1039
SAM4CP [DATASHEET]
43051E–ATPL–08/14
45.7
Power Supply Current Consumption
This section provides information about the current consumption on different power supply rails of the device. It gives
current consumption in low-power modes (Backup mode, Wait mode, Sleep mode) and in active mode (the application
running from memory, by peripheral). All the consumption values in sections 45.7.1 to 45.7.4 are measured with PLC
transceiver disabled (see
Table 45-54
in
Section 45.7.5
for PLC consumption values).
45.7.1 Backup Mode Current Consumption
The Backup mode configuration and measurements are defined as follows. The Configuration A is to achieve the lowest
possible current consumption in this mode, the Configurations B, C and D are typical use cases with crystal oscillator,
LCD and anti-tampering enabled.
Reminder: In Backup mode, the core voltage regulator is off and thus all the digital logics powered by VDDCORE is off.
The backup mode is a low-power mode with the lowest possible expenses of the start-up time.
45.7.1.1 Backup Mode Configuration A: Embedded slow clock RC Oscillator enabled
POR Backup on VDDBU is disabled.
RTC running.
RTT enabled on 1 Hz mode.
Force Wake-up (FWUP) enabled.
PLC in shutdown.
Current measurement as per
Figure 45-14 on page 1039
.
45.7.1.2 Backup Mode Configuration B: 32.768 kHz Crystal Oscillator enabled
POR Backup on VDDBU is disabled.
RTC running.
RTT enabled on 1 Hz mode.
Force Wake-up (FWUP) enabled.
Anti-tamper Input TMP0 enabled.
PLC in shutdown.
Current measurement as per
Figure 45-14 on page 1039
.
Figure 45-14. Measurement Setup for Configurations A and B
AMP1
VDDIN
VDDOUT
VDDCORE
1.6V to 3.6V
VDDBU
SAM4CP
VDDPLL
VDDLCD
VDDIO