AN845 PRODUCTION PROGRAMMING OF EM35X CHIPS

2020-11-18

This document describes the flash programming interface of EM35x chips, and is intended for production programming of chips on a manufacturing line. The description assumes all chips being programmed are new from the distributor and have never been programmed before, but may still contain test code in the MFB. The process described in this document is intended to program a final, fixed image and is not intended for use during application development. This document also assumes the connection between the chip being programmed and the programmer is reliable and error free.
Production programming of flash on EM35x chips is accomplished using flashloader firmware. The programmer communicates with the chip using the Serial Wire and JTAG Interface (SWJ). The SWJ allows the programmer to read from any address and write to any RAM or register address. The SWJ is used to install, execute, and communicate with the flashloader firmware in RAM. The flashloader performs all of the flash manipulation operations using a simple set of commands that operate on shared memory buffers. This application note focuses on the use of the flashloader firmware to manipulate flash contents, how the flashloader should be used in a production programming environment, and the issues surrounding flashloader use including program image, gang programming, and serialization.

Silicon Labs

EM35X

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CHIPS

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Application note & Design Guide

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2017/07/27

Rev 0.2

AN845

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