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參數(shù)資料
| 型號： | MPC7457 |
| 廠商： | 飛思卡爾半導(dǎo)體(中國)有限公司 |
| 英文描述： | RISC Microprocessor Hardware Specifications |
| 中文描述： | RISC微處理器硬件規(guī)格 |
| 文件頁數(shù)： | 3/68頁 |
| 文件大小： | 1755K |
| 代理商： | MPC7457 |
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MPC7457 RISC Microprocessor Hardware Specifications, Rev. 5
Freescale Semiconductor
3
Features
The memory storage subsystem supports the MPX bus protocol and a subset of the 60x bus protocol to main memory
and other system resources. The L3 interface supports 1, 2, or 4 Mbytes of external SRAM for L3 cache and/or
private memory data. For systems implementing 4 Mbytes of SRAM, a maximum of 2 Mbytes may be used as cache;
the remaining 2 Mbytes must be private memory.
Note that the MPC7457 is a footprint-compatible, drop-in replacement in a MPC7455 application if the core power
supply is 1.3 V.
2
Features
This section summarizes features of the MPC7457 implementation of the PowerPC architecture.
Major features of the MPC7457 are as follows:
High-performance, superscalar microprocessor
— As many as four instructions can be fetched from the instruction cache at a time.
— As many as three instructions can be dispatched to the issue queues at a time.
— As many as 12 instructions can be in the instruction queue (IQ).
— As many as 16 instructions can be at some stage of execution simultaneously.
— Single-cycle execution for most instructions
— One instruction per clock cycle throughput for most instructions
— Seven-stage pipeline control
Eleven independent execution units and three register files
— Branch processing unit (BPU) features static and dynamic branch prediction
– 128-entry (32-set, four-way set associative) branch target instruction cache (BTIC), a cache of
branch instructions that have been encountered in branch/loop code sequences. If a target instruction
is in the BTIC, it is fetched into the instruction queue a cycle sooner than it can be made available
from the instruction cache. Typically, a fetch that hits the BTIC provides the first four instructions
in the target stream.
– 2048-entry branch history (BHT) with 2 bits per entry for 4 levels of prediction—not-taken, strongly
not-taken, taken, and strongly taken
– Up to three outstanding speculative branches
– Branch instructions that do not update the count register (CTR) or link register (LR) are often
removed from the instruction stream.
– Eight-entry link register stack to predict the target address of Branch Conditional to Link Register
(
bclr
) instructions
— Four integer units (IUs) that share 32 GPRs for integer operands
– Three identical IUs (IU1a, IU1b, and IU1c) can execute all integer instructions except multiply,
divide, and move to/from special-purpose register instructions
– IU2 executes miscellaneous instructions including the CR logical operations, integer multiplication
and division instructions, and move to/from special-purpose register instructions
— Five-stage FPU and a 32-entry FPR file
– Fully IEEE 754-1985 compliant FPU for both single- and double-precision operations
– Supports non-IEEE mode for time-critical operations
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| MPC7457EC | RISC Microprocessor Hardware Specifications |
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| MPC8241TZQ266C | Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PT06; Number of Contacts:30; Connector Shell Size:18; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight |
| MPC8241TZQ266D | Circular Connector; MIL SPEC:MIL-C-26482, Series I, Solder; Body Material:Aluminum; Series:PT06; No. of Contacts:30; Connector Shell Size:18; Connecting Termination:Solder; Circular Shell Style:Straight Plug; Body Style:Straight |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MPC7457EC | 制造商:FREESCALE 制造商全稱:Freescale Semiconductor, Inc 功能描述:RISC Microprocessor Hardware Specifications |
| MPC745BPX300LE | 功能描述:微處理器 - MPU 255 PBGAREV2.8105C 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 |
| MPC745BPX350LE | 功能描述:微處理器 - MPU 255 PBGAREV2.8105C 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 |
| MPC745BVT300LE | 功能描述:微處理器 - MPU GF REV2.8105C 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 |
| MPC745BVT350LE | 功能描述:微處理器 - MPU GF REV2.8105C 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 |
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