PCI/cPCI-VME Interface

PCI/cPCI-VME link/interface (SIS1100/3100)

The SIS1100/SIS3100 PCI/cPCI to VME interface card combination was developed to meet the requirements of demanding VME data acquisition systems. The link is optimized for low latency high speed readout. Interaction with external logic is possible through optional input/output connectors on the VME side (SIS3100) of the link. The actual VME transactions are handled by a sequencer. The sequencer can execute VME cycles under PC program control or under control of the optional Digital Signal Processor (DSP).

The flexible FPGA based design allows for the implementation of the traditional VME cycles as well as more recent extensions to the standard, like 2eVME e.g.

Picture of SIS1100/3100 with DSP, SDRAM and front panel I/O option

SIS1100/SIS3100 system setup

Properties of VME side:

(Base configuration)

Single width 6U VME master/system controller

VME sequencer

Mapping table with 64 entries

VME master A16/A24/A32/A40 D8/D16/D32/BLT32/MBLT64/2eVME

VME slave A32/D32/BLT32/MBLT64

Block transfer address auto increment on/off (for FIFO reads)

System controller function (can be disabled by jumper)

up to 450 m link distance (up to 20 km with long distance option)

EMC front panel

in field JTAG firmware upgrade capability

LED's
A (access/slave)	M (master)
P (power)	S (sequencer)
R (ready)	L (link up)
LU (link data up)	LD (link data down)
U (user)	DU (dsp user)

Environment	Performance
LINUX	BLT32	25 MBytes/s
	MBLT64	50 MBytes/s
	2eVME	*>80 MBytes/s()**
	Readout from SDRAM	80 MBytes/s
	DSP VME single cycle	600 ns/cycle
	measured with CI80 memory as VME slave
	*() measured with SIS3300 FADC as VME slave**
Win2K/NI CVI	D32	5 µs/longword
	mapped D32 read access	3 µs/longword
	pipelined D32 write access	700ns/longword
	MBLT64 read	40 MBytes/s

2eVME transfer scope shot

upper trace: DS1, lower trace: DTACK

Options

SIS9200 DSP piggy pack as histogrammer

64/128/256/512 MB slave/histogramming memory

Front panel I/O option

4 flat cable inputs/4 flat cable outputs (ECL or high impedance TTL)

3 LEMO inputs/3 LEMO outputs (50 Ohm TTL or NIM level)

LEMO reset output (50 Ohm TTL or NIM level)

Block diagram of VME side:

Properties of PCI/cPCI side:

The PCI (SIS1100) side consists of two printed circuit boards. The first board is a CMC carrier board (SIS1100-CMC or SIS1100-cCMC) with a PLX 9054 PCI master bridge chip a FPGA and glue logic, like boot circuitry, the second card is the CMC optical link mezaninne card (SIS1100-OPT).