mcf5272 Freescale Semiconductor, Inc, mcf5272 Datasheet - Page 67

• Manufacturer Part Number: mcf5272
• Description: Mcf5272 Coldfire Integrated Microprocessor User
• Manufacturer: Freescale Semiconductor, Inc

MOTOROLA
The QSPI has the following features:
1.4.4 Universal Serial Bus (USB) Module
The USB controller on the MCF5272 supports device mode data communications with a
USB host (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. Each wire segment is a point-to-point
connection between the host connector and a peripheral connector.
• Programmable queue to support up to 16 transfers without user intervention
• Supports transfer sizes of 8 to 16 bits in 1-bit increments
• Four peripheral chip-select lines for control of up to 15 devices
• Baud rates from 129.4 Kbps to 33 Mbps at 66 MHz.
• Programmable delays before and after transfers
• Programmable clock phase and polarity
• Supports wrap-around mode for continuous transfers
Chapter 1. Overview
MCF5272-Specific Features
1-9