Datasheet
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Peripheral Conditions Typ. Units
SERCOMx.USART f
GCLK
=8MHz, Enable 65.5 μA
I2S
(3)
f
GCLK_I2S_0
=12.288MHz with source FDPLL with f
FDPLL
=49,152MHz 26.4 μA
DMAC
(4)
RAM to RAM transfer 399.5 μA
Note:
1. All TCs from 4 to 7 share the same power consumption values.
2. All SERCOMs from 0 to 5 share the same power consumption values.
3. The value includes the power consumption of the FDPLL.
4. The value includes the power consumption of the R/W access to the RAM.
37.8.2 USB Peripheral Power Consumption
Default conditions, except where noted:
• Operating conditions
– V
VDDIN
= 3.3 V
• Oscillators
– XOSC32K (32 kHz crystal oscillator) running with external 32kHz crystal in USB Host mode
• Clocks
– USB Device mode: DFLL48M in USB recovery mode (Crystal less)
– USB Host mode: DFLL48M in closed loop with XOSC32K (32 kHz crystal oscillator) running
with external 32kHz crystal
– CPU, AHB and APBn clocks undivided
• The following AHB module clocks are running: NVMCTRL, HPB2 bridge, HPB1 bridge, HPB0
bridge
– All other AHB clocks stopped
• I/Os are inactive with internal pull-up
• CPU in IDLE0 mode
• Cache enabled
• BOD33 disabled
In this default conditions, the power consumption I
default
is measured.
Measurements do not include consumption of clock source (ex: DFLL48M or FDPLL96M) and CPU.
However no CPU activity is required during all states (Suspend, IDLE, Data transfer).
Measurements have been done with an USB cable of 1.5m.
For USB Device mode, measurements include the maximum consumption (200μA) through pull-up
resistor on the D+ line for USB attach. This value depends on USB Host characteristic.
Operating modes:
• Run the USB Device/Host states in regards of the Universal Serial Bus (USB) v2.0 standard.
USB power consumption is provided in the following tables.
SAM D21 Family
Electrical Characteristics
© 2018 Microchip Technology Inc.
Datasheet Complete
DS40001882D-page 994