μPD444
μPD650 tech specs
- Company: NEC
- Type: RAM
The μPD444 was 4-bit RAM made by NEC. It has 1024 nibbles.[1]
Used in
- Roland TB-303[2] (μPD444C ×3)
- Roland TR-606[3] (μPD444C ×2)
- Roland TR-808[4] (μPD444C ×4)
References
- "μPD444" NEC, NEC Electronics USA Inc. Microcomputer Division 1982 Catalogue, 1982, pp. 75—78
- "TB-303 service notes" Roland, Feb 1982
- "TR-606 service notes" Roland, Jan 1982
- "TR-808 service notes" Roland, Jun 1981
Downloads
Documentation
- "μPD444" NEC, NEC Electronics USA Inc. Microcomputer Division 1982 Catalogue, 1982, pp. 75—78
NEC: μPD444 | μPD650 | μPD780 | μPD8048 | μPD8080 | μPD70216
RAM: μPD444