LPC3240 datasheet(29/73 Pages) NXP

29 / 73 page

LPC3220_30_40_50_1

Preliminary data sheet

Rev. 01 — 6 February 2009

29 of 73

NXP Semiconductors

LPC3220/30/40/50

16/32-bit ARM microcontrollers

condition is indicated via status registers. An interrupt is also generated if enabled. The

DMA controller when enabled transfers data between the endpoint buffer and the USB

RAM.

Features

• Fully compliant with USB 2.0 full-speed speciﬁcation.

• Supports 32 physical (16 logical) endpoints.

• Supports control, bulk, interrupt and isochronous endpoints.

• Scalable realization of endpoints at run time.

• Endpoint maximum packet size selection (up to USB maximum speciﬁcation) by

software at run time.

• RAM message buffer size based on endpoint realization and maximum packet size.

• Supports bus-powered capability with low suspend current.

• Supports DMA transfer on all non-control endpoints.

• One duplex DMA channel serves all endpoints.

• Allows dynamic switching between CPU controlled and DMA modes.

• Double buffer implementation for bulk and isochronous endpoints.

7.6.3.2

USB host controller

The host controller enables data exchange with various USB devices attached to the bus.

It consists of register interface, serial interface engine and DMA controller. The register

interface complies to the

OHCI speciﬁcation.

Features

• OHCI compliant.

• OHCI speciﬁes the operation and interface of the USB host controller and software

driver.

• The host controller has four USB states visible to the software driver:

– USBOperational: Process lists and generate SOF tokens.

– USBReset: Forces reset signaling on the bus, SOF disabled.

– USBSuspend: Monitor USB for wake-up activity.

– USBResume: Forces resume signaling on the bus.

• HCCA register points to interrupt and isochronous descriptors list.

• ControlHeadED and BulkHeadED registers point to control and bulk descriptors list.

7.6.3.3

USB OTG controller

USB OTG (On-The-Go) is a supplement to the

USB 2.0 speciﬁcation that augments the

capability of existing mobile devices and USB peripherals by adding host functionality for

connection to USB peripherals.

Features

• Fully compliant with On-The-Go supplement to the USB Speciﬁcation 2.0 Revision

1.0.

LPC3240 Datasheet(PDF) 29 Page - NXP Semiconductors

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