SiM3U157-B-GM Silicon Labs, SiM3U157-B-GM Datasheet - Page 6
SiM3U157-B-GM
Manufacturer Part Number
SiM3U157-B-GM
Description
ARM Microcontrollers - MCU ARM Cortex-M3 USB 128KB LGA92
Manufacturer
Silicon Labs
Datasheet
1.SIM3U157-B-GM.pdf
(94 pages)
Specifications of SiM3U157-B-GM
Rohs
yes
Core
ARM Cortex M3
Processor Series
SIM3U1xx
Data Bus Width
32 bit
Maximum Clock Frequency
80 MHz
Program Memory Size
128 KB
Data Ram Size
32 KB
On-chip Adc
Yes
Operating Supply Voltage
1.8 V to 3.6 V
Operating Temperature Range
- 40 C to + 85 C
Package / Case
LGA-92
Mounting Style
SMD/SMT
Length
7 mm
Maximum Operating Temperature
+ 85 C
Minimum Operating Temperature
- 40 C
Number Of Programmable I/os
65
Number Of Timers
2 x 32 bit
Supply Voltage - Max
3.6 V
Supply Voltage - Min
1.8 V
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SiM3U1xx
Figure 2.3. Connection Diagram with Voltage Regulator Used and USB Connected (Bus-Powered)
Figure 2.4 shows a typical connection diagram for the power pins of the SiM3U1xx devices when the internal
regulator used and USB is connected (self-powered). The VBUS signal is used to detect when USB is connected
to a host device.
Figure 2.4. Connection Diagram with Voltage Regulator Used and USB Connected (Self-Powered)
Figure 2.5 shows a typical connection diagram for the power pins of the SiM3U1xx devices when the internal
regulator used, USB is connected (bus-powered), and the VIO and VIOHD pins are sourced from separate
supplies.
6
1 uF and 0.1 uF bypass
each power pin placed
capacitors required for
as close to the pins as
1 uF and 0.1 uF bypass
each power pin placed
capacitors required for
as close to the pins as
possible.
possible.
USB 5 V
(sense)
USB 5 V (in)
3.6-5.5 V (in)
3.3 V (out)
Rev. 1.0
3.3 V (out)
VREGIN
VSSHD
VIOHD
VBUS
VDD
VSS
VIO
VREGIN
VSSHD
VIOHD
VBUS
VDD
VSS
VIO
SiM3U1xx Device
SiM3U1xx Device
VREGn
VREGn
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