ATmega32U2 Atmel Corporation, ATmega32U2 Datasheet - Page 12
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ATmega32U2
Manufacturer Part Number
ATmega32U2
Description
Manufacturer
Atmel Corporation
Specifications of ATmega32U2
Flash (kbytes)
32 Kbytes
Pin Count
32
Max. Operating Frequency
16 MHz
Cpu
8-bit AVR
# Of Touch Channels
12
Hardware Qtouch Acquisition
No
Max I/o Pins
22
Ext Interrupts
20
Usb Transceiver
1
Usb Speed
Full Speed
Usb Interface
Device
Spi
2
Uart
1
Graphic Lcd
No
Video Decoder
No
Camera Interface
No
Analog Comparators
1
Resistive Touch Screen
No
Temp. Sensor
No
Crypto Engine
No
Sram (kbytes)
1
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
2
Output Compare Channels
5
Input Capture Channels
1
Pwm Channels
4
32khz Rtc
No
Calibrated Rc Oscillator
Yes
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
4.7.4
4.8
4.8.1
4.8.2
12
Reading Configuration Information or Manufacturer Information
Answers from the Device to a Blank Check Command
Requests From Host
Answers from Bootloader
The Host controller sends a GET_STATUS request to the device. Once internal blank check has
been completed, the device sends its status.
The flow described hereafter allows the user to read the configuration or manufacturer
information.
To start the programming operation, the Host sends DFU_DNLOAD request with the Read com-
mand in the data field (2 bytes).
The device has two possible answers to a DFU_GETSTATUS request:
Command Identifier
• If the device status is “OK”:
• If the device status is “errCHECK_ERASED”:
• If the chip is protected from program access, an “err_VENDOR” status is returned to the
• Otherwise, the device status is “OK“. The Host can send a DFU_UPLOAD request to the
Id_read_command
the device memory is then blank and the device waits for the next Host request.
the device memory is not blank. The device waits for an DFU_UPLOAD request to send the
first address where the byte is not 0xFF.
Host.
device in order to get the value of the requested field.
05h
data[0]
SETUP
OUT
IN
00h
01h
data[1]
00h
01h
02h
30h
31h
60h
61h
data[2]
Read_command (2 bytes)
DFU_DNLOAD
ZLP
data[3]
data[4]
Read Bootloader Version
Read Device boot ID1
Read Device boot ID2
Read Manufacturer Code
Read Family Code
Read Product Name
Read Product Revision
Description
7618C–AVR–07/08