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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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H8S/2225 数据表(PDF) 850 Page - Renesas Technology Corp |
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H8S/2225 数据表(HTML) 850 Page - Renesas Technology Corp |
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850 / 1071 page  Section 22 PROM Rev. 5.00 Aug 08, 2006 page 764 of 982 REJ09B0054-0500 • The size of the PROM is 128 kbytes. Always set addresses within the range H'00000 to H'1FFFF. During programming, write H'FF to unused addresses to avoid verification errors. 22.3.3 Reliability of Programmed Data An effective way to assure the data retention characteristics of the programmed chips is to bake them at 150°C, then screen them for data errors. This procedure quickly eliminates chips with PROM memory cells prone to early failure. Figure 22.6 shows the recommended screening procedure. Mount Programing the chip and verify programed data Bake chip for 24 to 48 hours at 125 °C to 150°C with power off Read and check program Figure 22.6 Recommended Screening Procedure If a series of programming errors occurs while the same PROM programmer is being used, stop programming and check the PROM programmer and socket adapter for defects. Please inform Renesas Technology of any abnormal conditions noted during or after programming or in screening of program data after high-temperature baking. |
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