The µPD7564A is a 4-bit single-chip microcomputer with a small number of ports in a small package, which is of low-order models, µPD7554 and 7564 sub-series in the µPD7500 series. With an on-chip serial interface, it per- forms efficient dispersion processing of a system as a sub-CPU for the 75X series or 78k series. The µPD7564A has outputs to directly drive a triac and LEDs and allows selection among many types of input/ output circuits using their respective mask options, sharply reducing the number of external circuits required.
This document is a datasheet for the NEC uPD7564A and 7564A(A), which are 4-bit single-chip microcomputers designed for use as sub-CPUs in systems like printers, VCRs, and automotive equipment. The devices feature an on-chip serial interface, a built-in ceramic oscillator, and low power dissipation, operating on a single power supply between 2.7V and 6.0V.
| Program memory capacity | 1024 x 8 bits |
|---|---|
| Data memory capacity | 64 x 4 bits |
| Supply voltage range | 2.7 to 6.0 V |
Yes, it has a built-in ceramic oscillator for the system clock.
The total output current of all pins is 100 mA.
The single power supply voltage ranges from 2.7 to 6.0 V.
The program memory capacity is 1024 x 8 bits.