參數(shù)資料
型號: MC68LC060RC66
廠商: Freescale Semiconductor
文件頁數(shù): 113/128頁
文件大?。?/td> 0K
描述: IC MPU 32BIT 66MHZ 206-PGA
標(biāo)準(zhǔn)包裝: 10
系列: M680x0
處理器類型: M680x0 32-位
速度: 66MHz
電壓: 3.3V
安裝類型: 通孔
封裝/外殼: 206-BEPGA
供應(yīng)商設(shè)備封裝: 206-PGA(47.25x47.25)
包裝: 托盤
Memory Management Unit
4-16
M68060 USER’S MANUAL
MOTOROLA
4.2.4 Variations in Translation Table Structure
Several aspects of the MMU translation table structure are software configurable, allowing
the system designer flexibility to optimize the performance of the MMUs for a particular sys-
tem. The following paragraphs discuss the variations of the translation table structure.
4.2.4.1 INDIRECT ACTION. The MC68060 provides the ability to replace an entry in a page
table with a pointer to an alternate entry. The indirection capability allows multiple tasks to
share a physical page while maintaining only a single set of history information for the page
(i.e., the modified indication is maintained only in the single descriptor). The indirection
capability also allows the page frame to appear at arbitrarily different addresses in the logical
address spaces of each task.
Using the indirection capability, single entries or entire tables can be shared between multi-
ple tasks. Figure 4-13 illustrates two tasks sharing a page using indirect descriptors.
Figure 4-13. Translation Table Using Indirect Descriptors
ROOT-LEVEL
TABLES
POINTER-LEVEL
TABLES
PAGE-LEVEL
TABLES
0 11101 10010 10100 001 X X XXXXX XXXXX X
ROOT INDEX
POINTER INDEX
PAGE INDEX
PAGE OFFSET
LOGICAL ADDRESS
$76543210 =
$3B
$15
$01
TABLE ENTRY # =
TABLE $3B
TABLE $15
TABLE $00
TABLE $7F
TABLE $1F
TABLE $00
$3B
$EC
$54
$04
ADDRESS OFFSET =
$00001800
$00003000
$80000010
$15
$01
ROOT POINTER
TASK A
TASK B
ROOT POINTER
FRAME ADDRESS
相關(guān)PDF資料
PDF描述
MC68LC060ZU75 IC MPU 32BIT 68K 75MHZ 304-TBGA
MC68M360ZQ25VLR2 IC MPU QUICC 25MHZ 357-PBGA
MC68MH360CZQ25L IC MPU QUICC 25MHZ 357-PBGA
MC68P11E1CFNE2R IC MCU 8BIT 52-PLCC
MC68SEC000AA16R2 IC MPU 32BIT 16 MHZ 64-QFP
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MC68LC060RC75 功能描述:微處理器 - MPU 32B W/ CACHE MMU 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(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68LC060ZU50 功能描述:微處理器 - MPU 32B W/ CACHE MMU 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(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68LC060ZU66 功能描述:微處理器 - MPU 32B W/ CACHE MMU 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(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68LC060ZU75 功能描述:微處理器 - MPU 32B W/ CACHE MMU 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(fēng)格:SMD/SMT 封裝 / 箱體:FBGA-324
MC68LC302AF16CT 功能描述:數(shù)字信號處理器和控制器 - DSP, DSC 68K INTGR COM PROC, DMA RoHS:否 制造商:Microchip Technology 核心:dsPIC 數(shù)據(jù)總線寬度:16 bit 程序存儲器大小:16 KB 數(shù)據(jù) RAM 大小:2 KB 最大時鐘頻率:40 MHz 可編程輸入/輸出端數(shù)量:35 定時器數(shù)量:3 設(shè)備每秒兆指令數(shù):50 MIPs 工作電源電壓:3.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TQFP-44 安裝風(fēng)格:SMD/SMT