参数资料
型号: MC9328MXSCVP10R2
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 100 MHz, MICROPROCESSOR, PBGA225
封装: 13 X 13 MM, ROHS COMPLIANT, PLASTIC, MAPBGA-225
文件页数: 52/68页
文件大小: 1335K
代理商: MC9328MXSCVP10R2
Functional Description and Application Information
MC9328MXS Technical Data, Rev. 2
56
Freescale Semiconductor
Figure 46. SDRAM Self-Refresh Cycle Timing Diagram
4.9
USB Device Port
Four types of data transfer modes exist for the USB module: control transfers, bulk transfers, isochronous
transfers, and interrupt transfers. From the perspective of the USB module, the interrupt transfer type is
identical to the bulk data transfer mode, and no additional hardware is supplied to support it. This section
covers the transfer modes and how they work from the ground up.
Data moves across the USB in packets. Groups of packets are combined to form data transfers. The same
packet transfer mechanism applies to bulk, interrupt, and control transfers. Isochronous data is also moved
in the form of packets, however, because isochronous pipes are given a fixed portion of the USB
bandwidth at all times, there is no end-of-transfer.
SDCLK
CS
CAS
RAS
ADDR
DQ
DQM
BA
WE
CKE
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相关代理商/技术参数
参数描述
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