Sundance SMT329 - Manual (Page 6)

1 Introduction
The Smt329 is a VME four-site module carrier developed to provide access to TIM Modules
over the VME64 (parallel) and VXS (serial) busses. It is backward compatible with the
SMT328, and can replace the SMT328 with no software modifications. By implementing the
VME64 2eSST standard it offers up to 320M bytes/sec (2.56G bits/sec) across the VME bus,
while 8 VXS ports offer up to 2.5G bits/sec each, making a VXS total of up to 20G bits/sec.
The SMT329 has 8M bytes of high speed static ram arranged as 1M by 64 bits, with a read or
write speed of at least 1G bytes/sec throughput for 64 bit transfers.
Buffered front panel JTAG ports allow control and debug of all 4 TIM modules
simultaneously, and multiple SMT329s.
All communications apart from JTAG and comms ports are controlled by a single Virtex 4
FPGA.
The 6 comms ports on each TIM (3 reset to out and 3 reset to in), and 2 comms ports on the
Virtex 4 (2 reset to out), are connected to a crossbar switch which allows a static
configuration to specify which of the 14 reset to out ports is connected to each of the 12 reset
to in ports. The switch is implemented in a Xilinx Spartan 3 FPGA. The switch topology is
stored in NVRAM and copied to the switch at board reset by the Virtex4.
The 2 RSL ports on each TIM are connected to Virtex4 Rocketio ports.
Four 1 Gigabit Ethernet ports are available on the VME P2 connector.
Two TIM sites have global bus interfaces to the Virtex4 for access to the static ram and VME
bus.
For use in legacy VME racks, SMT329 can be assembled with no P0 connector, and an on
board 3.3V PSU. It does not guarantee to support 2eVME or 2eSST and does not support
VXS, but it does retain the four Gigabit Ethernet ports on the P2 connector.
User Manual SMT329 Page 6 of 52 Last Edited: 09/02/2007 10:58:00