5. Configuration Registers
86
Tsi310 User Manual
80B6020_MA001_05
5.4.15
Subordinate Bus Number Register
The subordinate bus number register records the bus number of the highest numbered PCI bus
segment which is behind (or subordinate to) the bridge. The configuration software programs
the value in this register. The bridge uses this register in conjunction with the secondary bus
number register to determine when to respond to a Type 1 configuration transaction on the
primary interface and pass it to the secondary interface. The bridge also uses the secondary bus
number register and the subordinate bus number register to determine when to forward Type 1
configuration transactions upstream.
Address Offset
x‘1A’
Access
Read/Write
Reset Value
x‘00’
Subordinate Bus Number
7
6
5
4
3
2
1
0
Bit(s)
Access
Field Name and Description
7:0
RW
Software sets this register to the bus number of the highest numbered bus segment behind (or
subordinate to) the bridge.
Summary of Contents for Tsi310TM
Page 8: ...Contents 8 Tsi310 User Manual 80B6020_MA001_05...
Page 10: ...List of Figures 10 Tsi310 User Manual 80B6020_MA001_05...
Page 12: ...List of Tables 12 Tsi310 User Manual 80B6020_MA001_05...
Page 18: ...18 Tsi310 User Manual 80B6020_MA001_05...
Page 44: ...2 Bus Operation 44 Tsi310 User Manual 80B6020_MA001_05...
Page 58: ...3 Clocking and Reset Options 58 Tsi310 User Manual 80B6020_MA001_05...
Page 62: ...4 Transaction Ordering 62 Tsi310 User Manual 80B6020_MA001_05...
Page 150: ...5 Configuration Registers 150 Tsi310 User Manual 80B6020_MA001_05...
Page 170: ...6 Signals and Pinout 170 Tsi310 User Manual 80B6020_MA001_05...
Page 190: ...7 JTAG Boundary Scan 190 Tsi310 User Manual 80B6020_MA001_05...
Page 196: ...8 Electrical Characteristics 196 Tsi310 User Manual 80B6020_MA001_05...
Page 200: ...9 Package Information 200 Tsi310 User Manual 80B6020_MA001_05...
Page 202: ...A Ordering Information 202 Tsi310 User Manual 80B6020_MA001_05...
Page 206: ...Index 206 Tsi310 User Manual 80B6020_MA001_05...