MC-458CB646 Overview
Description
The MC-458CB646EFB and MC-458CB646PFB are 8,388,608 words by 64 bits synchronous dynamic RAM module on which 4 pieces of 128M SDRAM: µPD45128163 are assembled. This module provides high density and large quantities of memory in a small space without utilizing the surfacemounting technology on the printed circuit board.
Key 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 BA0 and BA1 (Bank Select)
- Programmable burst-length (1, 2, 4, 8 and full page)
- Programmable wrap sequence (sequential / interleave)
- Programmable /CAS latency (2
- Automatic precharge and controlled precharge
- CBR (Auto) refresh and self refresh
- All DQs have 10 Ω ± 10 % of series resistor
