ATMEGA16U4-AU(2016) データシートの表示（PDF） - Atmel Corporation

部品番号

コンポーネント説明

メーカー

ATMEGA16U4-AU
(Rev.:2016)

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

Atmel Corporation 

power saving modes. The Idle mode stops the CPU while allowing the SRAM, Timer/Counters, SPI port, and

interrupt system to continue functioning. The Power-down mode saves the register contents but freezes the

Oscillator, disabling all other chip functions until the next interrupt or Hardware Reset. The ADC Noise

Reduction mode stops the CPU and all I/O modules except ADC, to minimize switching noise during ADC

conversions. In Standby mode, the Crystal/Resonator Oscillator is running while the rest of the device is

sleeping. This allows very fast start-up combined with low power consumption.

The device is manufactured using the Atmel® high-density nonvolatile memory technology. The On-chip ISP

Flash allows the program memory to be reprogrammed in-system through an SPI serial interface, by a

conventional nonvolatile memory programmer, or by an On-chip Boot program running on the AVR core. The

boot program can use any interface to download the application program in the application Flash memory.

Software in the Boot Flash section will continue to run while the Application Flash section is updated, providing

true Read-While-Write operation. By combining an 8-bit RISC CPU with In-System Self-Programmable Flash on

a monolithic chip, the device is a powerful microcontroller that provides a highly flexible and cost effective

solution to many embedded control applications.

The ATmega16U4/ATmega32U4 AVR is supported with a full suite of program and system development tools

including: C compilers, macro assemblers, program debugger/simulators, in-circuit emulators, and evaluation

kits.

2.2 Pin Descriptions

2.2.1 VCC

Digital supply voltage.

2.2.2 GND

Ground.

2.2.3

Port B (PB7..PB0)

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

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

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

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

Port B has better driving capabilities than the other ports.

Port B also serves the functions of various special features of the device as listed on page 74.

2.2.4

Port C (PC7,PC6)

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

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

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

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

Only bits 6 and 7 are present on the product pinout.

Port C also serves the functions of special features of the device as listed on page 77.

2.2.5

Port D (PD7..PD0)

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

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

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

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

ATmega16U4/32U4 [DATASHEET ]

5

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

Share Link: