The μPSD32xx family, from ST, consists of Flash programmable system devices with a 8032 MicrocontrollerCore. Of these, the μPSD3234A and μPSD3254A are notable for having a complete implementationof the USB hardware directly on the chip, complying with the Universal Serial Bus Specification, Revision1.1.This application note describes a demonstration program that has been written for the DK3200 hardwaredemonstration kit (incorporating a μPSD3234A device). It gives the user an idea of how simple it is to workwith the device, using the HID class as a ready-made device driver for the USB connection.IN-APPLICATION-PROGRAMMING (IAP) AND IN-SYSTEM-PROGRAMMING (ISP)Since the μPSD contains two independent Flash memory arrays, the Micro Controller Unit (MCU) can executecode from one memory while erasing and programming the other. Product firmware updates in thefield can be reliably performed over any communication channel (such as CAN, Ethernet, UART, J1850)using this unique architecture. For In-Application-Programming (IAP), all code is updated through theMCU. The main advantage for the user is that the firmware can be updated remotely. The target applicationruns and takes care on its own program code and data memory.IAP is not the only method to program the firmware in μPSD devices. They can also be programmed usingIn-System-Programming (ISP). A IEEE1149.1-compliant JTAG interface is included on the μPSD. Withthis, the entire device can be rapidly programmed while soldered to the circuit board (Main Flash memory,Secondary Boot Flash memory, the PLD, and all configuration areas). This requires no MCU participation.The MCU is completely bypassed. So, the μPSD can be programmed or reprogrammed any time, anywhere, even when completely uncommitted.Both methods take place with the device in its normal hardware environment, soldered to a printed circuitboard. The IAP method cannot be used without previous use of ISP, because IAP utilizes a small amountof resident code to receive the service commands, and to perform the desired operations.
標簽： Demonstration 3200 USB for
上傳時間： 2014-02-27
上傳用戶：zhangzhenyu
很多學習avr單片機的朋友都想親手做一個isp下載線，而下載線的設計方法又有好多種，我認為簡單實用是很重要的，我上傳的這個是基于usb接口的包括原理圖，pcb圖，，代碼文件都有，希望各位支持。
上傳時間： 2016-02-20
上傳用戶：stampede
USB子類協議.part2
上傳時間： 2013-05-22
上傳用戶：eeworm
USB HID Demonstrator Release 1.0.1
標簽： Demonstrator Release USB HID
上傳時間： 2013-04-15
上傳用戶：eeworm
USB子類協議.part3
上傳時間： 2013-08-03
上傳用戶：eeworm
usb_cdc AVR309 USB協議轉換到UART
上傳時間： 2013-07-19
上傳用戶：eeworm
USB技術大全
上傳時間： 2013-04-15
上傳用戶：eeworm
USB子類協議.part4
上傳時間： 2013-04-15
上傳用戶：eeworm
USB 1.1 協議 中文
上傳時間： 2013-05-24
上傳用戶：eeworm
USB HID Demonstrator Release 1.0.1
標簽： Demonstrator Release USB HID
上傳時間： 2013-08-04
上傳用戶：eeworm
