ATmega32U4 Atmel Corporation, ATmega32U4 Datasheet - Page 6

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ATmega32U4

Manufacturer Part Number
ATmega32U4
Description
Manufacturer
Atmel Corporation
Datasheets

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

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4.5
4.5.1
6
Device Status
Get Status
The Host employs the DFU_GETSTATUS request to facilitate synchronization with the device.
This status gives information on the execution of the previous request: in progress/OK/Fail/...
The device responds to the DFU_GETSTATUS request with a payload packet containing the fol-
lowing data:
Table 4-4.
Table 4-5.
bmRequestType
Status
OK
errTARGET
errFILE
errWRITE
errERASE
errCHECK_ERAS
ED
errPROG
errVERIFY
errADDRESS
errNOTDONE
errFIRMWARE
Offset
1010 0001b
0010 0001b
0
1
4
5
DFU_GETSTATUS Response
bStatus values
DFU_GETSTATUS (3)
DFU_CLRSTATUS (4)
bwPollTimeOut
Value
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
0x08
0x09
0x0A
bStatus
bState
Field
iString
bRequest
Description
No error condition is present
File is not targeted for use by this device
File is for this device but fails some vendor-specific verification test
Device id unable to write memory
Memory erase function failed
Memory erase check failed
Program memory function failed
Programmed memory failed verification
Cannot program memory due to received address that is out of range
Received DFU_DNLOAD with wLength = 0, but device does not think it has all the
data yet.
Device’s firmware is corrupted. It cannot return to run-time operations
Size
3
1
1
1
wValue
Zero
Zero
Number
Number
Number
Value
Index
An indication of the status resulting from the
execution of the most recent request.
Minimum time in milliseconds that the host should
wait before sending a subsequent
DFU_GETSTATUS. The purpose of this field is to
allow the device to dynamically adjust the amount of
time that the device expects the host to wait
between the status phase of the next
DFU_DNLOAD and the subsequent solicitation of
the device’s status via DFU_GETSTATUS.
An indication of the state that the device is going to
enter immediately following transmission of this
response.
Index of status description in string table.
Interface (4)
Interface (4)
wIndex
Description
wLength
Zero
6
7618C–AVR–07/08
Status
Data
none

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