SIM3U1XX-B-DK Silicon_Laboratories, SIM3U1XX-B-DK Datasheet - Page 16

• Manufacturer Part Number: SIM3U1XX-B-DK
• Description: Specifications: Lead Free Status: Lead Free ; RoHS Status: RoHS Compliant
• Manufacturer: Silicon_Laboratories

UDP SiM3U1xx
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.
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:
The UDP SiM3U1xx card implements the signals described in Table 8, Table 9, Table 10, and Table 11 in the
Appendix.
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UDP motherboard
power
J1
J2
J3
J4
JP3
J15
R24
Figure 7. Power Measurement Diagram with Shorting Blocks
MCU card connector H1
MCU card connector H2
MCU card connector H3
MCU card connector H4
to VIO
power
VIO IN power
JP2
J14
R15
Rev. 0.2
C8051F351
to Radio card
power
Radio card IN
power
JP1
J13
R6
to VDD
power
VDD IN power