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LPC802 Arkusz danych(PDF) 26 Page - NXP Semiconductors

Numer części LPC802
Szczegółowy opis  32-bit ARM Cortex-M0 microcontroller
PDF  83 Pages
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Producent  NXP [NXP Semiconductors]
Strona internetowa  http://www.nxp.com
Logo NXP - NXP Semiconductors

LPC802 Arkusz danych(HTML) 26 Page - NXP Semiconductors

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LPC802
All information provided in this document is subject to legal disclaimers.
© NXP Semiconductors N.V. 2018. All rights reserved.
Product data sheet
Rev. 1.6 — 27 April 2018
26 of 83
NXP Semiconductors
LPC802
32-bit ARM Cortex-M0+ microcontroller
9.21 CRC engine
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.
9.21.1 Features
• Supports three common polynomials CRC-CCITT, CRC-16, and CRC-32.
– CRC-CCITT: x16 + x12 + x5 + 1
– CRC-16: x16 + x15 + x2 + 1
– CRC-32: x32 + x26 + x23 + x22 + x16 + x12 + x11 + x10 + x8 + x7 + x5 + x4 + x2 + x + 1
• 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).



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