System Memory Flashcards
1
Q
ROM (Read-Only Memory)
A
Can’t be changed or erased
2
Q
PROM (Programmable Read-Only Memory)
A
Programmable ROM
• Write once
3
Q
EPROM (Eraseable PROM)
A
Write / Erase / Write again
4
Q
EEPROM (Electrically Erasable PROM)
A
Flash memory
5
Q
SRAM (Static RAM)
A
Maintains data without constant refreshing
• Very fast, very expensive
• Often used in processor caches
6
Q
DRAM (Dynamic RAM)
A
Requires constant refreshing to maintain
dataWrite once
7
Q
SDRAM (Synchronous Dynamic RAM)
A
Synchronous with the common system
clock
8
Q
EEPROM (Electrically Erasable PROM)
A
Flash memory
9
Q
DDR (Double Data Rate SDRAM)
A
Twice the data rate of SDRAM
10
Q
DDR2 (Double Data Rate 2 SDRAM)
A
2x the bus clock multiplier of DDR
11
Q
DDR3 (Double Data Rate 3 SDRAM)
A
4x the bus clock multipler of DDR
