MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 263
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MCF5272VF66
Manufacturer Part Number
MCF5272VF66
Description
Manufacturer
Freescale
Datasheet
1.MCF5272VF66.pdf
(544 pages)
Specifications of MCF5272VF66
Family Name
MCF5xxx
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
66MHz
Instruction Set Architecture
RISC
Supply Voltage 1 (typ)
3.3V
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Surface Mount
Pin Count
196
Package Type
MA-BGA
Lead Free Status / RoHS Status
Not Compliant
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12.2.1.4
The MCF5272 has eight independent endpoint controllers that manage data transfer between the on-chip
CPU and the USB host for each endpoint. These controllers provide event notification to the user and
manage the IN and OUT FIFO dual-port RAM buffers.
The USB endpoint configuration registers (USBEPOCFGn or USBEPICFGn) are used to configure each
endpoint to support either control, interrupt, bulk, or isochronous transfers.
USB always uses endpoint 0 as a control pipe, so it must be configured for control transfer mode.
Additional control pipes can be provided by other endpoints.
A total of 1024 bytes of dual-port RAM are available for transmit and receive FIFO buffers. This RAM is
partitioned to provide 512 bytes for each direction. The user is responsible for configuring the FIFO for
each endpoint. This configuration is flexible within the following constraints:
For example, an endpoint with a maximum packet size of 32 bytes can have a FIFO size of 64, 128, or 256
bytes and a starting address of 0, 64, 128, 192, 256, etc.
12.2.1.5
The MCF5272 USB request processor automatically processes all of the USB standard requests listed in
Table 12-1
is passed to the user as a vendor-specific request. The USB module responds with a request error when the
SET
Specification. See beginning of Page 12-1.
Freescale Semiconductor
get_configuration
_
Device Request
•
•
•
get_descriptor
DESCRIPTOR
clear_feature
get_interface
FIFO size must be an integral power of 2
FIFO size must be at least twice the maximum packet size
FIFO starting address must be aligned on a boundary defined by the FIFO size.
except for
Endpoint Controllers
USB Request Processor
request is issued. These standard requests are defined in Chapter 9 of the USB
Request processor clears the feature specified by the feature selector parameter. Currently, remote
wakeup and endpoint halt are the only features defined by the USB specification. If the feature to be
cleared is remote wakeup, the USB block disables the remote wakeup functionality. If the feature to be
cleared is endpoint halt, the request processor activates the selected endpoint. The user is notified
when the remote wakeup is disabled or an endpoint halt is cleared.
Returns the current configuration as set by a previous
notification is provided. No user action required.
Reads the specified device or configuration descriptor from the configuration RAM and transfers it to
the host. Requests for a configuration descriptor returns all of the descriptors associated with a given
configuration including interface, endpoint, and class-specific descriptors. This request fails if the
configuration RAM has not been initialized. No user notification is provided.
The optional requests for string descriptors are not handled automatically by the request processor.
GET
The string descriptors must be stored in external memory and not the configuration RAM.
Returns the selected alternate setting for the specified interface. No user notification is provided.
SYNC
MCF5272 ColdFire
_
DESCRIPTOR
_
FRAME
and the optional
requests for string descriptors are passed to the user as a vendor specific request.
Table 12-1. USB Device Requests
®
Integrated Microprocessor User’s Manual, Rev. 3
USB Request Processor Action
SET
_
DESCRIPTOR
SET
_
request. The
CONFIGURATION
SYNC
request. No user
Universal Serial Bus (USB)
_
FRAME
request
12-5
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