7480 datasheet(195/337 Pages) RENESAS

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7480 Group and 7481 Group User's Manual

1-178

1.20 Built-in PROM Version

HARDWARE

1.20.4 Notes on Usage

Pay attention to the following notes when the built-in PROM version is used.

(1)

All Products of Built-in PROM Version Products

Programming into Built-in PROM

• A high voltage is used to program into the PROM. Be careful not to apply an overvoltage to pins,

especially when power is turned on.

• The use of a dedicated programming adapter (Note) is recommended when the PROM programming

is performed, so that general-purpose PROM programmers are available for programming.

Reading from Built-in PROM

The use of a dedicated programming adapter (Note) is recommended when the PROM contents are

read, so that general-purpose PROM programmers are available for reading.

Note: Refer to Data Book DEVELOPMENT SUPPORT TOOLS FOR MICROCOMPUTERS for the

dedicated programming adapter.

(2)

One Time PROM Version

The one time PROM version (a blank product) is neither tested nor screened since Mitsubishi’s

assembly process. To improve reliability after programming, it is suggested that these products are

used only after programming and verification, according to the procedure shown in Figure 1.20.4, is

completed.

Figure 1.20.4 Programming and Verification of One Time PROM Version

Function check in target device

(Note 1)

(Note 2)

Screening

(at 150°C for 40 hours)

Programming with PROM Programmer

Verifying with PROM

Programmer

Notes 1: Exposure to a high temperature of be within 100 hours.

The M37480E8SP/FP, M37481E8SP/FP and M37481E8SS

are not available for automotive controls because they are not

extended operating temperature versions, which are used in

automotive controls. The M37481E8SS is for the program-evaluation

only. It cannot be as the final product as well as in automotive

controls.

2: Implementation evaluation will reject those damaged by

surge during handling.

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