參數(shù)資料
型號(hào): MC68EC060RC66
廠商: Freescale Semiconductor
文件頁數(shù): 110/128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
MOTOROLA
M68060 USER’S MANUAL
4-13
4.2.2.3 DESCRIPTOR FIELD DEFINITIONS. The field definitions for the table- and page-
level descriptors are listed in alphabetical order:
CM—Cache Mode
This field selects the cache mode and accesses serialization as follows:
00 = Cachable, Writethrough
01 = Cachable, Copyback
10 = Cache-Inhibited, Precise exception model
11 = Cache-Inhibited, Imprecise exception model
Section 5 Caches provides detailed information on caching modes.
Descriptor Address
This 30-bit field, which contains the physical address of a page descriptor, is only used in
indirect descriptors.
G—Global
When this bit is set, it indicates the entry is global which gives the user the option of group-
ing entries as global or nonglobal for use when PFLUSHing the ATC, and has no other
meaning. PFLUSH instruction variants that specify nonglobal entries do not invalidate glo-
bal entries, even when all other selection criteria are satisfied. If these PFLUSH variants
are not used, then system software can use this bit.
M—Modified
This bit identifies a page which has been written to by the processor. The MC68060 sets
the M-bit in the corresponding page descriptor before a write operation to a page for which
the M-bit is clear, except for write-protect or supervisor violations in which case the M-bit
is not set. The read portion of a locked read-modify-write access is considered a write for
updating purposes. The MC68060 never clears this bit.
PDT—Page Descriptor Type
This field identifies the descriptor as an invalid descriptor, a page descriptor for a resident
page, or an indirect pointer to another page descriptor.
00 = Invalid
This code indicates that the descriptor is invalid. An invalid descriptor can repre-
sent a nonresident page or a logical address range that is out of bounds. All other
bits in the descriptor are ignored. When an invalid descriptor is encountered, an
ATC entry is not created.
01 or 11 = Resident
These codes indicate that the page is resident.
10 = Indirect
This code indicates that the descriptor is an indirect descriptor. Bits 31–2 contain
the physical address of the page descriptor. This encoding is invalid for a page
descriptor pointed to by an indirect descriptor (that is, only one level of indirection
is allowed).
相關(guān)PDF資料
PDF描述
MC7447AVU1420LB IC MPU RISC 32BIT 360-BGA
MC8640DTVU1000HE IC MPU DUAL CORE E600 1023FCCBGA
FH40-60S-0.5SV CONN FPC/FFC 60POS .5MM VERT SMD
MC8640DTHX1000HE IC DUAL CORE PROCESSOR 1023-CBGA
MC7457RX1000NC IC MPU RISC 32BIT 483FCCBGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
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(shí)鐘頻率:536 MHz 程序存儲(chǔ)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
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(biāo)準(zhǔn)包裝:1 系列:MPC85xx 處理器類型:32-位 MPC85xx PowerQUICC III 特點(diǎn):- 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(yīng)商設(shè)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(shí)鐘頻率:536 MHz 程序存儲(chǔ)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
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(shí)鐘頻率:536 MHz 程序存儲(chǔ)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
MC68EN302 制造商:MOTOROLA 制造商全稱:Motorola, Inc 功能描述:Integrated Multiprotocol Processor with Ethernet