UPMU-M3L1X-B-EK Silicon Labs, UPMU-M3L1X-B-EK Datasheet - Page 6

• Manufacturer Part Number: UPMU-M3L1X-B-EK
• Description: Daughter Cards & OEM Boards UDP SiM3L1xx MCU Card (no LCD)
• Manufacturer: Silicon Labs

Specifications of UPMU-M3L1X-B-EK

• Product: MCU Cards
• Core: ARM Cortex M3
• Data Bus Width: 32 bit
• Description/function: MCU Card (No LCD) to use with UDP Motherboard
• Interface Type: I2C, SPI, UART
• Maximum Operating Temperature: + 85 C
• Minimum Operating Temperature: - 40 C
• Tool Is For Evaluation Of: SiM3L1xx
• For Use With: SiM3L1xx

SiM3L1xx
2. Typical Connection Diagrams
This section provides typical connection diagrams for SiM3L1xx devices.
2.1. Power
Figure 2.1 shows a typical connection diagram for the power pins of the SiM3L1xx devices when the dc-dc buck
converter is not used.
Figure 2.2 shows a typical connection diagram for the power pins of the SiM3L1xx devices when the internal dc-dc
buck converter is in use and I/O are powered directly from the battery.
Figure 2.3 shows a typical connection diagram for the power pins of the SiM3L1xx devices when used with an
external radio device like the Silicon Labs EZRadio
6
1 uF and 0.1 uF bypass
capacitors required for
each power pin placed
as close to the pins as
Figure 2.2. Connection Diagram with DC-DC Converter Used and I/O Powered from Battery
possible.
1 uF and 0.1 uF bypass
capacitors required for
each power pin placed
as close to the pins as
4.7, 0.1, and 0.01 uF
VBAT/VBATDC input
Figure 2.1. Connection Diagram with DC-DC Converter Unused
bypass capacitors
possible.
required on
VBAT/VBATDC
VIORF
VLCD
10 uF capacitor required
VIO
on the VLCD pin
Converter
SiM3L1xx Device
DC-DC
®
VBAT/VBATDC
or EZRadioPRO
Rev 0.5
Low Dropout
Regulator
(LDO0)
VIORF
VLCD
10 uF capacitor required
VIO
on the VLCD pin
Converter
SiM3L1xx Device
DC-DC
®
devices.
IND
VDC
VDRV
VSSDC
VSS
Low Dropout
Regulator
(LDO0)
to external
circuitry
required between the
IND and VDC pins
0.56 uH inductor
IND
VDC
VSSDC
VSS
VDRV
required on VDC output
2.2, 0.1, and 0.01 uF
bypass capacitors