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68 www.xilinx.com ML605 Hardware User Guide
UG534 (v1.2.1) January 21, 2010
Chapter 1: ML605 Evaluation Board
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 h
ttp://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
Figure 1-29: System Monitor External Reference
VCC5
VCC2V5
IN
OUT
GND
REF3012
Jumper on pins 1-2
Default Setting:
1-2 Select External Reference
2-3 Select On-Chip Reference
SYSMON_AVDD
Analog Supply Filter
Ferrie Bead
12
3
U23
REF3012AIDBZT
X5R
10V
0.1UF
C383
X5R
10V
0.1UF
C78
C79
0.1UF
10V
X5R
X5R
6.3V
1UF
C191
C190
1UF
6.3V
X5R
1
2
1.25V
AGND
AGND
GND
SYSMON_VREFP
1
2
3
J19
AGND
UG534_29_081209