参数资料
型号: MC9328MXSVP10R2
厂商: Freescale Semiconductor
文件页数: 60/74页
文件大小: 0K
描述: IC MCU I.MXS 100MHZ 225-MAPBGA
标准包装: 1,000
系列: i.MXS
核心处理器: ARM9
芯体尺寸: 32-位
速度: 100MHz
连通性: EBI/EMI,I²C,SPI,SSI,UART/USART,USB
外围设备: DMA,I²S,LCD,POR,PWM,WDT
输入/输出数: 97
程序存储器类型: ROMless
电压 - 电源 (Vcc/Vdd): 1.7 V ~ 3.3 V
振荡器型: 外部
工作温度: 0°C ~ 70°C
封装/外壳: 225-LFBGA
包装: 带卷 (TR)
Functional Description and Application Information
MC9328MXS Technical Data, Rev. 3
Freescale Semiconductor
63
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.
Figure 47. USB Device Timing Diagram for Data Transfer to USB Transceiver (TX)
Table 26. USB Device Timing Parameters for Data Transfer to USB Transceiver (TX)
Ref
No.
Parameter
3.0 ± 0.3 V
Unit
Minimum
Maximum
1tROE_VPO; USBD_ROE active to USBD_VPO low
83.14
83.47
ns
2tROE_VMO; USBD_ROE active to USBD_VMO high
81.55
81.98
ns
3tVPO_ROE; USBD_VPO high to USBD_ROE deactivated
83.54
83.80
ns
4tVMO_ROE; USBD_VMO low to USBD_ROE deactivated (includes SE0)
248.90
249.13
ns
USBD_AFE
(Output)
USBD_ROE
(Output)
USBD_VPO
(Output)
USBD_VMO
(Output)
USBD_SUSPND
(Output)
USBD_RCV
(Input)
USBD_VP
(Input)
USBD_VM
(Input)
t ROE_VPO
t VMO_ROE
tVPO_ROE
tFEOPT
tROE_VMO
tPERIOD
1
2
3
4
5
6
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