Yamaha RX-V557 Service Manual page 50

RX-V557/HTR-5850/DSP-AX557
RX-V457/HTR-5840/DSP-AX457
IC451: M30626FHPFP (SUBTRANS P.C.B.)
16bit µ-COM (Main CPU)
PSV
PURD
/BLK
ISA
ISB
ONEA
ONEB
VRA
VRB
PRV
PRD
PLDET
THM
ADKEY0
ADKEY1
AVss
MODEL
VREF
AVcc
CEFD
No. Port Name Terminal Name
1 P96/ANEX1/SOUT4 DTFD
2 P95/ANEX0/CLK4 CKFD
3 P94/DA1/TB4in LIMIT
4 P93/DA0/TB3in TRIG
5 P92/TB2in/SOUT3 SDM
6 P91/TB1in/SIN3 SDD
7 P90/TB0in/CLK3 SCK
8 BYTE BYTE
9 CNVss CNVss
10 P87/Xcin MUTETI
11 P86/Xcout TIBUSY
12 /RESET /RESET
13 Xout Xout
14 Vss Vss
15 Xin Xin
16 Vcc1 Vcc
17 P85/NMI NMI
18 P84/INT2 /INTTI
19 P83/INT1 /INTDIR
20 P82/INT0 N.C.
21 P81/TA4in/U /CSDIR
22 P80/TA4out/U /CSTI
23 P77/TA3in /CSDAC
24 P76/TA3out /ICDIR
25 P75/TA2in/W /ICTI
26 P74/TA2out/W SPIRDY
27 P73/CTS2/RTS2/TA1in/V /CEEEP
28 P72/CLK2/TA1out/V CKZ2
29 P71/RXD2/SCL2/TA0i n /TB5i n DRXM
30 P70/TXD2/SDA2/TA0out DTXM
DTEV
31 P67/TXD1/SDA1
TXDF
50
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
I/O
PowerOn Pure Direct Standby
SO O
SO O
DA O
O O
SO O
SI O
SO O
MCU MCU
MCU MCU
O O
I O
MCU MCU
MCU MCU
MCU MCU
MCU MCU
MCU MCU
MCU MCU
IRQ O
IRQ O
O O
O O
O O
O O
O O
O O
O O
I O
O O
SI O
SO O
SO O
SO
50 VIA
49
DTZ2
48
DKZ2
47
/CE
46
45 /MTFS
44 /MTZ2
43 /MTSW
42 /MTCT
41 /EMP
/MTHP
40
/HP
39
38
SCKN
37
36 SDRN/DEST
35 SDTN
34 BSY
33 CLKF
32 RXDF
TXDF
31
Sleep
O FL Driver TxD
O FL Driver CLOCK
O Limiter control output
O DC TRIGGER output
O Serial data output to DIR, TI (DA601) / DIR : 4M, LSBF/TI : 1M, MSBF
O Serial data input from DIR, TI (DA601)
O Serial data clock output to DIR, TI (DA601), DAC
MCU Vss : When single chip mode is used
MCU Vss : When single chip mode is used, Vcc : When flash writing is used
O Muting (HI=MUTE) of TI decoder DSP DA601
O TI BUSY detection / CDDA write data input
MCU Reset
MCU Oscillation output (oscillation stopped in Sleep mode)
MCU Ground for micro-processor
MCU Oscillation input
MCU Power supply +5V for micro-processor
MCU Unused, connected to Vcc
O Interruption of TI decoder DSP DA601
O Interruption of DIR
O
O DIR chip enable
O TI decoder DSP DA601 chip enable
O DAC (common to 2ch/8ch) chip enable
O DIR reset
O TI decoder DSP DA601 reset
O TI DA601 Serial Ready / CDDA write WCK input
O EEPROM CE
O Zone2 Selector (BD3841) Clock (RX-V557_U, C, A, B, G, E models)
O DABIC IC RxD (U model)
O DABIC IC TxD (U model)
O Electronic volume IC DATA
Data transmission terminal for AF220
Function