SiM3U1xx
2. Typical Connection Diagrams
This section provides typical connection diagrams for SiM3U1xx devices.
2.1. Power
regulator is in use and USB is not used.
SiM3U1xx Device
5 V (in)
VBUS
VREGn
3.3 V (out)
VREGIN
VIOHD
VDD
VIO
1 uF and 0.1 uF bypass
capacitors required for
each power pin placed
as close to the pins as
possible.
VSS
VSSHD
Figure 2.1. Connection Diagram with Voltage Regulator Used and No USB
regulator and USB are not used.
SiM3U1xx Device
1.8-3.6 V (in)
VBUS
VREGn
VREGIN
VIOHD
1 uF and 0.1 uF bypass
capacitors required for
each power pin placed
as close to the pins as
possible.
VDD
VIO
VSS
VSSHD
Figure 2.2. Connection Diagram with Voltage Regulator Not Used and No USB
regulator used and USB is connected (bus-powered).
6
Preliminary Rev. 0.8
SILABS [ SILICON LABORATORIES ]
