參數(shù)資料
型號(hào): DRM064
英文描述: Single Phase On-Line UPS Using MC9S12E128
中文描述: 單相在線式UPS使用MC9S12E128
文件頁數(shù): 15/26頁
文件大?。?/td> 485K
代理商: DRM064
USB Thumb Drive Designer Reference Manual, Rev. 0
Freescale Semiconductor
15
Chapter 4
Firmware
4.1 System Software Architecture
Figure 4-1. System Software Architecture
Figure 4-1
shows the system software architecture for the UF32 Thumb Drive. The mini-kernel is
designed for the multi-tasks operation. In this application, mini-kernel is mainly working for the USB event
task after system initialization. The initialization subroutines are for the system initialization, such as for
timer module, 3.3 voltage regulator, SM module, IQUE module, IQUE RAM mapping, SM RAM for logical
to physical look up table and USB module.
The main program continually checks the tasks and to serve the event once the request is made. It will
decode to invoke the SCSI commands if the request is made from PC via USB2.0 interface.
All data will pass through the IQUE RAM and read/write to NAND Flash.
Mini-Kernel
for UF32
USB Protocol Layer
Mass Storage
Interface Module
Application Task
(Protocol Adapter)
Mass
Storage
Device
SM Protocol Module
MCU Resources (Timer)
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