User`s guide

UDP SiM3U1xx
16 Rev. 0.2
5. Using the UDP SiM3U1xx MCU Card with the UDP Motherboard
5.1. Current Measurement
The power measurement circuitry on the UDP motherboard consists of a Silicon Labs C8051F351 8051 MCU that
measures both input voltage and current consumption of the MCU card, I/O expander, and radio test card. Install a
shorting block on the UDP Motherboard J13 and J15 connecting the two left pins together when using the
motherboard with the SiM3U1xx MCU card.
Figure 7. Power Measurement Diagram with Shorting Blocks
5.2. MCU Card Header Connections
The MCU card has four connectors with 100 pins each. These 400 pins are directly tied to the UDP motherboard
and I/O cards. These signals are named and designed to support a wide variety of features and applications, and
the UDP SiM3U1xx card implements a subset of these connections.
The MCU cards and I/O cards are designed so that a maximum number of functions are shared between each
card. This allows a particular type of I/O card to be shared among all MCU cards that connect to the same signals.
The MCU card slot includes the following components:
J1 MCU card connector H1
J2 MCU card connector H2
J3 MCU card connector H3
J4 MCU card connector H4
The UDP SiM3U1xx card implements the signals described in Table 8, Table 9, Table 10, and Table 11 in the
Appendix.
UDP motherboard
power
to VIO
power
VIO IN power
to Radio card
power
Radio card IN
power
to VDD
power
VDD IN powerJ15 J14 J13
C8051F351
JP3 JP2 JP1R24
R15
R6