UPD78P048A datasheet(13/73 Pages) RENESAS

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µPD78P048A

Data Sheet U10611EJ2V1DS

DIFFERENCES BETWEEN

µPD78P048A AND MASK ROM PRODUCTS

The

µPD78P048A is a single-chip microcontroller with an on-chip one-time writable PROM or with an on-chip

EPROM which has program write, erasure and rewrite capability.

It is possible to make all the functions except for PROM specification, and mask option, to the same as those of

mask ROM products by setting the memory size switching register (IMS) and the internal expansion RAM size

switching register (IXS).

Differences between the

µPD78P048A and mask ROM products (µPD78042F, 78043F, 78044F, and 78045F) are

shown in Table 1-1.

Table 1-1. Differences between

µPD78P048A and Mask ROM Products

Item

µPD78P048A

Mask ROM Products

Internal ROM structure

One-time PROM/EPROM

Mask ROM

Internal ROM capacity

60K bytes

µPD78042F: 16K bytes

µPD78043F: 24K bytes

µPD78044F: 32K bytes

µPD78045F: 40K bytes

Internal high-speed RAM capacity

1024K bytes

µPD78042F: 512 bytes

µPD78043F: 512 bytes

µPD78044F: 1024 bytes

µPD78045F: 1024 bytes

Changes of internal ROM and internal high-speed

AvailableNotes 1

Not available

RAM capacities by memory size switching register

(IMS)

Change of internal expansion RAM capacity by

AvailableNotes 2

Not available

internal expansion RAM size switching register

(IXS)

IC pin

Yes

VPP pin

Yes

Mask option with internal pull-down resistor for pins

Yes

P30-P37, P106, P107, P110-P117, and P120-P127.

Mask option with internal pull-up resistor for pins

Yes

P70-P74.

Electrical characteristics

Refer to the Data Sheet for each product.

Notes 1. The internal PROM becomes to 60K bytes and the internal high-speed RAM becomes 1024 bytes by the

RESET input.

2. The internal expansion RAM becomes to 1024 bytes by the RESET input.

Caution Noise resistance and noise radiation are different in PROM version and mask ROM versions. If using

a mask ROM version instead of the PROM version for processes between prototype development

and full production, be sure to fully evaluate the CS of the mask ROM version (not ES).

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