Sundance SMT390-VP - Manual (Page 23)

Version 2.4 Page 23 of 55 SMT390-VP User Manual
Green LEDs
There is a total of 7 LEDs on the Daughter Module. Three are dedicated for the
power supplies (3.3Volt, 3.3V ADC Channel A and ADC Channel B). Four are driven
by the FPGA - they are noted on the PCB 1, 2, 3 and 4. LED1 reflects the state of
External Trigger A (J7) and LED2 the state of the External Trigger Channel B (J10).
LEDs 3 and 4 are for internal debug purpose.
ADC Data Interface
The output of each ADC is a 12-bit LVDS data bus with an LVDS clock. This clock
and data bus is connected straight to high-speed LVDS transceivers on the Xilinx
Virtex II Pro FPGA.
Clock synthesizer Interface
A three wire unidirectional control interface is implemented between the FPGA and
the on-board clock synthesizer (SY89429 - Micrel). The clock synthesizer is
configurated via two variables M and N.
Fsynthesizer = 2xM / N’
Where 200 < M < 475
And N’ = 2 when N=0, 4 when N=1, 8 when N=2 and 16 when N=3.
For example: to have an on-board clock of 210 MHz, set M to 420 (decimal) and N to
4 (decimal).
Clock Routing
The clock routing for both ADC channels is symmetrical. A difference of less than
100ps has been measured.
TIM Interface
The SMT390-VP implements ComPorts 0 and 3. There are no DIP switches on the
module and all configuration data is received and transmitted over these two ports.
None of the ComPorts is used for ADC data transfer. ComPort 3 is implemented as a
bi-directional interface for FPGA configuration and control operations. ComPort 0 is
available but not used in the default Firmware provided with the board.
RSL Interface (RSL are not available)
RSL Connector and Pinout Definition
The Rocket Serial Link (RSL) is a serial based communications interconnection
standard that is capable of transfer speeds of up to 2.5GBit/s per link. Up to four links
can be combined to form a Rocket Serial Link Communications Channel (RSLCC)
that is capable of data transfer up to 10GBit/s.
Each RSL is made up of a differential Tx and Rx pair. A single RSL can thus transfer
data at 2.5GBit/s in both directions at the same time. Rocket Serial Link