EA-OEM-204 Embedded Artists, EA-OEM-204 Datasheet - Page 36

MCU, MPU & DSP Development Tools LPC2478-16 OEM BRD OEM BASE BRD W/TOUCH

EA-OEM-204

Manufacturer Part Number
EA-OEM-204
Description
MCU, MPU & DSP Development Tools LPC2478-16 OEM BRD OEM BASE BRD W/TOUCH
Manufacturer
Embedded Artists
Datasheets

Specifications of EA-OEM-204

Processor To Be Evaluated
LPC2478
Data Bus Width
16 bit
Interface Type
RS-232, Ethernet, USB, I2C, SPI, UART
Core
ARM7TDMI-S
Dimensions
240 mm x 150 mm
Maximum Operating Temperature
+ 85 C
Operating Supply Voltage
3.3 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
NXP Semiconductors
LPC2478
Product data sheet
7.12.1.1 Features
7.12.2.1 Features
7.12.1 USB device controller
7.12.2 USB host controller
7.12 USB interface
The Universal Serial Bus (USB) is a 4-wire bus that supports communication between a
host and one or more (up to 127) peripherals. The host controller allocates the USB
bandwidth to attached devices through a token-based protocol. The bus supports hot
plugging and dynamic configuration of the devices. All transactions are initiated by the
host controller.
The LPC2478 USB interface includes a device, host, and OTG controller. Details on
typical USB interfacing solutions can be found in
solutions” on page 75
The device controller enables 12 Mbit/s data exchange with a USB host controller. It
consists of a register interface, serial interface engine, endpoint buffer memory, and a
DMA controller. The serial interface engine decodes the USB data stream and writes data
to the appropriate endpoint buffer. The status of a completed USB transfer or error
condition is indicated via status registers. An interrupt is also generated if enabled. When
enabled, the DMA controller transfers data between the endpoint buffer and the USB
RAM.
The host controller enables full- and low-speed data exchange with USB devices attached
to the bus. It consists of register interface, serial interface engine and DMA controller. The
register interface complies with the Open Host Controller Interface (OHCI) specification.
Fully compliant with USB 2.0 Specification (full speed).
Supports 32 physical (16 logical) endpoints with a 4 kB endpoint buffer RAM.
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.
Supports SoftConnect and GoodLink features.
While USB is in the Suspend mode, the LPC2478 can enter one of the reduced power
modes and wake up on USB activity.
Supports DMA transfers with the DMA RAM of 16 kB on all non-control endpoints.
Allows dynamic switching between CPU-controlled and DMA modes.
Double buffer implementation for Bulk and Isochronous endpoints.
OHCI compliant
Two downstream ports
Supports per-port power switching
All information provided in this document is subject to legal disclaimers.
Rev. 2 — 29 September 2010
Single-chip 16-bit/32-bit microcontroller
Section 14.2 “Suggested USB interface
LPC2478
© NXP B.V. 2010. All rights reserved.
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