Artesyn ARTM-831X Installation and Use (June 2014) - Manual (Page 85)

Functional Description
ARTM-831X Installation and Use (6806800M76E) 85
4.4.2 TSI-Extender FPGA
The TSI- Extender FPGA device acts as a companion device for the TSI- FPGA. It is mainly used
as a pin- extender for the TSI-FPGA, to reduce its size and thus optimize board space utilization
and cost.
 Controlled via SPI from the TSI FPGA
 Collects the recovered receive clocks from the E3/DS3 LIU devices
 Pre-selector for any 2 receive clocks as reference clock input to the system synchronizer on
the front board.
 Collects status & alarm signals from:
– E3/DS3 LIU
 Update/failback SPI configuration Flash in working/golden mode
4.4.2.1 SPI Interface
The TSI-Extender FPGA has two SPI interfaces in total. The first one is the link to the TSI-FPGA.
It provides transparent access and control of the I/O expansion. The second one is used for
configuration and connects to a SPI Flash device.