参数资料
型号: USB-100
厂商: Fujitsu Semiconductor America Inc
文件页数: 64/143页
文件大小: 0K
描述: KIT STARTER FOR USB
标准包装: 1
类型: MCU
适用于相关产品: MB91F662
所含物品: 板,线缆
产品目录页面: 722 (CN2011-ZH PDF)
相关产品: 865-1099-ND - IC MCU 512KB FLASH FR80 120-LQFP
其它名称: 865-1108
The packets shown in Figure 4.9-3 are combined to form a frame for transferring over the USB.
Each packet will be explained.
All packets begin with a SYNC field. This is an 8-bit field used to synchronize the input data and
local clock on the input circuit. The SYNC field is used only for synchronizing. The frame starting
packet contains an SOF (Start of Frame) field after the SYNC field.
SOF is a type of PID (Packet ID), but used only for the frame starting packet. The Frame
Number field is for counting the number of frames.
The CRC (Cyclic Redundancy Check) field is used to detect transmission errors.
An EOP (End of Packet) is sent at the end of each packet.
In the token packet, the PID is followed by a 7-bit address and 4-bit endpoint number, plus a
5-bit CRC for detecting transmission errors.
In the data packet, the PID is followed by a 16-bit CRC for detecting transmission errors.
The side that receives the data sends a handshake packet.
Figure 4.9-3 USB packet format
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USBMLCF USB BDM INTERFACE MC P&E
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