Dini Group DN9002K10PCI, Руководство пользователя

Страница: 105 / 169

H A R D W A R E
13 Temperature sensors.
Each FPGA is connected to a temperature monitor. This monitor can internally measure the
temperature of the FPGA silicon die. The maximum recommended operating temperature of
the FPGA is 85 degrees. The accuracy of the temperature sensor is about +0 to +5 degrees.
When the configuration circuitry measures the temperature of any FPGA rise above 80 degrees,
it will immediately un-configure the hot FPGA, and prevent it from re-configuring. When the
temperature drops below 80, the configuration circuitry will again allow the FPGA to configure.
When this occurs a message will appear on the CONFIG RS232 port (P3). An example test
output is given below.
**********************************************************************
TEMPERATURE ALERT: FPGA A
CURRENT TEMPERATURE: 81 DEGREES C
THRESHOLD TEMPERATURE: 80 DEGREES C
THE FPGA IS BEING CLEARED IN AN ATTEMPT TO PREVENT HEAT DAMAGE.
SOFTWARE WILL PREVENT RECONFIGURATION UNTIL THE TEMPERATURE
DROPS A FULL DEGREE BELOW THE THRESHOLD TEMPERATURE.
**********************************************************************
**********************************************************************
TEMPERATURE ALERT: FPGA A
CURRENT TEMPERATURE: 79 DEGREES C
THRESHOLD TEMPERATURE: 80 DEGREES C
THE FPGA HAS DROPPED BELOW THE ALARM THRESHOLD
AND MAY NOW BE RECONFIGURED.
**********************************************************************
The FPGA can safely operate as hot as 120 degrees, but timing is not guaranteed. You can use
the temperature setting in the ISE place and route tool to make timing allowances for operating
the FPGA out-of-range. If you want to disable the temperature limit on the DN9002K10PCI,
you can do that using a menu option in the configuration RS232 interface.
14 Encryption Battery
The Virtex5 FPGA supports bit stream encryption. When using encryption, the FPGA must
decode the bitstream using a secret key that is stored in a persistent memory in the FPGA.
When the DN9002K10PCI is powered off, a voltage is supplied to the FPGA by a battery
installed in socket X2.
X2 is designed to house a CR1220-type lithium coin-cell battery. Typically, these batteries
produce 3.0V. The socket may also work with battery types DB-T13, L04, PA. These however,
have not been tested. Insert the battery positive side up.
DN9002K10PCI User Guide www.dinigroup.com 95