RL78 Family RL78 Hardware CRC functions
Many applications need to check the integrity of a code image or data communication stream by using a CRC function to verify data errors have not occurred. Most RL78 MCUs have a built-in Hardware CRC function that can be used for this purpose.
Users often want to check for run-time integrity of code images or data communication packets by using the built-in RL78 CRC functions in hardware. Specific examples include:
● When checking existing Code Flash image for errors on each MCU Power-ON RESET sequence
● When checking new Code flash blocks after they are received during a Boot loader sequence
● When checking for communication channel errors –especially when transmitted over an RF link, such as Wi-Fi or Blue-Tooth network.
The RL78has two built-in CRC Hardware calculation functions; (1) High Speed CRC, and (2) General Purpose CRC, also referred to as “Low-speed” CRC function. It is also sometimes desirable to emulate the RL78 Hardware CRC functions in Software, to perform a run-time cross-check, or if implementing CRC calculations in another MCU system not having RL78 Hardware CRC function.
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RL78 、 G10 、 RSKRL78G13 、 R5F100LE |
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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Jan 13,2017 |
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Rev.1.00 |
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R01AN3530EU0100 |
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1.5 MB |
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