1 of 2 September 2, 2009
2009 Integrated Device Technology, Inc.
IDT and the IDT logo are registered trademarks of Integrated Device Technology, Inc.
Device Overview
The IDT Tsi148 device is the next-generation component in our industry
leading, high performance VMEbus system interconnect product family.
The Tsi148 is fully compliant with the 2eSST and VME64 Extension
standards. This enables you to take advantage of the higher perfor-
mance VME protocols, while preserving your existing investment in VME
boards that implement legacy protocols.
The Tsi148 increases a system’s usable bus bandwidth because its local
bus interface is designed for the next generation PCI/X processors and
peripherals that support either a 66 MHz PCI bus or a 133 MHz PCI-X
bus interface.
Tsi148 eases design constraints of VME Single Board Computers
(SBCs) by requiring less board real estate and power than the previous
generation of VME-to-PCI/X bridge components. These capabilities
make Tsi148 a key building block of the VME Renaissance and of next
generation VME single board computers.
Block Diagram
IEEE1149.1 Boundry Scan
Interrupter, Interrupt Handler
DMA
Linkage
Module
JTAG
PCI-X Master
PCI-X Target
Posted Writes, Split Reads,
Prefetched Reads
VMEbus
System
Controller
VME Master
VME Slave
Posted Writes, Prefetched Reads
80A3020_BK001_03
Interrupts
VMEbus Interface
PCI/X Bus Interface
33-to-66 MHz PCI Bus
50-to-133 MHz PCI-X Bus
64-bit Address / 64-bit Data PCI-X Bus
Arbiter, Clocks,
Daisy Chain Drivers,
Global Bus Timer
64-bit Address / 64-bit Data VMEbus
Supports: SCT, BLT, MBLT,
2eVME, 2eSST
Features
VMEbus Interface
• Standards supported:
– Legacy protocols to protect existing VME investment
– VME64 Extensions
– 2eVME and 2eSST protocols to bring support for higher band-
width
• Full VMEbus system controller functionality
• Interrupt and interrupt handling capability
• Flexible register set; programmable from both the PCI/X bus and
VMEbus
PCI/X Interface
• Fully compliant, programmable PCI or PCI-X bus interface
• 64-bit data path
• Multiple modes of bus operation
– PCI-X operates from 50 to 133 MHz
– PCI bus operates from 33 to 66 MHz
• 32-bit or 64-bit addressing and data in PCI and PCI-X modes
Other Features
• Two, programmable DMA controllers with Direct mode and
Linked-List mode support
• IEEE 1149.1 Interface
• 456 PBGA package, 1.0 mm ball pitch, 27 mm x 27mm size
Benefits
• Increased bandwidth
– 4x increase in usable system bus bandwidth over current solu-
tions
• Less power required than existing devices due to reduced
voltages
– 3.3V I/O supply
– 1.8V Core supply
• Small device footprint
– 40% less board space required than existing products
• Reliable customer support with experience supporting the VME
community for the past decade.
Tsi148
™
PCI/X-to-VMEbus Bridge
Product Brief
