Datasheet

103
42023GS–SAM–03/2014
ATSAM4L8/L4/L2
9.5 Power Consumption
9.5.1 Power Scaling 0 and 2
The values in Table 9-6 are measured values of power consumption under the following condi-
tions, except where noted:
• Operating conditions for power scaling mode 0 and 2
–V
VDDIN
= 3.3V
– Power Scaling mode 0 is used for CPU frequencies under 36MHz
– Power Scaling mode 2 is used for CPU frequencies above 36MHz
• Wake up time from low power modes is measured from the edge of the wakeup signal to the
first instruction fetched in flash.
• Oscillators
– OSC0 (crystal oscillator) stopped
– OSC32K (32kHz crystal oscillator) running with external 32kHz crystal
– DFLL using OSC32K as reference and running at 48MHz
• Clocks
– DFLL used as main clock source
– CPU, AHB clocks undivided
– APBC and APBD clocks divided by 4
– APBA and APBB bridges off
– The following peripheral clocks running
• PM, SCIF, AST, FLASHCALW, APBC and APBD bridges
– All other peripheral clocks stopped
• I/Os are inactive with internal pull-up
• CPU is running on flash with 1 wait state
• Low power cache enabled
• BOD18 and BOD33 disabled
Table 9-6. ATSAM4L4/2 Current consumption and Wakeup time for power scaling mode 0 and 2
Mode Conditions T
A
Typical
Wakeup Time Typ Max
(1)
Unit
RUN
CPU running a Fibonacci algorithm
Linear mode
25°C
N/A
296 326
µA/MHz
85°C 300 332
CPU running a CoreMark algorithm
Linear mode
25°C N/A 320 377
85°C 326 380
CPU running a Fibonacci algorithm
Switching mode
25°C N/A 177 198
85°C 179 200
CPU running a CoreMark algorithm
Switching mode
25°C N/A 186 232
85°C 195 239