D7564A Datasheet - NEC

D7564A UPD7564A

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 performs efficient dispersion processing of a system as a sub-CPU for the 75X serie.

D7564A Features

* 47 types of instructions (Subset of µPD7500H SET B)

* Instruction cycle Ceramic oscillation : 2.86 µs (in operation at 700 kHz, 5 V)

* Program memory (ROM) capacity: 1024 × 8 bits

* Data memory (RAM) capacity: 64 × 4 bits

* Test source: One external source a

D7564A_NEC.pdf