UPD78P083 datasheet(13/56 Pages) NEC

13 / 56 page

µPD78P083

Parameter

µPD78P083

Mask ROM Versions

ROM type

One-time PROM/EPROM

Mask ROM

ROM capacity

24 Kbytes

µPD78081 : 8 Kbytes

µPD78082 : 16 Kbytes

Internal high-speed RAM capacity

512 bytes

µPD78081 : 256 bytes

µPD78082 : 384 bytes

Internal ROM and internal high-speed

Can be changed Note

Can not be changed

RAM capacity change by internal

memory size switching register

IC pin

Yes

VPP pin

Yes

Electrical specifications

Refer to a data sheet of each product

DIFFERENCES BETWEEN THE

µPD78P083 AND MASK ROM VERSIONS

The

µPD78P083 is a single-chip microcontroller with an on-chip one-time PROM or with an on-chip EPROM which has

program write, erasure and rewrite capability.

Setting the internal memory size switching register (IMS) makes the functions except the PROM specification identical

to the mask ROM versions, that is, the

µPD78081 and µPD78082.

Differences between the

µPD78P083 and mask ROM versions are shown in Table 1-1.

Table 1-1. Differences between the

µPD78P083 and Mask ROM Versions

Note

The internal PROM becomes 24 Kbytes and the internal expansion RAM becomes 512 bytes by the RESET input.

UPD78P083 데이터시트(PDF) 13 Page - NEC