Yamaha RX-V450, Service Manual

Page: 48 / 125

RX-V550/HTR-5750
RX-V450/HTR-5740/DSP-AX450
48
Pin Pin Function Function
Function
Detail of Function Classified I/O Comment
name
25 P75/TA2in/W P75 /ICADM ADM RESET DSP O
26 P74/TA2out/W P74 VBIT DSP I
27 P73/CTS2/RTS2/TA1in/V P73 /CEEEP EEPROM CE FLASH O Connected to FLASH write terminal
28 P72/CLK2/TA1out/V CLK2 CKEV Electronic volume IC Clock FUNC SCK
29 P71/RXD2/SCL/TA0in/TB5in N.C.
30 P70/TXD2/SDA/TA0out TXD2 DTEV Electronic volume IC DATA FUNC SO Pull-up required externally (for Nch OD
port)
31 P67/TXD1 TXD1 TXDF Flash ROM TxD/Selector IC DATA FLASH/FUNC SO Connected to FLASH write terminal
32 P66/RXD1 RXD1 RXDF Flash ROM RxD FLASH SI Connected to FLASH write terminal
33 P65/CLK1 CLK1 CLKF Flash ROM Clock/Selector IC Clock FLASH/FUNC SCK Connected to FLASH write terminal
34 P64/CTS1/RTS1/CTS0/CLKS1 P64 BSY Flash BUSY signal output FLASH O Connected to FLASH write terminal
35 P63/TXD0 TXD0 SDTN RDS/OSD/S/P conversion IC TxD TUNER/VIDEO SO When /PURD is “L”, fixed to OL
because of target power supply turned
OFF.
36 P62/RXD0 RXD0 SDRN/DEST RDS RxD / FREQSW( Dest R ) TUNER/VIDEO SI/I(IPU) R destination: RDS data received for
model having frequency switch and
RDSAlways at OL except model without
tuner/R destination/RDS destination
(OK with hardware opened)For setting
details, refer to Function Check Table.
37 P61/CLK0 CLK0 SCKN RDS/OSD/S/P conversion IC Clock TUNER/VIDEO SCK When /PURD is “L”, fixed to OL
because of target power supply turned
OFF.
38 P60/CTS0/RTS0 N.C.
39 P57/RDY/CLKout P57 /HP HEAD PHONE detection FUNC I
40 P56/ALE P56 /MTHP HEAD PHONE MUTE output FUNC(internal) O
41 P55/HOLD /EMP For Flash write (LO) GND
42 P54/HLDA P54 /MTCT MUTE Center FUNC (internal) O
43 P53/BCLK P53 /MTSW MUTE SW FUNC (internal) O
44 P52/RD P52 /MTZ2 Zone 2 MUTE/ZONE2 presence check FUNC (internal) O/I
45 P51/WRH/BHE P51 /MTFS MUTE Front/Surround , PreOUT FUNC/MAIN 2 (internal) O
46 P50/WRL/WR /CE For Flash write (HI) I
47 P47/CS3 P47 CKZ2 Zone2 Selector Clock FUNC SCK
48 P46/CS2 P46 DTZ2 Zone2 Selector DATA FUNC SO
49 P45/CS1 N.C.
50 P44/CS0 P44 VIA VIDEO Selector A VIDEO O
51 P43/A19 P43 VIB VIDEO Selector B VIDEO O
52 P42/A18 P42 /VR VIDEO RecOut Selector 1 VIDEO O
53 P41/A17 N.C.
54 P40/A16 P40 YCSEP Y/C separation selection OSD O
55 P37/A15 P37 CMP0 Compornent Selector 0 COMP O
56 P36/A14 P36 CMP1 Compornent Selector 1 COMP O
57 P35/A13 P35 TRIG Trigger control Remote O (RX-V550 only)
58 P34/A12 N.C.
59 P33/A11 P33 RDSE RDS Enable, RDS presence check TUNER (internal) O/I
60 P32/A10 P32 CEP/TUN1 PLL IC Enable / destination check 1 TUNER O/I
61 P31/A9 P31 SDTP PLL IC TxD / TUNER (SE) presence (SE) check TUNER SO
62 Vcc Vcc Vcc Power supply for micropro5V Vcc(BU)
63 P30/A8 P30 SCKP/TUN0 PLL IC Clock/Destination check 0 TUNER O/I
64 Vss Vss Vss Ground for microprocessor Vss
65 P27/A7 P27 SDRP PLL IC RxD TUNER I(IPU) External pull-up not required because of
being pulled up within microprocessor
IC502: M30622MWP-152FP (FUNCTION P.C.B.)
16bit
µ
-COM (Main CPU)
IC502: M30622MWP-152FP (FUNCTION 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
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
50
49
48
47
46
45
44
43
42
41
40
39
38
37
36
35
34
33
32
31
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30
80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51
VIA
DTZ2
DKZ2
/CE
/MTFS
/MTZ2
/MTSW
/MTCT
/EMP
/MTHP
/HP
SCKN
SDRN/DEST
SDTN
BSY
CLKF
RXDF
TXDF
DTFD CKFD
LC1
SDM
SDD SCK
BYTE
CNVss
/CSY
/ICY
RESET
Xout
Vss
Xin
Vcc
NMI
INTDSP INTFCT
VSY
/CSDIR
/CSADM
/CSD
A
C
/ICD
/ICADM
VBIT
/CEEEP
CKEY CEEV DTEV
PRI 8/4DET /4ohm Z2R
Y
MAR
Y
REM PSW PDET MBR
Y
ER
Y
SBR
Y
PR
Y
/ST TUNED TMT SDRP Vss SCKP/TUN0 Vcc SDTP CEP/TUN1 RDSE CES TRIG CMP1 CMP0 YCSEP I/E /VR VIB
Pin Pin Function Function
Function
Detail of Function Classified I/O Comment
name
1 P96/ANEX1/SOUT4 SOUT4 DTFD FL Driver TxD OPE SO
2 P95/ANEX0/CLK4 CLK4 CKFD FL Driver CLOCK OPE SCK
3 P94/DA1/TB4in DA1 LC1 Power limiter control Main_1 DA
4 P93/DA0/TB3in N.C.
5 P92/TB2in/SOUT3 SOUT3 SDM YSS TxD DSP SO
6 P91/TB1in/SIN3 SIN3 SDD YSS RxD DSP SI
7 P90/TB0in/CLK3 CLK3 SCK YSS CLOCK DSP SCK
8 BYTE BYTE BYTE When in single chip mode: Vss Vss Connected to FLASH write terminal
9 CNVss CNVss CNVss When in single chip mode: Vss, Vss/Vcc Connected to FLASH write terminal
When FLASH writing: Vcc (for rewriting EEPROM)
10 P87/Xcin P87 /CSY YSS CE DSP O
11 P86/Xcout P86 /ICY YSS RESET DSP O
12 RESET RESET RESET Reset I
13 Xout Xout Xout Oscillation output
14 Vss Vss Vss Ground for microprocessor Vss
15 Xin Xin Xin Oscillation input 16MHz
16 Vcc Vcc Vcc Power supply for micropro5V Vcc(BU)
17 P85/NMI NMI NMI Unused, connected to Vcc Vcc(BU)
18 P84/INT2 INT2 INTDSP DSP INT
19 P83/INT1 INT1 INTFCT DSP INT
20 P82/INT0 N.C.
21 P81/TA4in/U P81 /CSDIR DIR CS DSP O
22 P80/TA4out/U P80 /CSADM ADM CS DSP O
23 P77/TA3in P77 /CSDAC DAC CS DSP O
24 P76/TA3out P76 /ICD DIR RESET DSP O