TSI148-133IL IDT, Integrated Device Technology Inc, TSI148-133IL Datasheet - Page 196

• Manufacturer Part Number: TSI148-133IL
• Description: IC PCI-VME BRIDGE 456PBGA
• Manufacturer: IDT, Integrated Device Technology Inc
• Series: Tsi148&Trade;r

Specifications of TSI148-133IL

• Applications: PCI-to-VME Bridge
• Interface: PCI
• Voltage - Supply: 3.3V
• Package / Case: 456-PBGA
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: 800-1905

10. Registers > Register Endian Mapping
Table 35: Endian Register Views
196
Register
CR/CSR
Group
GCSR
LCSR
PCFS
When viewed from the PCI/X bus, the LCSR, GCSR and CR/CSR registers appear swapped.
When viewed from the PCI/X bus, the PCFS registers appear as presented in the
programming section.
Table 35
endian mode and that the bridge between the processor bus and PCI/X bus swaps the data.
This table assumes the 32-bit value ABCD is stored in a register and that the data is accessed
using a 32-bit read.
Data transferred between the VMEbus and the PCI/X bus is swapped. When a processor
operating in big endian mode transfers data from the VMEbus, the data is swapped in the
VME bridge and swapped again in the host bridge. The two swaps effectively cancel each
other and processor sees the VMEbus data in the correct order. When a processor operating in
little endian mode is used, the VMEbus data appears swapped.
summarizes the register views. This table assumes the processor is operating in big
Value in
Register
ABCD
ABCD
ABCD
ABCD
PCI/X bus
Value on
ABCD
DCBA
DCBA
DCBA
Tsi148 PCI/X-to-VME Bus Bridge User Manual
Processor bus
Value on
DCBA
ABCD
ABCD
ABCD
80A3020_MA001_13
VMEbus
Value on
DCBA
ABCD
ABCD
ABCD