lpc2377 NXP Semiconductors, lpc2377 Datasheet - Page 22

• Manufacturer Part Number: lpc2377
• Description: Single-chip 16-bit/32-bit Microcontroller; 512 Kb ?ash With Isp/iap, Ethernet, Usb 2.0, Can, And 10-bit Adc/dac
• Manufacturer: NXP Semiconductors

NXP Semiconductors
LPC2377_78_4
Product data sheet
7.11.1.1 Features
7.11.1 USB device controller
7.11 USB interface (LPC2378 only)
7.12 CAN controller and acceptance filters (LPC2378 only)
The Universal Serial Bus (USB) is a 4-wire bus that supports communication between a
host and a number (127 maximum) of peripherals. The host controller allocates the USB
bandwidth to attached devices through a token based protocol. The bus supports hot
plugging, unplugging and dynamic configuration of the devices. All transactions are
initiated by the host controller.
The two sets of pins needed by a USB device are named V
USB_UP_LED1, USB_CONNECT1, and USB_D+2, USB_D 2, USB_UP_LED2, and
USB_CONNECT2 respectively. At any given time only one of these two sets can be active
and used by the application.
The device controller enables 12 Mbit/s data exchange with a USB host controller. It
consists of register interface, serial interface engine, endpoint buffer memory, and the
DMA controller. The serial interface engine decodes the USB data stream and writes data
to the appropriate end point buffer memory. The status of a completed USB transfer or
error 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.
The Controller Area Network (CAN) is a serial communications protocol which efficiently
supports distributed real-time control with a very high level of security. Its domain of
application ranges from high-speed networks to low cost multiplex wiring.
The CAN block is intended to support multiple CAN buses simultaneously, allowing the
device to be used as a gateway, switch, or router among a number of CAN buses in
industrial or automotive applications.
Each CAN controller has a register structure similar to the NXP SJA1000 and the PeliCAN
Library block, but the 8-bit registers of those devices have been combined in 32-bit words
to allow simultaneous access in the ARM environment. The main operational difference is
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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 LPC2377/78 can enter one of the reduced
power modes and wake up on a USB activity.
Supports DMA transfers with the DMA RAM of 8 kB on all non-control endpoints.
Allows dynamic switching between CPU-controlled and DMA modes.
Double buffer implementation for Bulk and Isochronous endpoints.
Rev. 04 — 19 November 2008
Single-chip 16-bit/32-bit microcontroller
BUS
, USB_D+1, USB_D 1,
LPC2377/78
© NXP B.V. 2008. All rights reserved.
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