General
Table 6. Power consumption operating behaviors (continued)
Symbol Description
Min.
Typ.
Max.
Unit
Notes
IDD_VBAT Average current when CPU is not accessing
RTC registers
10
• @ 1.8V
• @ –40 to 25°C
• @ 70°C
—
—
—
0.57
0.90
2.4
0.67
1.2
μA
μA
μA
• @ 105°C
• @ 3.0V
3.5
• @ –40 to 25°C
• @ 70°C
—
—
—
0.67
1.0
0.94
1.4
μA
μA
μA
• @ 105°C
2.7
3.9
1. The analog supply current is the sum of the active or disabled current for each of the analog modules on the device. See
each module's specification for its supply current.
2. 72MHz core and system clock, 36MHz bus clock, and 24MHz flash clock. MCG configured for FEE mode. All peripheral
clocks disabled.
3. 72MHz core and system clock, 36MHz bus clock, and 24MHz flash clock. MCG configured for FEE mode. All peripheral
clocks enabled.
4. Max values are measured with CPU executing DSP instructions.
5. 25MHz core, system, bus and flash clock. MCG configured for FEI mode.
6. 4 MHz core and system clock, 4 MHz and bus clock, and 1 MHz flash clock. MCG configured for BLPE mode. All
peripheral clocks disabled. Code executing from flash.
7. 4 MHz core and system clock, 4 MHz and bus clock, and 1 MHz flash clock. MCG configured for BLPE mode. All
peripheral clocks enabled but peripherals are not in active operation. Code executing from flash.
8. 4 MHz core and system clock, 4 MHz and bus clock, and 1 MHz flash clock. MCG configured for BLPE mode. All
peripheral clocks disabled.
9. Data reflects devices with 128 KB of RAM. For devices with 64 KB of RAM, power consumption is reduced by 2 μA.
10. Includes 32kHz oscillator current and RTC operation.
5.2.5.1 Diagram: Typical IDD_RUN operating behavior
The following data was measured under these conditions:
• MCG in FBE mode for 50 MHz and lower frequencies. MCG in FEE mode at greater
than 50 MHz frequencies.
• USB regulator disabled
• No GPIOs toggled
• Code execution from flash with cache enabled
• For the ALLOFF curve, all peripheral clocks are disabled except FTFL
K51 Sub-Family Data Sheet, Rev. 2, 4/2012.
Freescale Semiconductor, Inc.
17
FREESCALE [ Freescale ]
