参数资料
| 型号： | AT90USBKEY2 |
| 厂商： | Atmel |
| 文件页数： | 13/22页 |
| 文件大小： | 0K |
| 描述： | KIT DEMO FOR AT90USB |
| 产品培训模块： | megaAVR Introduction |
| 标准包装： | 1 |
| 主要目的： | USB 控制器 |
| 嵌入式： | 是，MCU，8 位 |
| 已用 IC / 零件： | AT90USB1286，AT90USB1287，AT90USB646，AT90USB647 |
| 已供物品： | 板，线缆 |
| 产品目录页面： | 611 (CN2011-ZH PDF) |
| 配用： | ATSTK525-ND - KIT STARTER FOR AT90USB |
| 相关产品： | AT90USB1287-16AUR-ND - IC MCU AVR 128K ISP USB TQFP64 AT90USB82-16MUR-ND - MCU AVR USB 8K FLASH 32-QFN AT90USB162-16MU-ND - MCU AVR USB 16K FLASH 32-QFN AT90USB162-16AU-ND - MCU AVR USB 16K FLASH 32-TQFP AT90USB162-16MURDKR-ND - IC AVR MCU 16K FLASH 32QFN AT90USB162-16AURDKR-ND - IC AVR MCU 16K FLASH 32TQFP AT90USB82-16MU-ND - IC AVR MCU 8K FLASH 32QFN AT90USB162-16MURCT-ND - IC AVR MCU 16K FLASH 32QFN AT90USB162-16AURCT-ND - IC AVR MCU 16K FLASH 32TQFP AT90USB162-16MURTR-ND - IC AVR MCU 16K FLASH 32QFN 更多... |
| 其它名称： | AT90USBKEY AT90USBKEY-ND |
Using the AT90USBKey
2.5
2.5.1
In-System Programming
Programming with USB bootloader: DFU (Device Firmware Upgrade)
AT90USB part comes with a default factory pre-programmed USB bootloader located in
the on-chip boot section of the AT90USB. This is the easiest and fastest way to
reprogram the device directly over the USB interface. The “Flip” PC side application, is
available from the Atmel website, offers a flexible an user friendly interface to reprogram
the application over the USB bus.
The HWB pin of the AT90USB allows to force the bootloader section execution after
reset. (Refer to AT90USB datasheet section “boot loader support”). To force bootloader
execution, operate as follow:
Press both “RST” and “HWB” push buttons
First release the “RST” push button
Release the “HWB” push button
For more information about the USB bootloader and “Flip” application, please refer to
the “USB bootloader datasheet document” and “Flip’s user manual”.
Note:
The HWB pin is active only if the HWBE fuse is set (default factory configuration).
2.5.2
Programming with AVR JTAGICEmKII
The AT90USB can be programmed using specific JTAG link. To use the AVR
JTAGICEmkII with an AT90USBKey an optional HE10 connector should be soldered to
J9 footprint. Then the JTAG probe can be connected to the AT90USBKey as shown in
Figure 2-10 .
AT90USBKey Hardware User Guide
Note:
When the JTAGEN Fuse is unprogrammed, the four TAP pins are normal port pins, and
the TAP controller is in reset. When programmed, the input TAP signals are internally
pulled high and the JTAG is enabled for Boundary-scan and programming. The
AT90USB device is shipped with this fuse programmed.
2-13
7627A–AVR–04/06
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