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What's the tie between current consumption and operating frequencies

Latest Updated:03/22/2017

Question:

What is the relationship between the current consumption and the operating frequencies?

Answer:

The graphs below show the 3.3 V-system power supply current when operating in single-chip mode and the power supply current thereof when reset.

(1) 3.3 V-system power supply current when operating in single-chip mode

[Measurement conditions]

  • Operation mode: Single-chip mode
  • 3.3 V-system power supply voltage: 2.5V to 4.0V
  • 5.0 V-system power supply voltage: 5.0V
  • Frequency: At XIN = 8 MHz and 10 MHz
  • Temperature: 25 degree C, 90 degree C, 110 degree C, 130 degree C
  • Operation program: All possible peripheral modules are kept operating.

Fig 1. 3.3 V-system power supply current when operating in single-chip mode

(2) Power supply current when reset

  • The power supply current during reset when measured under the same conditions as in (1).

Fig 2. Power supply current when reset
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