SIS Documentation
SIS3800
Scaler/Counter
Page 5 of 39
2 Introduction
The SIS3800 is one of the classic VME counter/scaler implementations on the base of the
SIS360x/38xx printed circuit board. The unit has 32 counter channels and a maximum
counting frequency of 200 MHz (ECL and NIM) 100 MHz (TTL) respective. As all boards of
the family it is of single slot double Eurocard form factor and available with flat cable
connectors for ECL and TLL levels and LEMO connectors for NIM and TTL levels.
The SIS360x/38xx card is a flexible concept to implement a variety of latch and counter
firmware designs. The flexibility is based on two to six Xilinx FPGAs in conjunction with a
FLASHPROM from which the firmware files are loaded into the FPGAs. Depending on the
stuffing options of the printed circuit board, the user has the possibility to cover several
purposes with the same card, hence the manual is a combination of firmware and hardware
description .
All cards of the family are equipped with the 5 row VME64x VME connectors, a side cover
and EMC front panel, as well as the VIPA LED set. For users with VME64xP subracks VIPA
extractor handles can be installed. The base board is prepared for VIPA style addressing, the
current first version of the SIS3800 firmware does not feature VIPA modes yet however.
As we are aware, that no manual is perfect, we appreciate your feedback and will try to
incorporate proposed changes and corrections as quickly as possible. The most recent version
of this manual can be obtained by email from
, the revision dates are online
under http://www.struck.de/manuals.htm. A list of available firmware designs can be
retrieved from http://www.struck.de/sis3638firm.htm
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