Memory array - Revision history

Rice: /* Timing */

2024-06-03T15:17:24Z

Timing

← Older revision		Revision as of 15:17, 3 June 2024
Line 25:		Line 25:

	Memory is the bottleneck of computing speed, almost certainly taking more than 1 clock cycle to run. An ideal memory is fast, cheap, and large capacity. The hierarchy goes from ''cache > main memory > virtual memory''.		Memory is the bottleneck of computing speed, almost certainly taking more than 1 clock cycle to run. An ideal memory is fast, cheap, and large capacity. The hierarchy goes from ''cache > main memory > virtual memory''.

			Check out [[Locality]]

Rice at 15:16, 3 June 2024

2024-06-03T15:16:02Z

← Older revision		Revision as of 15:16, 3 June 2024
Line 21:		Line 21:
	== Merging I/O ==		== Merging I/O ==
	Traditionally computers have an address bus and a data bus, and we sometimes write and sometimes read. Tri-state buffers can be used to do this.		Traditionally computers have an address bus and a data bus, and we sometimes write and sometimes read. Tri-state buffers can be used to do this.

			= Timing =

			Memory is the bottleneck of computing speed, almost certainly taking more than 1 clock cycle to run. An ideal memory is fast, cheap, and large capacity. The hierarchy goes from ''cache > main memory > virtual memory''.

Rice at 19:35, 17 May 2024

2024-05-17T19:35:05Z

← Older revision		Revision as of 19:35, 17 May 2024
Line 1:		Line 1:
			[[Category:Computer Architecture]]

	A '''memory array''' is an element for storing values. It takes in an N-bit address input and spits out an M-bit value output.		A '''memory array''' is an element for storing values. It takes in an N-bit address input and spits out an M-bit value output.

Rice at 15:44, 17 May 2024

2024-05-17T15:44:34Z

← Older revision		Revision as of 15:44, 17 May 2024
Line 16:		Line 16:

	A [[tri-state buffer]] can be used to control the output enable and write enable		A [[tri-state buffer]] can be used to control the output enable and write enable

			== Merging I/O ==
			Traditionally computers have an address bus and a data bus, and we sometimes write and sometimes read. Tri-state buffers can be used to do this.

Rice: /* Construction */

2024-05-17T15:38:04Z

Construction

← Older revision		Revision as of 15:38, 17 May 2024
Line 15:		Line 15:
	You can make a bigger memory array with smaller memory arrays. Just enable the one you want according to the address.		You can make a bigger memory array with smaller memory arrays. Just enable the one you want according to the address.

	A [[tri-state buffer]] can be used to control the output ~~enabling/disabling.~~		A [[tri-state buffer]] can be used to control the output enable and write enable

Rice at 15:06, 17 May 2024

2024-05-17T15:06:01Z

← Older revision		Revision as of 15:06, 17 May 2024
Line 1:		Line 1:
	A '''memory array''' is an element for storing values. It takes in an N-bit address input and spits out an M-bit value output.		A '''memory array''' is an element for storing values. It takes in an N-bit address input and spits out an M-bit value output.

			Depending on the use case ([[Read only memory\|ROM]] or [[Random access memory\|RAM]]), modifications are needed for the circuit, detailed on their respective page.

	= Specification =		= Specification =

Rice: Created page with "A '''memory array''' is an element for storing values. It takes in an N-bit address input and spits out an M-bit value output. = Specification = A memory array can store $2^N$ values, each value having M bits. A memory array is usually specified by the number of elements times the width of each value. For example, if N = 10 and M = 12, we have a 1024x12 memory array. = Construction = Memory arrays are usually ''active lows'' since not gates are convenientl..."

2024-05-15T15:38:18Z

Created page with "A '''memory array''' is an element for storing values. It takes in an N-bit address input and spits out an M-bit value output. = Specification = A memory array can store <math>2^N</math> values, each value having M bits. A memory array is usually specified by the number of elements times the width of each value. For example, if N = 10 and M = 12, we have a 1024x12 memory array. = Construction = Memory arrays are usually ''active lows'' since not gates are convenientl..."

New page

A '''memory array''' is an element for storing values. It takes in an N-bit address input and spits out an M-bit value output.

= Specification =
A memory array can store <math>2^N</math> values, each value having M bits. A memory array is usually specified by the number of elements times the width of each value.

For example, if N = 10 and M = 12, we have a 1024x12 memory array.

= Construction =

Memory arrays are usually ''active lows'' since not gates are conveniently used for merging memory (see section below). Commercially, there may be an active high enabler.

== Merging memory ==
You can make a bigger memory array with smaller memory arrays. Just enable the one you want according to the address.

A [[tri-state buffer]] can be used to control the output enabling/disabling.