Intel MPRTM0020 Model Vehicle User Manual


 
26 Intel NetStructure
®
MPRTM0020 Technical Product Specification April 2006
Module Components
4.3.10 Power Supplies
The MPRTM0020 RTM needs several voltages that are not available from the SBC. The P30
connection to the SBC only provides two power supplies:
+12 V voltage rail (420 mA maximum current) is used as the main input voltage for the RTM
+3.3 V SUS voltage powers the management circuitry on the RTM (ADM1026, I
2
C pullup,
etc.)
Voltage regulation on the RTM is used to generate the additional required voltages, as shown in
Figure 13.
The four voltages that are generated on the RTM are used as follows:
+5V_SUS: The +5V_SUS is mainly used as an input voltage to drive the blue Hot Swap LED.
It is generated from the +3.3V_SUS using a boost regulator.
+5V: The 5 V payload voltage is generated from the +12 V power. To increase the power
conversion efficiency, a switching regulator is added. The 5 V is mainly used for USB power
and also used as a supply to 5 V/3.3 V linear regulator.
+3.3V: The 3.3 V voltage is used to drive the components on the SAS re-driver circuitry. This
voltage is also used to drive the Gigabit Ethernet LINK/ACTIVITY LEDs on the RTM.
Health Red LED Control 9
USB_OC Monitor 12
Payload Power Enable 2
Payload PowerGood 43
Table 13. GPIO Signal Mapping (Sheet 2 of 2)
GPIO Signals Pin on ADM1026
Figure 13. RTM Power Distribution
12V
+3.3V_SUS
Input via P30 (from
M PC BL0020)
12V/5V
Converter
+5V
5V/3.3V
Converter
3.3V/1.8V
Converter
+1.8V
+3.3V
3.3V/5V
Converter
+5V_SUS
For M anagem ent Circuitry