4570 Datasheet, PDF (59/69 Pages) Renesas Technology Corp – SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER

MITSUBISHI MICROCOMPUTERS
4570 Group
SINGLE-CHIP 4-BIT CMOS MICROCOMPUTER
(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
ΠA 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
Address
000016
1 1 1 D4 D3 D2 D1 D0
1FFF16
Low-order 5 bits
400016 _{1 1 1 D4 D3 D2 D1 D0}
5FFF16
High-order 5 bits
7FFF16
The shaded area can be used only for M34570ED.
Set “FF16” to the shaded area.
Fig. 36 PROM memory map
Writing with PROM programmer
Screening (Leave at 150 °C for 40 hours) (Note)
Verify test with PROM programmer
Function test in target device
Note: Since the screening temperature is higher
than storage temperature, never expose the
microcomputer to 150 °C exceeding 100
hours.
Fig. 37 Flow of writing and test of the product shipped in
blank
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