C8051F850-DK-UG Datasheet, PDF (13/36 Pages) Silicon Laboratories – UDP C8051F850 MCU CARD USER’S GUIDE FOR C8051F85X/86X MCUS

C8051F850-DK-UG
6. Using the C8051F850 MCU Card with the UDP Motherboard
6.1. 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 and connect the two left pins together when using the
motherboard with the C8051F850 MCU card.
UDP motherboard
power
J15
JP3 R24
VIO IN power J14
to VIO
power
JP2 R15
Radio card IN
power
J13
JP1
R6
to Radio card
power
VDD IN power
to VDD
power
C8051F351
Figure 8. Power Measurement Diagram with Shorting Blocks
6.2. 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 C8051F850 MCU 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 amongst 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 C8051F850 MCU card implements the signals described in Table 8, Table 9, Table 10, and Table 11 in the
Appendix.
Rev. 0.2
13