參數(shù)資料
型號: MC9328MX21VK
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 32-BIT, 266 MHz, MICROPROCESSOR, PBGA289
封裝: 14 X 14 MM, 1.41 MM HEIGHT, 0.65 MM PITCH, LEAD FREE, PLASTIC, MAPBGA-289
文件頁數(shù): 59/100頁
文件大小: 1979K
代理商: MC9328MX21VK
Specifications
MC9328MX21 Technical Data, Rev. 3.4
Freescale Semiconductor
61
3.18
USB On-The-Go
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, but because isochronous pipes are given a fixed portion of the USB bandwidth at
all times, there is no end-of-transfer.
Figure 50. USB Timing Diagram for Data Transfer to USB Transceiver (TX)
Table 40. USB Timing Parameters for Data Transfer to USB Transceiver (TX)
Ref
No.
Parameter
3.0 V
± 0.3 V
Unit
Minimum
Maximum
1tOEB_TXDP; USBD_OE active to USBD_TXDP low
83.14
83.47
ns
2tOEB_TXDM; USBD_OE active to USBD_TXDM high
81.55
81.98
ns
3tTXDP_OEB; USBD_TXDP high to USBD_OE deactivated
83.54
83.8
ns
4tTXDM_OEB; USBD_TXDM low to USBD_OE deactivated (includes SE0)
248.9
249.13
ns
5tFEOPT; SE0 interval of EOP
160
175
ns
6tPERIOD; Data transfer rate
11.97
12.03
Mb/s
USB_ON
(Output)
USB_OE
(Output)
USB_TXDP
(Output)
USB_TXDM
(Output)
USB_VP
(Input)
USB_VM
(Input)
t OEB_TXDP
t TXDM_OEB
tTXDP_OEB
tFEOPT
tOEB_TXDM
tPERIOD
1
2
3
4
5
6
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC9328MX21VK 制造商:Freescale Semiconductor 功能描述:Microprocessor
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