LQFP144 datasheet(94/204 Pages) STMICROELECTRONICS

Part #	LQFP144

Description	Arm® Cortex®-M4 32b MCUFPU, 210DMIPS, up to 1MB Flash/1924KB RAM, USB OTG HS/FS, Ethernet, 17 TIMs, 3 ADCs, 15 comm. interfaces & camera

PDF	204 Pages

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

Direct Link	http://www.st.com

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94 / 204 page

Electrical characteristics

STM32F405xx, STM32F407xx

94/203

DS8626 Rev 9

floating pins, they must either be configured in analog mode, or forced internally to a definite

digital value. This can be done either by using pull-up/down resistors or by configuring the

pins in output mode.

I/O dynamic current consumption

In addition to the internal peripheral current consumption measured previously (see

Table 28: Peripheral current consumption), the I/Os used by an application also contribute

to the current consumption. When an I/O pin switches, it uses the current from the MCU

supply voltage to supply the I/O pin circuitry and to charge/discharge the capacitive load

(internal or external) connected to the pin:

ISW

VDD fSW C

where

ISW is the current sunk by a switching I/O to charge/discharge the capacitive load

VDD is the MCU supply voltage

fSW is the I/O switching frequency

C is the total capacitance seen by the I/O pin: C = CINT+ CEXT

The test pin is configured in push-pull output mode and is toggled by software at a fixed

frequency.

LQFP144 Datasheet(PDF) 94 Page - STMicroelectronics