Description
The µPD4564441, 4564841, 4564163 are high-speed 67,108,864-bit synchronous dynamic random-access memories, organized as 4,194,304 × 4 × 4, 2,097,152 × 8 × 4, 1,048,576 ×16 × 4 (word × bit × bank), respectively.
Features
- Fully Synchronous Dynamic RAM, with all signals referenced to a positive clock edge.
- Pulsed interface.
- Possible to assert random column address in every cycle.
- Quad internal banks controlled by A12 and A13 (Bank Select).
- Byte control (×16) by LDQM and UDQM.
- Programmable Wrap sequence (Sequential / Interleave).
- Programmable burst length (1, 2, 4, 8 and full page).
- Programmable /CAS latency (2 and 3).
- Automatic prech.
UPD4564441-NEC.pdf
