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HD6433636SW Folha de dados(PDF) 131 Page - Renesas Technology Corp

Nome de Peças HD6433636SW
Descrição Electrónicos  8-Bit Microcomputer
PDF  418 Pages
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Fabricante Electrônico  RENESAS [Renesas Technology Corp]
Página de início  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

HD6433636SW Folha de dados(HTML) 131 Page - Renesas Technology Corp

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6.4
Reliability of Programmed Data
A highly effective way of assuring data retention characteristics after programming is to screen the
chips by baking them at a temperature of 150
°C. This quickly eliminates PROM memory cells
causing initial data retention failure.
Figure 6.6 shows a flowchart of this screening procedure.
Install
Write program and verify contents
Bake at high temperature with power off
125
°C to 150°C, 24 hrs to 48 hrs
Read and check program
Figure 6.6 Recommended Screening Procedure
If write errors occur repeatedly while the same PROM programmer is being used, stop
programming and check for problems in the PROM programmer and socket adapter, etc.
Please notify your Hitachi representative of any problems occurring during programming or in
screening after high-temperature baking.



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