參數(shù)資料
型號: MC68EC060RC50
廠商: Freescale Semiconductor
文件頁數(shù): 3/128頁
文件大小: 0K
描述: IC MPU 32BIT 50MHZ 206-PGA
標準包裝: 10
系列: M680x0
處理器類型: M680x0 32-位
速度: 50MHz
電壓: 3.3V
安裝類型: 通孔
封裝/外殼: 206-BEPGA
供應商設備封裝: 206-PGA(47.25x47.25)
包裝: 托盤
MOTOROLA
M68060 USER’S MANUAL
5-1
SECTION 5
CACHES
The MC68060 contains two independent 8-Kbyte, on-chip caches which can be accessed
simultaneously for instruction and operand data. The caches improve system performance
by providing low latency data to the MC68060 instruction and data pipes. This decouples
processor performance from system memory performance and increases bus availability for
alternate bus masters.
As shown in Figure 5-1, the instruction and data caches are contained in the instruction and
data memory units. The appropriate memory unit independently services instruction
prefetch from the instruction fetch unit (IFU) and data requests from the operand pipe unit
(OPU). The memory units translate the logical address in parallel with indexing into the
cache. If the translated (physical) address matches one of the cache entries, the access hits
in the cache. For a read operation, the memory unit supplies the data to the IPU instruction
buffer or the OPU, and for a write operation, the memory unit updates the cache. If the
access does not match one of the cache entries (misses in the cache) or a write access must
be written through to memory, the appropriate memory unit sends an external bus request
to the bus controller. The bus controller then reads or writes the required data. In the event
that the bus controller receives an external bus request from both memory units, the bus
controller invokes its priority scheme to choose between IPU and OPU requests.
To maintain cache coherency, the MC68060 provides automatic snoop-invalidation when it
is not the bus master. Unlike the MC68040, the MC68060 cannot not source or sink cache
data during alternate bus master accesses.
The MC68060 implements a bus snooper that maintains cache coherency by monitoring an
alternate bus master access to memory and invalidating matching cache lines during the
alternate bus master access. The MC68060 requires that memory pages shared with other
bus masters be cache inhibited or marked cachable writethrough (instead of copyback).
When a processor writes to writethrough pages, external memory is always updated through
an external bus access after updating the cache, keeping memory and cached data consis-
tent.
5.1 CACHE OPERATION
Both four-way set-associative caches have 128 sets of four 16-byte lines. Each set in both
caches has a tag (consisting of the upper 21 bits of the physical address), status information,
and four long words (128 bits) of data. The status information for the instruction cache is a
single valid bit for the line. The status information for the data cache is a valid bit and a dirty
相關PDF資料
PDF描述
IDT71V65803S133BGG8 IC SRAM 9MBIT 133MHZ 119BGA
MPC8270ZUUPEA IC MPU POWERQUICC II 480-TBGA
IDT71V65803S133BG8 IC SRAM 9MBIT 133MHZ 119BGA
MPC860PCZQ66D4 IC MPU PWRQUICC 66MHZ 357-PBGA
IDT71V65803S100BGG8 IC SRAM 9MBIT 100MHZ 119BGA
相關代理商/技術參數(shù)
參數(shù)描述
MC68EC060RC66 功能描述:微處理器 - MPU 32B W/ CACHE RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68EC060RC75 功能描述:微處理器 - MPU 32B W/ CACHE RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68EC060ZU50 功能描述:IC MPU 68K 50MHZ 304-TBGA RoHS:否 類別:集成電路 (IC) >> 嵌入式 - 微處理器 系列:M680x0 標準包裝:1 系列:MPC85xx 處理器類型:32-位 MPC85xx PowerQUICC III 特點:- 速度:1.2GHz 電壓:1.1V 安裝類型:表面貼裝 封裝/外殼:783-BBGA,F(xiàn)CBGA 供應商設備封裝:783-FCPBGA(29x29) 包裝:托盤
MC68EC060ZU66 功能描述:微處理器 - MPU 32B W/ CACHE RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68EC060ZU75 功能描述:微處理器 - MPU 32B W/ CACHE RoHS:否 制造商:Atmel 處理器系列:SAMA5D31 核心:ARM Cortex A5 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:536 MHz 程序存儲器大小:32 KB 數(shù)據(jù) RAM 大小:128 KB 接口類型:CAN, Ethernet, LIN, SPI,TWI, UART, USB 工作電源電壓:1.8 V to 3.3 V 最大工作溫度:+ 85 C 安裝風格:SMD/SMT 封裝 / 箱體:FBGA-324