What Is Storage, Type Of Storage, Ram, Rom, Dram, Sram,Memory Packaging.
what is storage, type of storage, RAM, ROM, DRAM, SRAM,memory packaging.
NOTE 3
◄ STORAGE ►
◄ Storage are farther divided into ii parts. ►
1) Primary / internal memory
2) Secondary / external memory
1) Primary / internal retention type.
⇨ ROM (Read Only Memory)
◄ Difference betwixt ROM too RAM. ►
ROM | RAM |
Contents inwards this retention cannot live change. | Content inwards this retention change. |
It is non-volatile memory. | It is volatile memory. |
When the arrangement is plough of the contents inwards ROM retention volition stay equally it is. | When the arrangement is plough of the content is RAM retention volition delete or erase. |
◄ TYPE OF ROM ►
i. PROM (Programmable Read Only Memory): - it is basically a blank ROM chip which tin live written to but once. To write inwards this retention static electricity is used.
ii. EPROM (Erasable Programmable Read Only Memory): - This retention is only similar PROM. Only the deviation is that inwards this ultra purplish ray are used to erase the data. Entire EPROM contents are going to live erase.
iii. EEPROM (Electrically Erasable Programmable Read Only Memory): - In this hole contents does non erase. Only a specific porson is going to live erase alongside the tending of fine intensity calorie-free beam.
◄TYPE OF RAM ►
i. SRAM (Static Random-Access Memory)
ii. DRAM (Dynamic Random-Access Memory)
◄ Difference betwixt SRAM too DRAM. ►
SRAM | DRAM |
Required six to 8 transistor. | Required iii to iv transistor. |
Memory cannot live deleted or refreshed spell running the program. | Memory tin live deleted or refreshed spell running the program. |
Data stored inwards flip-flop level. | Data stored equally a accuse inwards the capacitor. |
Requires to a greater extent than space. | Requires less space. |
It is to a greater extent than expensive. | It is chipper. |
Consume to a greater extent than power. | Consume less power. |
Require less fourth dimension to access data. | Require to a greater extent than fourth dimension to access data. |
It has less storage capacitor. | It has to a greater extent than storage capacitor. |
Very fast. | Slow than SRAM. |
 |
| DRAM type |
◄ Memory measurement. ►
0,1 | bit | |
4 bits | Nibble | |
8 bits | 1 Byte | |
16 bits | 1 word | |
1024 Byte | 1 KB | Kilo Byte |
1024 KB | 1 MB | Mega Byte |
1024 MB | 1 GB | Giga Byte |
1024 GB | 1 TB | Tera Byte |
1024 TB | 1 PB | Penta Byte |
◄DDR RAM Voltage too their pins. ►
RAM | VOLTAGE (V) | PINS |
DDR 1 | 2.5 V - 2.6 V | 184 |
DDR 2 | 1.8 V | 240 |
DDR 3 | 1.5 V | 240 |
DDR 4 | 1.2 V | 288 |
◄ Memory packaging type. ►
I. SIMM (Single in-line retention module).
II. DIMM (Double in-line retention module).
III. RIMM (Rambus inwards business retention module).
Basic for comparison. | SIMM | DIMM |
Basic | Pins acquaint inwards either side are connected. | In DIMM pins are independent. |
Channel | 32 bits. | 64 bits. |
Power consumption | 5 volts. | 3.3 volts. |
Application | 486 CPU too early on Pentium reckoner move SIMM. | Modern Pentium reckoner are enabled alongside DIMM modules. |
Pin configuration | 30 – 72 pins | 162 – 184 pins, now a days nosotros are besides using 240, 288 pins. |
· RIMM: - RIMM correspond Rambus in-line retention module. It is used solely alongside RDAM too mainly for Intel P4 motherboard.
TODAY TOPIC
In this article nosotros had learned almost storage type, what is ROM too RAM, type of ROM = PROM, EPROM, EEPROM. Then type of RAM = SRAM, DRAM. Then type of DRAM. Then nosotros had learned retention measurement. And DDR RAM voltage too their pins. Then retention packaging type = SIMM, DIMM, RIMM.
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Next topic what is cache memory? Cache retention level. And what is cache hitting too cache hit.
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