参数资料
型号: MB9AF314MPMC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP80
封装: 0.50 MM PITCH, PLASTIC, LQFP-80
文件页数: 32/114页
文件大小: 1357K
代理商: MB9AF314MPMC
ATmega48PA/88PA/168PA [DATASHEET]
9223F–AVR–04/14
24
9.
System Clock and Clock Options
9.1
Clock Systems and their Distribution
Figure 9-1 presents the principal clock systems in the AVR and their distribution. All of the clocks need not be active at a
given time. In order to reduce power consumption, the clocks to modules not being used can be halted by using different
sleep modes, as described in Section 10. “Power Management and Sleep Modes” on page 35. The clock systems are
detailed below.
Figure 9-1. Clock Distribution
9.1.1
CPU Clock – clkCPU
The CPU clock is routed to parts of the system concerned with operation of the AVR core. Examples of such modules are
the general purpose register file, the status register and the data memory holding the stack pointer. Halting the CPU clock
inhibits the core from performing general operations and calculations.
9.1.2
I/O Clock – clkI/O
The I/O clock is used by the majority of the I/O modules, like Timer/Counters, SPI, and USART. The I/O clock is also used by
the external interrupt module, but note that start condition detection in the USI module is carried out asynchronously when
clkI/O is halted, TWI address recognition in all sleep modes.
Note:
Note that if a level triggered interrupt is used for wake-up from power-down, the required level must be held
long enough for the MCU to complete the wake-up to trigger the level interrupt. If the level disappears before
the end of the start-up time, the MCU will still wake up, but no interrupt will be generated. The start-up time is
defined by the SUT and CKSEL fuses as described in
Asynchronous
Timer/Counter
Flash and
EEPROM
Timer/Counter
Oscillator
Calibrated RC
Oscillator
Low-frequency
Crystal Oscillator
Crystal
Oscillator
Watchdog
Oscillator
System Clock
Prescaler
General I/O
Modules
AVR Clock
Control Unit
ADC
External Clock
CPU Core
Source clock
Watchdog clock
RAM
Reset Logic
Watchdog Timer
clk
I/O
clk
ASY
clk
CPU
clk
ADC
clk
FLASH
Clock
Multiplexer
相关PDF资料
PDF描述
MB89537APV4 8-BIT, MROM, 12.5 MHz, MICROCONTROLLER, PBCC64
M38062E6GP 8-BIT, OTPROM, 8 MHz, MICROCONTROLLER, PQFP80
MSM80C31F-GS-VIK 8-BIT, 12 MHz, MICROCONTROLLER, PQFP44
MSM83C154-1GS-K 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44
MC68HC11A8CFU1 8-BIT, MROM, 3 MHz, MICROCONTROLLER, PQFP64
相关代理商/技术参数
参数描述
MB9AF314MPMC-G-JNE1 制造商:FUJITSU 功能描述:MCU 32BIT CORTEX-M3 FM3 80LQFP
MB9AF314NABGL-GE1 制造商:FUJITSU 功能描述:
MB9AF314NAPF-G-JNE1 功能描述:IC MCU 32BIT 256KB FLASH 100QFP 制造商:cypress semiconductor corp 系列:FM3 MB9A310A 包装:托盘 零件状态:在售 核心处理器:ARM? Cortex?-M3 核心尺寸:32-位 速度:40MHz 连接性:CSIO,EBI/EMI,I2C,LIN,UART/USART,USB 外设:DMA,LVD,POR,PWM,WDT I/O 数:83 程序存储容量:256KB(256K x 8) 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:32K x 8 电压 - 电源(Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 16x12b 振荡器类型:内部 工作温度:-40°C ~ 105°C(TA) 封装/外壳:100-BQFP 供应商器件封装:100-PQFP(20x14) 标准包装:66
MB9AF314NAPMC-G-JNE2 功能描述:ARM? Cortex?-M3 FM3 MB9A310A Microcontroller IC 32-Bit 40MHz 256KB (256K x 8) FLASH 100-LQFP (14x14) 制造商:cypress semiconductor corp 系列:FM3 MB9A310A 包装:托盘 零件状态:有效 核心处理器:ARM? Cortex?-M3 核心尺寸:32-位 速度:40MHz 连接性:CSIO,EBI/EMI,I2C,LIN,UART/USART,USB 外设:DMA,LVD,POR,PWM,WDT I/O 数:83 程序存储容量:256KB(256K x 8) 程序存储器类型:闪存 EEPROM 容量:- RAM 容量:32K x 8 电压 - 电源(Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 16x12b 振荡器类型:内部 工作温度:-40°C ~ 105°C(TA) 封装/外壳:100-LQFP 供应商器件封装:100-LQFP(14x14) 标准包装:90
MB9AF314NBGL-GE1 制造商:FUJITSU 功能描述: 制造商:FUJITSU 功能描述:MCU 32BIT CORTEX-M3 FM3 112BGA 制造商:FUJITSU 功能描述:MCU, 32BIT, CORTEX-M3, FM3, 112BGA 制造商:FUJITSU 功能描述:MCU, 32BIT, CORTEX-M3, FM3, 112BGA, Controller Family/Series:ARM Cortex-M3, Core 制造商:FUJITSU 功能描述:MCU, 32BIT, CORTEX-M3, FM3, 112BGA, Controller Family/Series:ARM Cortex-M3, Core Size:32bit, No. of I/O's:83, Supply Voltage Min:2.7V, Supply Voltage Max:5.5V, Digital IC Case Style:BGA, No. of Pins:112, Program Memory Size:256KB, , RoHS Compliant: Yes