UPD78F4938A View Datasheet(PDF) - NEC => Renesas Technology

Part Name

Description

Manufacturer

UPD78F4938A

16-BIT SINGLE-CHIP MICROCONTROLLER

NEC => Renesas Technology 

µPD78F4938A

1. DIFFERENCES AMONG PRODUCTS IN µPD784938A SUBSERIES

The only difference between the µPD784935A, 784936A, 784937A, and 784938A is the internal memory capacity.

The µPD78F4938A has a 256 KB flash memory in the place of the mask ROM of the above products. Table 1-

1 shows the differences between these products.

Table 1-1. Differences Among Products in µPD784938A Subseries

Item

Part Number

Internal ROM

Internal RAM

Regulator

Electrical specifications

Internal memory size

switching registerNote

IC pin

VPP pin

µPD784935A

µPD784936A

µPD784937A

96 KB

128 KB

192 KB

Mask ROM

5120 bytes

6656 bytes

8192 bytes

Provided

Refer to the data sheet of each product.

None

Provided

None

µPD784938A

256 KB

10496 bytes

µPD78F4938A

Flash memory

None

Provided

None

Provided

Note The internal flash memory capacity and internal RAM capacity can be changed by using the internal memory

size switching register (IMS).

Caution There are differences in noise immunity and noise radiation between the flash memory and mask

ROM versions. When pre-producing an application set with the flash memory version and then

mass-producing it with the mask ROM version, be sure to conduct sufficient evaluations for the

commercial samples (not engineering samples) of the mask ROM version.

6

Data Sheet U14118EJ1V0DS

Share Link: