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| 型號(hào)： | MC68EC060RC50 |
| 廠商： | Freescale Semiconductor |
| 文件頁(yè)數(shù)： | 60/128頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC MPU 32BIT 50MHZ 206-PGA |
| 標(biāo)準(zhǔn)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(yīng)商設(shè)備封裝： | 206-PGA（47.25x47.25） |
| 包裝： | 托盤 |
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Introduction
MOTOROLA
M68060 USER’S MANUAL
1-13
user distinction in the M68000 family architecture allows for the writing of application soft-
ware that executes in the user mode and migrates to the MC68060 from any M68000 family
platform without modification. The supervisor programming model contains the control fea-
tures that system designers need to modify system software when porting to a new design.
For example, only the supervisor software can read or write to the TTRs of the MC68060.
The existence of the TTRs does not affect the programming resources of user application
programs.
The user programming model includes eight data registers, seven address registers, and a
stack pointer register. The address registers and stack pointer can be used as base address
registers or software stack pointers, and any of the 16 registers can be used as index reg-
isters. Two control registers are available in the user mode—the program counter (PC),
which usually contains the address of the instruction that the MC68060 is executing, and the
lower byte of the SR, which is accessible as the condition code register (CCR). The CCR
contains the condition codes that reflect the results of a previous operation and can be used
for conditional instruction execution in a program.
The supervisor programming model includes the upper byte of the SR, which contains oper-
ation control information. The vector base register (VBR) contains the base address of the
exception vector table, which is used in exception processing. The source function code
(SFC) and destination function code (DFC) registers contain 3-bit function codes. These
function codes can be considered extensions to the 32-bit logical address. The processor
automatically generates function codes to select address spaces for data and program
accesses in the user and supervisor modes. Some instructions use the alternate function
code registers to specify the function codes for various operations.
The processor configuration register (PCR) contains bits which control the internal pipelines
of the MC68060 design.
The bus control register (BUSCR) is used to control software emulation of locked bus trans-
actions.
The cache control register (CACR) controls enabling of the on-chip instruction and data
caches of the MC68060. The supervisor root pointer (SRP) and user root pointer (URP) reg-
isters point to the root of the address translation table tree to be used for supervisor and user
mode accesses.
The translation control register (TCR) enables logical-to-physical address translation and
selects either 4- or 8-Kbyte page sizes. There are four TTRs, two for instruction accesses
and two for data accesses. These registers allow portions of the logical address space to be
transparently mapped and accessed without the use of resident descriptors in an ATC.
The user programming model can also access the entire floating-point programming model.
The eight 80-bit floating-point data registers are analogous to the integer data registers. A
32-bit floating-point control register (FPCR) contains an exception enable byte that enables
and disables traps for each class of floating-point exceptions and a mode byte that sets the
user-selectable rounding and precision modes. A floating-point status register (FPSR) con-
tains a condition code byte, quotient byte, exception status byte, and accrued exception
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| 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(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 |
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