768 kHz)
74
X0A
I Sub system clock input terminal (32.768 kHz)
75
DAVN
I ^{Data transmit completed detect signal input from the RDS decoder “H” active}
Not sued (open)
76
KEYACK
I
Input of acknowledge signal for the key entry Acknowledge signal is input to accept function
and eject keys in the power off status On at input of “H”
77
BU-IN
I
Battery detect signal input from the SONY bus interface (IC602) and battery detect circuit
“L” is input at low voltage
78
ILL IN
I
Auto dimmer control illumination line detection signal input terminal
“L” is input at dimmer detection
79
TEL-ATT
I Telephone muting signal input terminal At input of “H”, the signal is attenuated by –20 dB
80
NOSESW
I ^{Front panel block remove/attach detection switch (SW500) input terminal}
“L”: front panel is attached
81
ACC IN
I Accessory detect signal input terminal “L”: accessory on
82 to 85 TIR-D0 to TIR-D3 I/O Two-way data bus with the external device Not used (open)
86
HSTX
I Hardware standby input terminal “L”: hardware standby mode Reset signal input in this set
87
MD2
I Setting terminal for the CPU operational mode (fixed at “L” in this set)
88
MD1
I Setting terminal for the CPU operational mode (fixed at “H” in this set)
89
MD0
I Setting terminal for the CPU operational mode (fixed at “H” in this set)
90
RESET
I ^{System reset signal input from the reset signal generator (IC500) and reset switch (SW800)}
“L”: reset “L” is input for several 100 msec after power on, then it changes to “H”
91
VSS
— Ground terminal
92
X0
I Main system clock input terminal (3.68 MHz)
93
X1
O Main system clock output terminal (3.68 MHz)
94
VCC
— Power supply terminal (+5V)
95
TIR-BUSY
I Busy detection signal input from the external device Not used (fixed at “L”)
96
TIR-WR
O Data write strobe signal output to the external device Not used (open)
97
TIR-CE0
O Chip enable signal output to the external device Not used (open)
98
TIR-CE1
O Chip enable signal output to the external device Not used (open)
99
TIR-RES
O Reset signal output to the external device “H”: reset Not used (open)
100 TIR-PDOWN O Power down control signal output to the external device “L”: power down Not used (open)
101
TIR-RD
O Data read strobe signal output to the external device Not used (open)
102
MTLIN
I Metal detection signal input terminal “L”: normal position, “H”: metal position
103
AMSIN
I ^{Whether a music is present or not from CXA2510AQ (IC250) is detected at auto music sensor}
“L”: music is present, “H”: music is not present
104
REEL
I ^{Rotation detect signal input from supply reel sensor and take-up reel sensor on the deck}
mechanism
105
POS0
I _{Tape position (EJECT/FF/REW/}
POS0: “L”: EJECT mode, “H”: others mode
106
POS1
I _{REV/FWD mode) detect input from POS1: “L”: FF and FWD mode, “H”: others mode}
107
POS2
I ^{the tape operation switch on the deck POS2: “L”: REW mode, “H”: others mode}
108
POS3
I ^mechanism
POS3: “L”: REV and EJECT mode, “H”: others mode
109
LM-EJ
O ^{Motor drive signal output to the loading/tape operation motor drive (IC201) “H” active}
(For the eject direction and reverse side operation) *1
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