H8SSLASH2224 datasheet(850/1071 Pages) RENESAS

Il numero della parte	H8S/2224

Spiegazioni elettronici	16-Bit Single-Chip Microcomputer H8S Family/H8S/2200 Series

PDF	1071 Pages

Scroll/Zoom	100%

Produttore elettronici	RENESAS [Renesas Technology Corp]

Homepage	http://www.renesas.com

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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.

H8S/2224 Scheda tecnica(PDF) 850 Page - Renesas Technology Corp