MC9328MX1VM20 Freescale, MC9328MX1VM20 Datasheet - Page 82
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MC9328MX1VM20
Manufacturer Part Number
MC9328MX1VM20
Description
Manufacturer
Freescale
Datasheet
1.MC9328MX1VM20.pdf
(100 pages)
Specifications of MC9328MX1VM20
Operating Temperature (min)
0C
Operating Temperature (max)
70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Lead Free Status / RoHS Status
Compliant
Available stocks
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Part Number:
MC9328MX1VM20
Manufacturer:
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Quantity:
10 000
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MC9328MX1VM20R2
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Functional Description and Application Information
4.14
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.
82
SDCLK
USB Device Port
ADDR
DQM
RAS
CAS
CKE
WE
DQ
CS
BA
Figure 60. SDRAM Self-Refresh Cycle Timing Diagram
MC9328MX1 Technical Data, Rev. 7
Freescale Semiconductor
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