7630 datasheet(167/238 Pages) RENESAS

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2-101

7630 Group User’s Manual

APPLICATION

2.11 Built-in PROM version

In contrast with the mask ROM version, a microcomputer incorporating a programmable ROM is called

built-in PROM version.

There are two types of built-in PROM version as shown below.

q One Time PROM version

Writing to the built-in PROM can be performed only once.

Neither erase nor rewrite operation is

enabled.

q Built-in EPROM version

The built-in EPROM version is a programmable microcomputer with a window and can perform write,

erase, and rewrite operations.

The built-in PROM version has the EPROM mode for writing to the built-in PROM in addition to the same

functions as those of the mask ROM version.

For an outline of performance and a functional block diagram of the built-in PROM version, refer to “1.

Hardware”.

2.11.1 Product expansion

The 7630 group supports the built-in PROM versions shown in Table 2.11.1.

Table 2.11.1 7630 group’s built-in PROM version supporting products

Product name

(P)ROM size

RAM size

I/O Ports

Package

Remarks

(bytes)

M37630E4T-XXXFP

I/O ports: 35

44P6N-A

One Time PROM version

M37630E4FP

16252

512

Input ports: 1

One Time PROM version (blank)

M37630E4FS

80D0

EPROM version

7630 Datasheet(PDF) 167 Page - Renesas Technology Corp