50 SBC347A 3U VPX Single Board Computer
Publication No. 500-9300527837-000 Rev. A.0
5.15.1 Power Manager/Monitor
The SBC347A uses a Lattice ispPOWR-1014A programmable power manager to
control all of the onboard power supplies to meet supply sequencing
requirements. See
on
for more
information.
LINK
For more details on the Power Manager device, see
http://www.latticesemi.com
.
In addition to controlling the onboard supplies, the power manager also monitors
each rail, and its voltage can be read from registers internal to the device, across
the I
2
C interface.
The following table lists the software monitor points:
The Power Manager drives a green Power Good LED (DS407) when all onboard
power supplies are within tolerance. It also drives a yellow Sleep Status LED
(DS406) to indicate when the board is in an S3, S4, or S5 sleep state. See
5.15.2 Board Temperature Sensor
An LM92 digital temperature sensor monitors the ambient temperature on the
printed circuit board (PCB), and can be used by system health monitoring
software (either on the SBC347A or on an external IPMI controller) to determine
the ambient operating temperature of the board. The sensor has an accuracy of
±0.33 °C.
LINK
For more details on the LM92 device, see
.
5.15.3 CPU Die Temperature Sensor
An ADT7461 device monitors the on-die temperature of the CPU and can be used
by system health monitoring software on an external IPMI controller to determine
the temperature of the CPU device.
Onboard software should determine the CPU temperature from dedicated
registers within the CPU.
Table 5-14 Power Manager Monitor Input Connections
Input
Rail
Monitored
Nominal Voltage
VMON1
P3V3_AUX
+3.3 V
VMON2
P5V_VS3
+5.0 V
VMON3
P3V3_VS2
+3.3 V
VMON4
VCC_IN
+1.8 V
VMON5
P1V35
+1.35 V
VMON6
P1V05
+1.05 V
VMON7
P1V2
+1.2 V
VMON8
P3V3
+3.3 V
VMON9
P0V8
+0.8 V