HD6412240 RENESAS [Renesas Technology Corp], HD6412240 Datasheet - Page 584

• Manufacturer Part Number: HD6412240
• Description: Renesas 16-Bit Single-Chip Microcomputer H8S Family / H8S/2200 Series
• Manufacturer: RENESAS [Renesas Technology Corp]

Section 16 ROM
16.5.4
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 cells prone to early failure.
Figure 16.6 shows the recommended screening procedure.
Program chip and verify data
Bake chip for 24 to 48 hours at
125 C to 150 C with power off
Read and check program
Mount
Figure 16.6 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 of any abnormal conditions noted during or after programming or in
screening of program data after high-temperature baking.
Rev.3.00 Mar. 26, 2007 Page 542 of 772
REJ09B0355-0300