9.3.4 Current Consumption Specifications

The values in this section are measured values of power consumption under the following conditions, except where noted:

  • Operating Conditions
    • VDD = 3.3V
    • Temperature at 25°C
    • CPU is running on Flash with one Wait state in PL0 and two Wait states in PL2
    • Low power cache is enabled
    • BOD33 is disabled
    • State of AT86RF212B is as specified in the following table
  • Oscillators
    • XOSC (crystal oscillator) is disabled
    • When MCU (ATSAML21) is in Active Performance Level 2 (PL2) mode, the DFLL48M is running at 48 MHz in Open-Loop mode
    • When MCU is in Active Performance Level 0 (PL0) mode, the internal multi RC oscillator is running at 8 MHz
  • Clocks
    • In the PL2 mode, DFLL48M is running in the Open-Loop mode and is used as main clock source
    • In the PL0 mode, OSC16M is used at 8 MHz
    • Clock masks and dividers are at Reset values: All AHB and APB clocks enabled, CPUDIV = 1, BUPDIV = 1 and LPDIV = 1
    • I/Os are configured in the Digital Functionality Disabled mode. Except for PA24 and PA25, which are used to provide UART input to device
Table 9-7. Current Consumption under Different Conditions(1)
Mode/Parameter MCU Conditions Transceiver Conditions Measured Current (Typical) Units
IBUSY_TX PL0 North American band, BPSK-40, fRF = 914 MHz — mA
TX_PWR setting = 11 26.97
TX_PWR setting = 5 18.71
TX_PWR setting = 0 14.5
TX_PWR setting = -25 11.1
PL2 North American band, BPSK-40, fRF = 914 MHz —
TX_PWR setting = 11 32.74
TX_PWR setting = 5 24.49
TX_PWR setting = 0 20.29
TX_PWR setting = -25 16.88
IRX_ON PL0 RX_PDT_LEVEL = 0x0; BPSK-20 fRF = 868.3 MHz 10.79
PL2 RX_PDT_LEVEL = 0x0, BPSK-20, fRF = 868.3 MHz 16.47
IPLL_ON PL0 PLL_ON 6.41
PL2 PLL_ON 12.12
ITRX_OFF PL0 TRX_OFF 1.68
PL2 TRX_OFF 7.39
ISTANDBY Standby; LPEFF Enable; PD0, PD1 and PD2 in Retention state with RTC running on OSCULP32K Sleep 2.03 µA
IBACKUP Backup with RTC running on OSCULP32K Sleep 0.77
Note:
  1. These values are based on characterization.
  2. All power consumption measurements are performed with CLKM disabled.