AT90USB162 Atmel Corporation, AT90USB162 Datasheet - Page 9

• Manufacturer Part Number: AT90USB162
• Manufacturer: Atmel Corporation

Specifications of AT90USB162

• Flash (kbytes): 16 Kbytes
• Pin Count: 32
• Max. Operating Frequency: 16 MHz
• Cpu: 8-bit AVR
• Hardware Qtouch Acquisition: No
• Max I/o Pins: 22
• Ext Interrupts: 21
• 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): 0.5
• Eeprom (bytes): 512
• 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

4.6.1
4.6.1.1
4.6.1.2
4.6.1.3
7618C–AVR–07/08
Command Identifier
bmRequestType
Id_prog_start
0010 0001b
Request From Host
01h
Write Command
Firmware
DFU Suffix
The write command is 6 bytes long. In order to meet with the USB specification of the Control
type transfers, the write command is completed with 26 (= 32 - 6) non-significant bytes. The total
length of the command is then 32 bytes, which is the length of the Default Control Endpoint.
The firmware can now be downloaded to the device. In order to be in accordance with the Flash
page size (128 bytes), X non-significant bytes are added before the first byte to program. The X
number is calculated to align the beginning of the firmware with the Flash page. X =
start_address [32]. For example, if the start address is 00AFh (175d), X = 175 [32] = 15.
The DFU suffix of 16 bytes is added just after the last byte to program. This suffix is reserved for
future use.
data[0]
Offset
00h
01h
-10
-12
-14
DFU_DNLOAD (1)
Field
idVendor
idProduct
bcdDevice
bRequest
data[1]
start_address
data[2]
Size
2
2
2
wValue
wBlock
Value
BCD
data[3]
ID
ID
end_address
Description
The vendor ID associated with this file. Either FFFFh or
must match device’s vendor ID
The product ID associated with this file. Either FFFFh or
must match the device’s product ID
The release number of the device associated with this
file. Either FFFFh or a BCD firmware release or version
number
Interface (4)
wIndex
data[4]
wLength
Length
Init EEPROM programming
Init FLASH programming
Description
Firmware
Data
9