參數(shù)資料
型號： STR912FAW32H6T
廠商： 意法半導(dǎo)體
英文描述： ARM966E-S⑩ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA
中文描述： ARM966E -虜⑩16/32位閃存微控制器與以太網(wǎng)，USB，加拿大，交流電機(jī)控制，4個定時器，模數(shù)轉(zhuǎn)換器，RTC和DMA的
文件頁數(shù)： 13/99頁
文件大小： 979K
代理商： STR912FAW32H6T
STR91xFAx32 STR91xFAx42 STR91xFAx44
Functional overview
13/99
3.4.2
Branch Cache (BC)
When instruction addresses are not sequential, such as a program branch situation, the
PFQ would have to flush and reload which would cause the CPU to stall if no BC were
present. Before reloading, the PFQ checks the BC to see if it contains the desired target
branch address. The BC contains up to fifteen of the most recently taken branch addresses
and the first eight instructions associated with each of these branches. This check is
extremely fast, checking all fifteen BC entries simultaneously for a branch address match
(cache hit). If there is a hit, the BC rapidly supplies the instruction and reduces the CPU
stall. This gives the PFQ time to start pre-fetching again while the CPU consumes these
eight instructions from the BC. The advantage here is that program loops (very common
with embedded control applications) run very fast if the address of the loops are contained
in the BC.
In addition, there is a 16th branch cache entry that is dedicated to the Vectored Interrupt
Controller (VIC) to further reduce interrupt latency by eliminating the stall latency typically
imposed by fetching the instruction that reads the interrupt vector address from the VIC.
3.4.3
Management of literals
Typical ARM architecture and compilers do not place literals (data constants) sequentially in
Flash memory with the instructions that use them, but instead the literals are placed at some
other address which looks like a program branch from the PFQ’s point of view. The
STR91xFA implementation of the ARM966E-S core has special circuitry to prevent flushing
the PFQ when literals are encountered in program flow to keep performance at a maximum.
相關(guān)PDF資料
PDF描述
STR912FAW32X6 ARM966E-S⑩ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA
STR912FAW32X6T ARM966E-S⑩ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA
STR912FAW34H6T ARM966E-S⑩ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA
STR912FAW34X6T ARM966E-S⑩ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA
STR912FAW42 ARM966E-S⑩ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
STR912FAW32X6 功能描述:ARM微控制器 - MCU ARM7TDMI 32-Bit Flash Based MCU RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT
STR912FAW32X6T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:ARM966E-S⑩ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA
STR912FAW34H6T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:ARM966E-S⑩ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA
STR912FAW34X6 功能描述:ARM微控制器 - MCU ARM966E S 16/32B Flash MCU RoHS:否 制造商:STMicroelectronics 核心:ARM Cortex M4F 處理器系列:STM32F373xx 數(shù)據(jù)總線寬度:32 bit 最大時鐘頻率:72 MHz 程序存儲器大小:256 KB 數(shù)據(jù) RAM 大小:32 KB 片上 ADC:Yes 工作電源電壓:1.65 V to 3.6 V, 2 V to 3.6 V, 2.2 V to 3.6 V 工作溫度范圍:- 40 C to + 85 C 封裝 / 箱體:LQFP-48 安裝風(fēng)格:SMD/SMT
STR912FAW34X6T 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:ARM966E-S⑩ 16/32-Bit Flash MCU with Ethernet, USB, CAN, AC motor control, 4 timers, ADC, RTC, DMA
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