Zoë Blade's notebook

μPD650

μPD650 tech specs

The μPD650 was a 4-bit microcontroller by NEC.[1][2]

It has 96 nibbles of RAM, and 2000 bytes of ROM.[1] It supports the extended μCOM-4's full instruction set of 80 instructions.

It's pretty impressive that Roland's engineers squeezed enough functionality out of the μPD650 to make entire digital step sequencers.

Used in

References

  1. "μPD650 / μPD651" NEC, NEC Electronics USA Inc. Microcomputer Division 1982 Catalogue, 1982, pp. 161—162
  2. "TB-303 service notes" Roland, Feb 1982
  3. "TR-606 service notes" Roland, Jan 1982
  4. "TR-808 service notes" Roland, Jun 1981

Downloads

Documentation

Microcontrollers: ATmega328P | TMP80C49P | μPD650 | μPD8048

NEC: μPD444 | μPD650 | μPD780 | μPD8048 | μPD8080 | μPD70216