STM32F479AI datasheet(106/208 Pages) STMICROELECTRONICS

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Electrical characteristics

STM32F479xx

106/208

DocID028010 Rev 2

On-chip peripheral current consumption

The MCU is placed under the following conditions:

•

At startup, all I/O pins are in analog input configuration.

•

All peripherals are disabled unless otherwise mentioned.

•

I/O compensation cell enabled.

•

The ART accelerator is ON.

•

Scale 1 mode selected, internal digital voltage V12 = 1.32 V.

•

HCLK is the system clock. fPCLK1 = fHCLK/4, and fPCLK2 = fHCLK/2.

The given value is calculated by measuring the difference of current consumption

–

with all peripherals clocked off

–

with only one peripheral clocked on

–fHCLK = 180 MHz (Scale1 + over-drive ON), fHCLK = 144 MHz (Scale 2),

fHCLK = 120 MHz (Scale 3)

•

Ambient operating temperature is 25 °C and VDD=3.3 V.

IDDIO

I/O switching

Current

VDD = 3.3 V

CEXT = 10 pF

C = CINT + CEXT + CS

2 MHz

0.18

8 MHz

0.67

25 MHz

2.09

50 MHz

3.6

60 MHz

4.5

84 MHz

7.8

90 MHz

9.8

VDD = 3.3 V

CEXT = 22 pF

C = CINT + CEXT + CS

2 MHz

0.26

8 MHz

1.01

25 MHz

3.14

50 MHz

6.39

60 MHz

10.68

VDD = 3.3 V

CEXT = 33 pF

C = CINT + Cext + CS

2 MHz

0.33

8 MHz

1.29

25 MHz

4.23

50 MHz

11.02

1. CS is the PCB board capacitance including the pad pin. CS = 7 pF (estimated value).

2. This test is performed by cutting the LQFP176 package pin (pad removal).

Table 32. Switching output I/O current consumption(1) (continued)

Symbol

Parameter

Conditions

I/O toggling

frequency

(fsw)

Typ

Unit

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