MachXO3-9400 Development Board
Evaluation Board User Guide
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FPGA-EB-02004-1.0
Figure 8.3. VCC Core Current Monitoring Circuit
8.4.
ASC Temperature Monitor
The ASC has two external Temperature Monitors (TMONs) which both are connected to on board temperature sensors
as listed in
Table 8.4
. One TMON is connected to a PNP transistor as shown in
Figure 8.4
and the other TMON is
connected to an NPN transistor as shown in
Figure 8.5
. Note that the noise suppression capacitors (C33 and C34) are
shown on the schematic as close to the transistors. However, they are physically close to the L-ASC10 (U7).
Table 8.4. ASC TMON Connections
Temperature Sensor (Reference)
ASC Signal Name
ASC Pin Number
ASC Breakout Test
Point
Comments
Temperature Sensor 1 (Q1)
TEMP_SENSE1P
21
TP32
PNP Type
TEMP_SENSE1N
22
TP33
Temperature Sensor 2 (Q2)
TEMP_SENSE2P
23
TP34
NPN Type
TEMP_SENSE2N
24
TP35
Figure 8.4. PNP Temperature Sensor Circuit
Figure 8.5. NPN Temperature Sensor Circuit
ASC_IMONN
[8]
ASC_IMONP
[8]
R181
0.020
R127
1
DNI
R123
1
VCC_CORE
+1.2V
+3.3V
R269
0
R270
0
VCC_CORE_P