OM13008,598 NXP Semiconductors, OM13008,598 Datasheet - Page 348

• Manufacturer Part Number: OM13008,598
• Description: BOARD LPC XPRESSO LPC122X
• Manufacturer: NXP Semiconductors
• Series: LPCXpressor

Specifications of OM13008,598

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-6642; OM13008

22.1 How to read this chapter
22.2 Introduction
22.3 Features
UM10441
User manual
The CRC engine is available on all LPC122x parts.
The Cyclic Redundancy Check (CRC) generator with programmable polynomial settings
supports several CRC standards commonly used. To save system power and bus
bandwidth, the CRC engine supports DMA transfers in addition to software PIO
operations using the CPU.
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UM10441
Chapter 22: LPC122x CRC engine
Rev. 1.1 — 10 March 2011
Supports three common polynomials CRC-CCITT, CRC-16, and CRC-32.
– CRC-CCITT: x
– CRC-16: x
– CRC-32: x
Bit order reverse and 1’s complement programmable setting for input data and CRC
sum.
Programmable seed number setting.
Supports CPU PIO or DMA back-to-back transfer.
Accept any size of data width per write: 8, 16 or 32-bit.
– 8-bit write: 1-cycle operation
– 16-bit write: 2-cycle operation (8-bit x 2-cycle)
– 32-bit write: 4-cycle operation (8-bit x 4-cycle)
All information provided in this document is subject to legal disclaimers.
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© NXP B.V. 2011. All rights reserved.
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