3. Clocking and Reset Options
56
Tsi310 User Manual
80B6020_MA001_05
This 64-bit base address register and the memory space defined by it are enabled by the
strapping pin, BAR_EN. When BAR_EN is pulled low, this register location returns zeros for
reads and cannot be written. When BAR_EN is pulled high, the upper memory base address
register and lower memory base address registers combined specify address bits 63:20 of a
memory region. Memory accesses on the primary bus are compared against this register, if
address bits 63:20 are equal to bits 63:20 of the address defined by the combination of the lower
memory base address register and the upper memory base address register, the access is claimed
by the Tsi310 and passed through to the secondary bus. Memory accesses on the secondary bus
are also compared against this register, if address bits 63:20 are equal to bits 63:20 of the
address defined by the combination of the lower memory base address register and the upper
memory base address register, the access is ignored by the Tsi310.
3.12
Optional Configuration Register Access from the
Secondary Bus
On the secondary bus, the Tsi310 responds to a Type 0 configuration transaction by accepting
the transaction when the following conditions are met during the address phase:
•
S_C/BE(3:0)# command indicates a configuration read or configuration write transaction
•
S_AD(1:0) are b‘00’
•
S_IDSEL is asserted
•
The Bus Master control bit in the Command register must be set to b‘1’ from the Primary
Interface
Applications that do not require access to the bridge configuration registers from the secondary
bus should pull the S_IDSEL pin low.
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...