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4508 Datasheet(PDF) 67 Page - Renesas Technology Corp |
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4508 Datasheet(HTML) 67 Page - Renesas Technology Corp |
67 / 142 page 4508 Group Rev.1.02 2006.12.22 page 67 of 140 REJ03B0148-0102 24 QzROM (1) Be careful not to apply overvoltage to MCU. The contents of QzROM may be overwritten because of overvoltage. Take care especially at turning on the power. (2) As for the product shipped in blank, Renesas does not perform the writing test to user ROM area after the assembly process though the QzROM writing test is performed enough before the assembly process. Therefore, a writing error of approx.0.1 % may occur. Moreover, please note the contact of cables and for- eign bodies on a socket, etc. because a writing environment may cause some writing errors. Notes On ROM Code Protect (QzROM product shipped after writing) As for the QzROM product shipped after writing, the ROM code protect is specified according to the ROM option setup data in the mask file which is submitted at ordering. The ROM option setup data in the mask file is “0016” for protect enabled or “FF16” for protect disabled. Note that the mask file which has nothing at the ROM option data or has the data other than “0016” and “FF16” can not be accepted. 25 |
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