ATMEGA32U4-AU(2016) 데이터 시트보기 (PDF) - Atmel Corporation

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ATMEGA32U4-AU
(Rev.:2016)

8-bit Microcontroller with 16/32K bytes of ISP Flash and USB Controller

Atmel Corporation 

Port D also serves the functions of various special features of the ATmega16U4/ATmega32U4 as listed on

page 78.

2.2.6

Port E (PE6,PE2)

Port E is an 8-bit bi-directional I/O port with internal pull-up resistors (selected for each bit). The Port E output

buffers have symmetrical drive characteristics with both high sink and source capability. As inputs, Port E pins

that are externally pulled low will source current if the pull-up resistors are activated. The Port E pins are tri-

stated when a reset condition becomes active, even if the clock is not running.

Only bits 2 and 6 are present on the product pinout.

Port E also serves the functions of various special features of the ATmega16U4/ATmega32U4 as listed on

page 81.

2.2.7

Port F (PF7..PF4, PF1,PF0)

Port F serves as analog inputs to the A/D Converter.

Port F also serves as an 8-bit bi-directional I/O port, if the A/D Converter channels are not used. Port pins can

provide internal pull-up resistors (selected for each bit). The Port F output buffers have symmetrical drive

characteristics with both high sink and source capability. As inputs, Port F pins that are externally pulled low will

source current if the pull-up resistors are activated. The Port F pins are tri-stated when a reset condition

becomes active, even if the clock is not running.

Bits 2 and 3 are not present on the product pinout.

Port F also serves the functions of the JTAG interface. If the JTAG interface is enabled, the pull-up resistors on

pins PF7(TDI), PF5(TMS), and PF4(TCK) will be activated even if a reset occurs.

2.2.8

D-

USB Full speed / Low Speed Negative Data Upstream Port. Should be connected to the USB D- connector pin

with a serial 22 resistor.

2.2.9

D+

USB Full speed / Low Speed Positive Data Upstream Port. Should be connected to the USB D+ connector pin

with a serial 22 resistor.

2.2.10 UGND

USB Pads Ground.

2.2.11 UVCC

USB Pads Internal Regulator Input supply voltage.

2.2.12 UCAP

USB Pads Internal Regulator Output supply voltage. Should be connected to an external capacitor (1µF).

2.2.13 VBUS

USB VBUS monitor input.

6

ATmega16U4/32U4 [DATASHEET]

Atmel-7766J-USB-ATmega16U4/32U4-Datasheet_04/2016

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