Yamaha YSP-900 Service Manual page 43

IC24 : M30626FJPFP (DSP P.C.B)
16-bit Microprocessor
Pin No. Port Definition I/O
1 PO96 Data output to FL driver
FL_TXD O
2 PO95 FL_CLK O Clock output to FL driver
3 PO94 Pull down
I
4 PO93 I Pull down
5 PO92 Serial data output
SDM O
6 PI91 SDD I Serial data input
7 PO90
SCK O Clock output of serial port
8 BYTE I GND
9 CNVSS
CNVSS I Pull down (Normal mode), Pull up (Internal flash Rom writing mode)
10 PO87 /CSY O Chip select signal to EVE
11 PO86
/ICY O Reset singnal to EVE
12 /RESET /RES I System reset input
XOUT
13 XO O 16MHz frequency clock output
14 VSS VSS GND
XIN
15 XI I 16MHz frequency clock input
16 VCC VCC +3.3V
17 PI85 I Pull up
18 PI84 /INTTIA I Interrupt input from front-end DSP
19 PI83 /INTDIR I Interrupt input from DIR
20 PI82 M_RXDO I Interrupt input from RS-232C
21 PI81 I Pull down
22 PO80 O Terminated
23 PI77 TIA_MUTE O MUTE signal to front-end DSP
24 PO76 FL40KHz O 105kHz signal for FL filament
25 PO75 I BUSY signal from front-end DSP
/TIA_BUSY
26 PO74 /TIA_RDY I READY signal from front-end DSP
27 PO73 READY signal from back-end DSP
I2C_RDY I
28 PO72 I2C_MUTE O MUTE signal to back-end DSP
29 PI71 I2C CLOCK signal to back-end DSP
I2C_SCL O
30 PO70 I2C_SDA O I2C DATA signal to back-end DSP
RS-232C data output for µ-com flash writing
31 PO67
M_TXDO O
RS-232C data input for µ-com flash writing
32 PI66 M_RXDO I
RS-232C clock output for µ-com flash writing
33 PO65
M_CLKO O
RS-232C BUSY output for µ-com flash writing
34 PO64 M_RTS O
35 PO63
M_TXDO O Data output to RS-232C
36 PI62 M_RXDO I Data input from RS-232C
37 PO61
O Terminated
38 PO60 M_CTS O CTS output to RS-232C
PO57
39 O Terminated
40 PI56 O Terminated
PI55
41 I Pull down
42 PO54 /CSDIR O Chip select signal to DIR
43 PO53 /CSTIA O Chip select signal to front-end DSP
44 PO52 /ICDIR O RESET signal to DIR
45 PO51 /ICTIA O RESET signal to front-end DSP
46 PI50 I Pull up
47 PO47 O Terminated
48 PO46 O Terminated
49 PO45 PW_RY O Power relay control signal
50 PO44 FL_ON O RESET signal to FL driver
51 PO43 O Chip select signal to EEPROM
52 PI42 O Data signal to EEPROM
53 PO41 I Data signal from EEPROM
Function
IC24 : M30626FJPFP (DSP P.C.B)
16-bit Microprocessor
Pin No. Name Definition I/O
O Clock signal to EEPROM
54 PO40
55 PO37 O Terminated
O Terminated
56 PO36
57 PI35 /DA1_MUTE O MUTE signal to DAC for Subwoofer
MUTE signal to DAC for Woofer
58 PO34 /DA2_MUTE O
59 PO33 O Terminated
MUTE signal to D3 digital AMP
60 PI32 D3_MUTEN O
61 PO31 D3_PROTN I Protection detection signal from D3 digital AMP
+3.3V
62 VCC
63 PO30 /SW_MUTE O MUTE signal of Subwoofer
64 VSS GND
65 PO27 OSD_TX O Data output to OSD driver
66 PO26 OSD_CE O Chip select output to OSD driver
67 PO25 OSD_CLK O Clock output to OSD driver
68 PO24 D4_MODE O Power down signal to D4 digital AMP
69 PO23 /MIC_DET3 I MIC detection signal
70 PO22 IN_SEL1 O Input select signal 1
71 PO21 SW_DET I No use
72 PO20 O Terminated
73 -INT5 PW_DOEWN I Power down detection signal
74 -INT4 STBY_SW I Standby switch input
75 -INT3 REMOTE I Remote control signal input
76 PO14 /WF_MUTE O Woofer MUTE signal
77 PO13 EVE_MUTE O EVE MUTE signal
78 PO12 IN_SEL0 O Input select signal 0
79 PO11 NRESET O RESET signal to back-end DSP
80 PO10 O Terminated
81 PO07 O Terminated
82 PO06 O Terminated
83 PO05 O Terminated
84 PI04 O Terminated
85 PI03 O Terminated
86 PO02 O Terminated
87 PO01 O Terminated
88 PO00 O Terminated
89 A/D7 DEST I Selection of destination input
90 A/D6 VOL_DET I Voltage of power supply detection input
91 A/D5 +3.3_DET I +3.3V detection (Pull down)
92 A/D4 I Pull down
93 A/D3 TEMP I Pull up
94 A/D2 KEY0 I Key input 0
95 A/D1 KEY1 I Key input 1
96 AVSS GND
97 A/D0 I Pull down
98 VREF I +3.3V
99 AVCC I +3.3V
100 PO97 FL_CE Chip select signal to FL driver
Key Input (A-D) Pull-Up Resistance 10 k-ohms
Ohm 0 k + 1.2k
V ~ 0.30 ~ 0.70
ADKEY 0 VOLUME
INPUT
94pin A/D2 +
ADKEY 1 VOLUME
–
95pin A/D1 -
YSP-900
Function
43