Altera Transceiver Signal Integrity Development Kit, Stratix IV GX Edition - Manual (Page 31)

Chapter 2: Board Components 2–21
Components and Interfaces
November 2011 Altera Corporation Transceiver Signal Integrity Development Kit,
Stratix IV GX Edition Reference Manual
Temperature monitoring for the Stratix IV die is achieved by using a MAX1619
temperature sense device. The MAX1619 connects to the FPGA by a 2-wire SMBus
interface. The OVERTEMPn and ALERTn signals from the MAX1619 connect to the FPGA
to allow it to immediately sense a temperature fault condition and turn on the
attached fan. The FPGA controls the fan based on the OVERTEMPn signal from the
MAX1619, or it can be set to ON always.
Table 2–19 lists the fan control jumper (J64)
which is used to configure the fan.
An over-temperature orange warning LED (D6) also connects to the FPGA to indicate
that an over-temperature condition exists and that a fan should be attached and
running.
Table 2–20 lists the temperature sense device pin-out.
Table 2–21 lists the temperature sensor component reference and manufacturing
information.
Table 2–19. Fan Jumper (J64)
Board Reference Jumper Name Description
J64 FAN
When jumper is installed on pins 1-2, the fan is auto-controlled by the FPGA.
When jumper is installed on pins 2-3, the fan is always on.
Table 2–20. Temperature Sensor Pin-Out
Board
Reference
Description
Schematic Signal
Name
I/O Standard
Stratix IV GX
Device Pin
Number
Other Connections
U15 pin 3 Analog sense DIODE P pin TEMPDIODE_P Analog U33 pin A9 —
U15 pin 4 Analog sense DIODE N pin TEMPDIODE_N Analog U33 pin E11 —
U15 pin 12 SMBus Data pin S4_SMBDATA
2.5-V CMOS
U33 pin B14
10-k Ω pull-up
resistor to 2.5 V
U15 pin 14 SMBus Clock pin S4_SMBCLK U33 pin A14
10-k Ω pull-up
resistor to 2.5 V
U15 pin 9 Over-Temperature signal OVERTEMPn U33 pin C14
10-k Ω pull-up
resistor to 2.5 V
U15 pin 11 Alert signal ALERTn U33 pin D14
10-k Ω pull-up
resistor to 2.5 V
Table 2–21. Temperature Sensor Component Reference
Board Reference Description Manufacturer
Manufacturing
Part Number
Manufacturer
Website
U15
Dual temperature sensor with
SMBus interface Maxim Integrated
Products, Inc.
MAX1619MEE+T www.maxim-ic.com