UPD75104A Datasheet (NEC) - 4-BIT SINGLE-CHIP MICROCOMPUTER

UPD75104A, 4-BIT SINGLE-CHIP MICROCOMPUTER

µPD75108A is a 4-bit single-chip CMOS microcomputer having a data processing capability comparable to that of an 8-bit microcomputer.

Operating at high speeds, the microcomputer allows data to be manipulated in units of 1, 4, or 8 bits.

In addition, various bit manipulation instructions are provided

UPD75104A Features

* Internal memory

* Program memory (ROM) : 8064 × 8 bits (µ PD75108A) : 4096 × 8 bits (µ PD75104A)

* Data memory (RAM) : 512 × 4 bits ( µPD75108A) : 320 × 4 bits ( µPD75104A)

* Architecture “75X” rivaling 8-bit microcomputers

* 43 systematically organized inst