參數(shù)資料
型號(hào)： SPEAR300-2
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 333 MHz, RISC MICROCONTROLLER, PBGA289
封裝： 15 X 15 MM, 1.70 MM HEIGHT, 0.80 MM PITCH, ROHS COMPLIANT, LFBGA-289
文件頁(yè)數(shù)： 5/83頁(yè)
文件大?。?/td> 1027K
代理商： SPEAR300-2
SPEAr300
Architecture overview
Doc ID 16324 Rev 2
13/83
Figure 3.
Clock generator overview
The multi clock generator block, takes a reference signal (which is usually delivered by the
PLL), generates all clocks for the IPs of SPEAr300 according to dedicated programmable
registers.
Each PLL uses an oscillator input of 24 MHz to generate a clock signal at a frequency
corresponding to the highest of the group. This is the reference signal used by the multi
clock generator block to obtain all the other required clocks for the group. Its main feature is
electromagnetic interference reduction capability.
The user can set up the PLL in order to modulate the VCO with a triangular wave. The
resulting signal has a spectrum (and power) spread over a small programmable range of
frequencies centered on F0 (the VCO frequency), obtaining minimum electromagnetic
emissions. This method replaces all the other traditional methods of EMI reduction, such as
filtering, ferrite beads, chokes, adding power layers and ground planes to PCBs, metal
shielding and so on. This gives the customer appreciable cost savings.
In sleep mode the SPEAr300 runs with the PLL disabled so the available frequency is 24
MHz or a sub-multiple (/2, /4, /8).
2.2.2
Power saving system mode control
Using three mode control bits, the system controller switch the SPEAr300 to any one of four
different modes: DOZE, SLEEP, SLOW and NORMAL.
●
SLEEP mode: In this mode the system clocks, HCLK and CPU_CLK, are disabled and
the System Controller clock is driven by a low speed oscillator (nominally 32768 Hz).
When either a FIQ or an IRQ interrupt is generated (through the VIC) the system enters
PLL1
DIV 2
PLL2
PLL3
DIV 4
HCLK
CPU_CLK
PCLK
DDR_CLK
CLK12MHZ
CLK30MHZ
CLK48MHZ
83 MHz
333 MHz
166 MHz
OSC
RTC
CLK32MHZ
32.768 kHz
24 MHz
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SPEAR310-2 功能描述:微處理器 - MPU MPU ARM926 Cortex 8-ch DMA 32KB Rom 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
SPEAR320 制造商:STMICROELECTRONICS 制造商全稱:STMicroelectronics 功能描述:Embedded MPU with ARM926 core, optimized for factory automation and consumer applications
SPEAR320-2 功能描述:微處理器 - MPU MPU ARM926 Cortex 8-ch DMA 32KB Rom 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
SPEAR320S-2 制造商:STMicroelectronics 功能描述:SPEAR 32BIT EMBEDDED MICROPROCESSOR ARM926EJ-S (UP TO 333 M - Bulk 制造商:STMicroelectronics 功能描述:SPEAR320 Series 333 MHz 8 kB RAM ARM926 Core Embedded Microprocessor - LFBGA-289
SPEAR600-2 功能描述:微處理器 - MPU MPU ARM926 Cortex 8-ch DMA 32KB Rom 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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