UPD78P324LP datasheet(16/80 Pages) NEC

16 / 80 page

µPD78P324, 78P324(A)

DIFFERENCES BETWEEN

µPD78P324 AND µPD78324

The

µPD78P324 is a product in which the µPD78324’s internal mask ROM is replaced by a 32KB PROM.

Therefore, these two products share the same functions, except for differences deriving from the ROM

specifications (for example, Write and Verify, etc.). Their differences are shown in Table 2-1 below.

Table 2-1. Differences between

µPD78P324 and µPD78324

Product Name

Parameter

Internal program memory

(Electric write)

ECC circuit

PROM programming pin

Package

Electrical characteristics

Others

Cautions

1. The PROM product and the mask ROM product differ in their noise resistance volume and noise

reflection. If replacement of the PROM product with the mask ROM product in the process of trial

to mass production is being considered, ensure to make a sufficient evaluation with the CS

product (not ES product) of the mask ROM product.

2. The

µPD78P324(A)/(A1)/(A2) are one-time PROM products only. The differences between the

µPD78P324(A)/(A1)/(A2) and the µPD78324(A)/(A1)/(A2) are the same as those shown in the table

above, except in terms of the EPROM product.

µPD78P324

µPD78324

One-time PROM

EPROM

Mask ROM

(Write enabled only once)

(Rewrite enabled)

With

Without

With

Without

• 68-pin plastic QFJ

• 68-pin ceramic WQFN

• 68-pin plastic QFJ

• 74-pin plastic QFP

• 74-pin ceramic WQFN

• 74-pin plastic QFP

Differ in current consumption, etc.

As they differ in their circuit size and mask layout, their noise resistance volume and

noise reflection differ.

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