SH7041A datasheet(718/923 Pages) RENESAS

Part #	SH7041A

Description	Renesas 32-Bit Single-Chip RISC Microprocessor SuperH RISC engine Family/SH7040 Series(CPU Core SH-2)

PDF	923 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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5. Terminate the writing if a write malfunction occurs in consecutive addresses. In such cases,

check for problems in the EPROM writer and/or socket adapter. There are some cases where

write/verify will not be possible if using an EPROM writer with a high impedance power

supply system.

6. Use a EPROM writer that conforms to the socket adapter supported by this LSI.

21.3.4

Post-Write Reliability

High temperature biasing (or burn-in) of devices is recommended after writing in order to improve

the data retention characteristics. High temperature biasing is a method of screening that

eliminates parts with faulty initial data retention by on-chip PROM memory cells within a short

period of time. Figure 21.8 shows the flow from the on-chip PROM programming including

screening to the installation of the device on a board.

Program write/verify

Installation on board

Figure 21.5 (flowchart)

Unpowered high-

temperature bias

(125–150

°C, 24–48 hours)

Data read out and verify

CC = 5.0 V)

Figure 21.8 Screening Flow

If there are any abnormalities in program write/verify or program read-out verification after high

temperature biasing, please contact a Renesas Technology technical representative.

SH7041A Datasheet(PDF) 718 Page - Renesas Technology Corp