12-bit

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Processors
1-bit	4-bit	8-bit	12-bit	16-bit	18-bit	24-bit	31-bit	32-bit	36-bit	48-bit	60-bit	64-bit	128-bit
Applications
		8-bit		16-bit				32-bit				64-bit
Data Sizes
bit nibble octet byte
halfword word dword qword
IEEE floating-point standard
Single precision floating-point format (32-bit) Double precision floating-point format (64-bit) Quadruple precision floating-point format (128-bit)

In computer architecture, 12-bit integers, memory addresses, or other data units are those that are at most 12 bits (1.5 octets) wide. Also, 12-bit CPU and ALU architectures are those that are based on registers, address buses, or data buses of that size.

Possibly the best-known 12-bit CPU is the PDP-8 and its relatives, produced in various incarnations from August 1963 to mid-1990. Many ADCs (analog to digital converters) have a 12-bit resolution. Some PIC microcontrollers use a 12-bit word size.

12 binary digits have 4096 (10000 octal, 1000 hexadecimal) unique combinations.

References

DIGITAL Computing Timeline: 12-bit architecture

CPU technologies

Architecture

ISA : CISC · EDGE · EPIC · MISC · OISC · RISC · VLIW · NISC · ZISC · Harvard architecture · von Neumann architecture · 4-bit · 8-bit · 12-bit · 16-bit · 18-bit · 24-bit · 31-bit · 32-bit · 36-bit · 48-bit · 60-bit · 64-bit · 128-bit · Comparison of CPU architectures

Parallelism

Pipeline	Instruction pipelining · In-order & out-of-order execution · Register renaming · Speculative execution · Hazards

Level	Bit · Instruction · Superscalar · Data · Task

Threads	Multithreading · Simultaneous multithreading · Hyperthreading · Superthreading

Flynn's taxonomy	SISD · SIMD · MISD · MIMD

Types

Digital signal processor · Microcontroller · System-on-a-chip · Vector processor

Components

Arithmetic logic unit (ALU) · Barrel shifter · Floating-point unit (FPU) · Back-side bus · Multiplexer · Demultiplexer · Registers · Memory management unit (MMU) · Translation lookaside buffer (TLB) · Cache · Register file · Microcode · Control unit · Clock rate

Power management

APM · ACPI · Dynamic frequency scaling · Dynamic voltage scaling · Clock gating

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An analoue voltage is converted to digital with an analogue-digital converter The resolution is 12bit What is the maximum number of voltage levels after conversion?

A digital-ramp adc has a clock frequency of 1.5 mhz and vt equals 0.1 mv the dac has fs output equals 14.99 v and a 12-bit input va equals 5.595 v determine the step size of the dac?

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