MCF5272VF66 Freescale, MCF5272VF66 Datasheet - Page 259

• Manufacturer Part Number: MCF5272VF66
• Manufacturer: Freescale

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

Chapter 12
Universal Serial Bus (USB)
This chapter provides an overview of the USB module of the MCF5272, including detailed operation
information and the USB programming model. Connection examples and circuit board layout
considerations are also provided.
The USB Specification, Revision 1.1 is a recommended supplement to this chapter. It can be downloaded
from http://www.usb.org. Chapter 2 of this specification, Terms and Abbreviations, provides definitions of
many of the terms found here.
12.1
The universal serial bus (USB) is an industry-standard extension to the PC architecture. The USB
controller on the MCF5272 supports device mode data communication between itself and a USB host
device, typically a PC. One host and up to 127 attached peripherals share USB bandwidth through a
host-scheduled, token-based protocol. The USB uses a tiered star topology with a hub at the center of each
star, as shown in
connector and a peripheral B connector.
The USB cables contain four wires, two for data and two for power. The USB full-speed bit rate is
12 Mbps. A limited-capability, low-speed mode is also defined at 1.5 Mbps.
The MCF5272 includes the following features:
Freescale Semiconductor
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Supports full-speed 12-Mbps USB devices and low-speed 1.5-Mbps devices
Full compliance with the Universal Serial Bus Specification, Revision 1.1
Automatic processing of USB standard device requests:
GET
SET
Supports either internal or external USB transceiver
Programmable 512-byte receive and 512-byte transmit FIFO buffers
USB device controller with protocol control and administration for up to eight endpoints, 16
interfaces, and 16 configurations
Programmable endpoint types with support for up to eight control, interrupt, bulk, or isochronous
endpoints
Independent interrupts for each endpoint
Introduction
_
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FEATURE
DESCRIPTOR
Unless otherwise stated, all mention of the USB specification refers to
revision 1.1.
Figure
, and
MCF5272 ColdFire
12-1. Each wire segment is a point-to-point connection between the host A
,
GET
SET
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INTERFACE
INTERFACE
®
Integrated Microprocessor User’s Manual, Rev. 3
,
GET
_
STATUS
NOTE
,
SET
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ADDRESS
CLEAR
_
,
FEATURE
SET
_
CONFIGURATION
,
GET
_
CONFIGURATION
,
12-1
,