ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 11
ATmega32U4
Manufacturer Part Number
ATmega32U4
Description
Manufacturer
Atmel Corporation
Specifications of ATmega32U4
Flash (kbytes)
32 Kbytes
Pin Count
44
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
14
Hardware Qtouch Acquisition
No
Max I/o Pins
26
Ext Interrupts
13
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Twi (i2c)
1
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Adc Channels
12
Adc Resolution (bits)
10
Adc Speed (ksps)
15
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
Yes
Crypto Engine
No
Sram (kbytes)
3.3
Eeprom (bytes)
1024
Self Program Memory
YES
Dram Memory
No
Nand Interface
No
Picopower
No
Temp. Range (deg C)
-40 to 85
I/o Supply Class
2.7 to 5.5
Operating Voltage (vcc)
2.7 to 5.5
Fpu
No
Mpu / Mmu
no / no
Timers
4
Output Compare Channels
12
Input Capture Channels
2
Pwm Channels
8
32khz Rtc
No
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ATmega32U4-16AU
Manufacturer:
MAXIM
Quantity:
1 000
Company:
Part Number:
ATmega32U4-AU
Manufacturer:
FREESCALE
Quantity:
125
Company:
Part Number:
ATmega32U4-MUR
Manufacturer:
UCC
Quantity:
1 001
Part Number:
ATmega32U4RC-MU
Manufacturer:
ATMEL/爱特梅尔
Quantity:
20 000
4.7.1
4.7.2
4.7.3
7618C–AVR–07/08
First Request from Host
Second Request from Host
Answers from the Device
The Host sends a DFU Download request with a Display command in the data field.
The Host sends a DFU Upload request.
The device sends to the Host the firmware from the specified start address to the specified end
address.
Command Identifier
Id_display_data
OUT
SETUP
IN
IN
IN
03h
data[0]
SETUP
OUT
IN
00h
01h
02h
ZLP
DFU_UPLOAD
Firmware Packet 1
Firmware Packet 2
Firmware Packet n
data[1]
start_address
data[2]
DFU_DNLOAD
Display_Data (6 bytes)
ZLP
data[3]
end_address
data[4]
Display EEPROM Data
Blank Check in FLASH
Display FLASH Data
Description
11