Key0 - Onkyo TX-SR573 Service Manual

MICROPROCESSOR TERMINAL DESCRIPTIONS-2
Q701 : M30622MGP-293FPU0
Pin No. Pin name
SPRLSB
51
SPRLCS
52
SPRLF/SPRLS
53
DIGSDO
54
DIGSDI
55
DIGCLK
56
DSPBUSY
57
XMREQ1
58
XMREQ2
59
VPOWER
60
APOWER
61
VCC2
62
SEC1H
63
VSS
64
VOLH
65
THERMAL
66
PROTECT
67
FSWSTB
68
FSWCLK
69
FSWDAT
70
NU
71
NU
72
SYSIN
73
XMRST
74
NU
75
SYSOUT
76
NU
77
NU
78
LEDSTBY
79
NU
80
HPDET
81
NU
82
VOLB
83
VOLA
84
INIT3
85
INIT2
86
INIT1
87
BAND
88
KEYINT3
89
KEYINT2
90
KEYINT1
91
KEYINT0
92
KEY3
93
KEY2
94
KEY1
95
AVSS
96

KEY0

97
VREF
98
AVCC
99
NU
100
I/O Act. Description
O H Surround back speaker relay control output.
O H Center/Surround speaker relay control output.
O H Front speaker relay control output.
O H Serial communication signal output to DIR/CODEC/DSP.
I H
Serial communication signal input from DIR/CODEC/DSP.
O CLK Serial communication clock output to DIR/CODEC/DSP.
I H Busy detection signal input from DSP.
O L
Chip request output to XM microprocessor.
I H Chip request input from XM microprocessor.
O H Mute control output to video circuit power supply.
O H Mute control output to audio circuit power supply.
--- --- Power supply.
O H
Control output to power amplifier power supply.
--- --- Ground.
I A/D Speaker output level detection input.
I A/D
Thermal sensor detection input.
I H Over current detection input for speaker protect.
O H Strobe output to function switch.
O H Serial clock output to function switch.
O H Serial data output to function switch.
--- ---
Not used.
--- --- Not used.
I H System control (RI) signal input.
O L
Reset signal output to XM microprocessor.
--- --- Not used.
O L System control (RI) signal output.
--- --- Not used.
--- --- Not used.
O L Standby LED control output.
--- --- Not used.
I H Phones detection signal input.
--- ---
Not used.
I H Data input from rotary encoder (master volume).
I H Data input from rotary encoder (master volume).
I A/D
Initial setting-3.
I A/D Initial setting-2.
I A/D Initial setting-1.
I A/D Tuner band setting.
I L Key input-3 (interrupt).
I L
Key input-2 (interrupt).
I L Key input-1 (interrupt).
I L Key input-0 (interrupt).
I A/D
Key input-3.
I A/D Key input-2.
I A/D Key input-1.
--- --- Ground.
I A/D Key input-0
--- ---
A/D reference voltage power supply.
--- --- A/D Power supply.
-- --- Not used.
TX-SR573