UG534 Datasheet, PDF (71/96 Pages) –

Detailed Description
22. System Monitor
The System Monitor provides information regarding the FPGA on-chip temperature and
power supply conditions via JTAG and an internal FPGA interface. The System Monitor
can also be used to monitor external analog signals via 17 external analog input channels.
For more information regarding this functionality, which is featured on every Virtex-6
family member, see http://www.xilinx.com/systemmonitor.
This section provides a brief overview of the System Monitor related functionality that is
supported on the ML605.
Reference and Power Supply
The System Monitor has dedicated analog power supply pins and supports the use of an
external 1.25V reference IC (U23) for the analog-to-digital conversion process. An option
(using jumper J19) to select an on-chip reference is also provided; however, the highest
accuracy over a temperature range of -40°C to +125°C is obtained using an external
reference. Figure 1-29 illustrates the power supply and reference options on the ML605.
For a more detailed discussion of these requirements, see the Virtex-6 FPGA System Monitor
User Guide. [Ref 15]
X-Ref Target - Figure 1-29
VCC2V5
Analog Supply Filter
SYSMON_AVDD
C190
X5R
6.3V
1UF
C78
X5R
10V
0.1UF
VCC5
U23
AGND
REF3012
REF3012AIDBZT
1
2
IN
OUT
1.25V
J19
3
2
1
SYSMON_VREFP
C383
X5R
10V
0.1UF
Ferrie Bead
C191
X5R
6.3V
1UF
GND
3
C79
X5R
10V
0.1UF
AGND
Jumper on pins 1-2
Default Setting:
1-2 Select External Reference
GND
AGND
2-3 Select On-Chip Reference
UG534_29_081209
Figure 1-29: System Monitor External Reference
ML605 Hardware User Guide
www.xilinx.com
71
UG534 (v1.8) October 2, 2012