208 Memory Management Units (MMU) 1

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Part	RoHS	Manufacturer	Peripheral IC Type	Temperature Grade	Terminal Form	No. of Terminals	Package Code	Package Shape	Package Body Material	Surface Mount	Maximum Supply Voltage	No. of Addressable Pages	Address Bus Width	Power Supplies (V)	Package Style (Meter)	Package Equivalence Code	Minimum Supply Voltage	Maximum Operating Temperature	Minimum Operating Temperature	Terminal Finish	Terminal Position	Maximum Seated Height	Width	External Data Bus Width	Maximum Clock Frequency	Technology	Maximum Supply Current	Nominal Supply Voltage	Sub-Category	Bus Compatibility	Terminal Pitch	Maximum Address Translation Time	JESD-30 Code	Qualification	Low Power Mode	JESD-609 Code
L64815QC-25		Broadcom	MEMORY MANAGEMENT UNIT	COMMERCIAL	GULL WING	208	QFP	SQUARE	PLASTIC/EPOXY	YES				5	FLATPACK	QFP208,1.2SQ,20		70 Cel	0 Cel	Tin/Lead (Sn/Pb)	QUAD					CMOS	340 mA	5 V	Memory Management Units		.5 mm		S-PQFP-G208	Not Qualified		e0

Memory Management Units (MMU)

A Memory Management Unit (MMU) is a hardware component that manages the translation of virtual memory addresses to physical memory addresses. The MMU is an essential component of modern computer systems and is responsible for providing a layer of abstraction between the operating system and the physical memory of the system.

The MMU translates virtual memory addresses to physical memory addresses using a page table, which is a data structure that maps virtual memory addresses to physical memory addresses. The page table is stored in memory and is managed by the operating system. When a program requests data from memory, the MMU uses the page table to translate the virtual memory address to a physical memory address.

The MMU also provides memory protection by assigning different access permissions to different memory regions. This allows the operating system to isolate programs from each other and prevent unauthorized access to memory. For example, the MMU can assign read-only access to certain memory regions to prevent programs from modifying critical data.

Another important function of the MMU is memory sharing. The MMU allows multiple programs to share memory regions, which can improve system performance and reduce memory usage. By sharing memory, programs can communicate with each other more efficiently and reduce the need for redundant data storage.