3 April, 2000
Reading
- Sections 7.1-7.4
- Sections 7.6-7.7
- Section 7.10
- Section 7.11-12 quickly
- Sections 9.1-9.4
Using RAM
- 256 x 8 RAM
- Read protocol
- Assume CE is low, R is high, and OE is high
- Turn off all other bus writers
- Enter address
- Clear OE (to low) -- RAM drives bus
- Set OE (to high) -- RAM releases bus
- Write protocol
- Assume CE is low, R is high, and OE is high
- Enter address and data
- Clear R (to low) -- RAM loads bus
- Set R (to high) -- RAM complete load
Building large RAM
Another look at RAM timing
Open the textbook to page 289.
Data paths
Open the textbook to page 304.