Device Family: Stratix® III

Type: Answers

Area: EMIF, Intellectual Property


IP Product: DDR2 SDRAM Controller supporting ALTMEMPHY

How should I determine value of chip bits for Altera High Performance Memory Controller II with multiple chip select?

Description

Altera® External Memory Interface Handbook states that:

For multiple chip selects:

width = chip bits + bank bits + row bits + column bits – 2

 

 

chip bits = chip select - 1  

 

1 chip select = 0 chip bits

2 chip select = 1 chip bits

3 chip select = 2 chip bits

4 chip select = 3 chip bits