DE5-Net User Manual
June 20, 2018
18
HEX1
HEX1_DP
1.5-V
PIN_E9
HEX0
HEX0_D0
1.5-V
PIN_G8
HEX0
HEX0_D1
1.5-V
PIN_H8
HEX0
HEX0_D2
1.5-V
PIN_J9
HEX0
HEX0_D3
1.5-V
PIN_K10
HEX0
HEX0_D4
1.5-V
PIN_K8
HEX0
HEX0_D5
1.5-V
PIN_K9
HEX0
HEX0_D6
1.5-V
PIN_N8
HEX0
HEX0_DP
1.5-V
PIN_P8
2
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The FPGA board is equipped with a temperature sensor, MAX1619, which provides temperature
sensing and over-temperature alert. These functions are accomplished by connecting the
temperature sensor to the internal temperature sensing diode of the Stratix V GX device. The
temperature status and alarm threshold registers of the temperature sensor can be programmed by a
two-wire SMBus, which is connected to the Stratix V GX FPGA. In addition, the 7-bit POR slave
address for this sensor is set to ‘0011000b’.
An optional 3-pin +12V fan located on J15 of the FPGA board is intended to reduce the temperature
of the FPGA. Users can control the fan to turn on/off depending on the measured system
temperature. The FAN is turned on when the FAN_CTRL pin is driven to a high logic level.
The pin assignments for the associated interface are listed in
Table 2-7
Temperature Sensor Pin Assignments, Schematic Signal Names, and Functions
Schematic
Signal Name
Description
I/O Standard
Stratix V GX Pin
Number
TEMPDIODEp
Positive pin of temperature diode in
Stratix V
1.8-V
PIN_P6
TEMPDIODEn
Negative pin of temperature diode in
Stratix V
1.8-V
PIN_P7
TEMP_CLK
SMBus clock
2.5-V
PIN_D21
TEMP_DATAT
SMBus data
2.5-V
PIN_D20
TEMP_OVERT_n
SMBus alert (interrupt)
2.5-V
PIN_C22
TEMP_INT_n
SMBus alert (interrupt)
2.5-V
PIN_C21
FAN_CTRL
Fan control
2.5-V
PIN_AR32
