4570 datasheet(59/69 Pages) RENESAS

59 / 69 page

MITSUBISHI MICROCOMPUTERS

4570 Group

SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

Fig. 36 PROM memory map

Fig. 37 Flow of writing and test of the product shipped in

blank

(1) PROM mode

The built-in PROM version has a PROM mode in addition to

a normal operation mode. The PROM mode is used to write

to and read from the built-in PROM.

In the PROM mode, the programming adapter can be used

with a general-purpose PROM programmer to write to or read

from the built-in PROM as if it were M5M27C256K.

Programming adapter is listed in Table 17. Contact addresses

at the end of this book for the appropriate PROM programmer.

• Writing and reading of built-in PROM

Programming voltage is 12.5 V. Write the program in the

PROM of the built-in PROM version as shown in Figure

36.

(2) Notes on handling

A high-voltage is used for writing. Take care that

overvoltage is not applied. Take care especially at turning

on the power.

For the One Time PROM version Mitsubishi Electric corp.

does not perform PROM writing test and screening in the

assembly process and following processes. In order to

improve reliability after writing, performing writing and test

according to the flow shown in Figure 37 before using is

recommended.

Table 17 Programming adapter

Microcomputer

M34570E8FP, M34570EDFP

Programming adapter

PCA7425

Writing with PROM programmer

Screening (Leave at 150 °C for 40 hours) (Note)

Verify test with PROM programmer

Function test in target device

Since the screening temperature is higher

than storage temperature, never expose the

microcomputer to 150 °C exceeding 100

hours.

Note:

Address

000016

1FFF16

400016

5FFF16

7FFF16

High-order 5 bits

Low-order 5 bits

The shaded area can be used only for M34570ED.

Set “FF16” to the shaded area.

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