H838024 datasheet(195/697 Pages) RENESAS

Part #	H838024

Description	Renesas 8-Bit Single-Chip Microcomputer Super Low Power Series

PDF	697 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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195 / 697 page

Section 6 ROM

Rev. 7.00 Mar 10, 2005 page 153 of 652

REJ09B0042-0700

6.4

Reliability of Programmed Data

A highly effective way to improve data retention characteristics is to bake the programmed chips

at 150°C, then screen them for data errors. This procedure quickly eliminates chips with PROM

memory cells prone to early failure.

Figure 6.6 shows the recommended screening procedure.

Program chip and verify

programmed data

Bake chip for 24 to 48 hours at

125

°C to 150°C with power off

Read and check program

Install

Figure 6.6 Recommended Screening Procedure

If a series of programming errors occurs while the same PROM programmer is in use, 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.

H838024 Datasheet(PDF) 195 Page - Renesas Technology Corp