Yamaha MCX-1000 Service Manual page 38

MCX-1000
IC222 : HD64480F (MAIN P.C.B.)
Bus Bridge LSI
Pin No. Signal Name
114 Vcc
115 ID1_INTR
116 ID0_/DMAK
117 ID1_/DMAK
118 ID0_/CS0
119 ID0_/CS1
120 ID0_DMRQ
121 Vss
122 ID1_DMRQ
123 ID_IORDY
124 ID_/DIOR
125 ID_/DIOW
126 Vcc
127 ID1_/CS0
128 ID1_/CS1
129 Vss
130 Vss
131 T
132 W
133 Vdd
134 Reserved
135 Reserved
136 Reserved
137 Reserved
138 Reserved
139 Reserved
140 Reserved
141 Vss
142 Reserved
143 Vdd
144 EX_/WAIT1
145 EX_/WAIT0
146 EX_/IRQ0
147 EX_/IRQ1
148 SH_/IRL0
149 SH_/IRL1
150 SH_/IRL2
151 SH_/IRL3
152 SH_/WAIT
153 SH_/RST
154 SH_/RD
155 SH_/RDWR
156 SH_/WE0
157 SH_/WE1
158 SH_/BS
159 Vss
160 SH_CKIO
161 Vdd
162 SH_/CS
38
I/O Active Function
+5V POWER SUPPLY (FOR ATA-3 INTERFACE)
I H ATA interface 1 interrupted request
O L ATA interface 0 DMA acknowledge
O L ATA interface 1 DMA acknowledge
O L ATA interface 0 chip select
O L ATA interface 0 chip select
I H ATA interface 0 DMA request
GND
I H ATA interface 1 DMA request
I H ATA interface IORDY
O L ATA interface IOR
O L ATA interface IOW
+5V POWER SUPPLY (FOR ATA-3 INTERFACE)
O L ATA interface 1 chip select
O L ATA interface 1 chip select
GND
GND
Test (Connect to VSS)
Test (Connect to VSS)
+3.3V power supply
Connect to GND
Connect to GND
Connect to GND
Connect to GND
NC
NC
NC
GND
Connect to GND
+3.3V power supply
I L External wait input
I L External wait input
I L External interrupt input
I L External interrupt input
O L SH interface External interrupt 0
O L SH interface External interrupt 1
O L SH interface External interrupt 2
O L SH interface External interrupt 3
O L SH interface wait
I L SH interface reset
I L SH interface read strobe
I H SH interface read/write
I L SH interface write enable 0
I L SH interface write enable 1
I L SH interface bus start
GND
I H SH interface system clock
+3.3V power supply
I L SH interface chip select
Buffer form
S-TTL
TTL
TTL
TTL
TTL
S-TTL
S-TTL
S-TTL
TTL
TTL
TTL
TTL
LV-TTL(P-up)
LV-TTL(P-up)
LVS-TTL(P-up)
LVS-TTL(P-up)
LV-TTL
LV-TTL
LV-TTL
LV-TTL
LV-TTL
LVS-TTL
LV-TTL
LV-TTL
LV-TTL
LV-TTL
LV-TTL
LV-CMOS
LV-TTL