ADM-XRC-7Z1 User Manual
V2.6 - 14th February 2022
4.10 System Monitoring
The 7Z1 has the ability to monitor temperature and voltage to maintain a check on the operation of the board.
The monitoring is implemented using an Atmel AVR microcontroller (uC).
The microcontroller continually measures all voltage rails and temperature sensors and transmits the results to
the FPGA, where they are stored in block-ram.
The following voltage rails and temperatures are monitored by the microcontroller:
Monitor
Purpose
VPWR
Board Input Supply (either 5.0V or 12.0V)
12V0
12V Board Input Supply
5V0
5V Board Input Supply
3V3
Board Input Supply
2V5
FPGA IO Supply
AUX_IO_2V0
FPGA Aux IO Supply
1V8
FPGA Aux Supply, Flash Memory
MGT_AUX_1V8
FPGA MGT Aux Supply
1V5
DDR3 SDRAM, Target FPGA memory I/O
VIO
Variable XRM IO Supply
1V0
FPGA Core Supply (VccINT)
MGT_1V2
FPGA MGT Vtt Supply
MGT_1V0
FPGA MGT Vcc Supply
3V3_INT
Internal 3.3V Supply
Temp1
microcontroller internal temperature
Temp2
TMP422 internal temperature
Temp3
FPGA on-die temperature (measured in TMP422)
Table 21 : Voltage and Temperature Monitors (in microcontroller)
The SDK includes an example application ("monitor") that read the system monitor sensor values.
4.10.1 Automatic Temperature Monitoring
The system monitor checks that the board and FPGA are being operated within the specified limits. If the
temperature is close to the limit, a "Warning Alarm" interrupt is set.
If a limit is exceeded, a "Critical Alarm" interrupt is set. After the Critical Alarm is set, there is a 5 second delay
before the system monitor unconfigures the FPGA by asserting its "PROG" pin.
The purpose of this mechanism is to protect the card from damage due to over-temperature. It is possible that it
will cause the user application and, possibly, the host computer to "hang".
The temperature limits are shown in Table Temperature Limits. Note that the Min and Max values include a 5°C
margin to prevent measurement errors triggering a false alarm.
Page 19
Functional Description
ad-ug-1253_v2_6.pdf
