参数资料
型号: MB9AF312NPMC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP100
封装: 0.50 MM PITCH, PLASTIC, LQFP-100
文件页数: 40/114页
文件大小: 1357K
代理商: MB9AF312NPMC
31
ATmega48PA/88PA/168PA [DATASHEET]
9223F–AVR–04/14
When this clock source is selected, start-up times are determined by the SUT fuses as shown in Table 9-14.
9.8
External Clock
To drive the device from an external clock source, XTAL1 should be driven as shown in Figure 9-4. To run the device on an
external clock, the CKSEL fuses must be programmed to “0000” (see Table 9-15).
Figure 9-4. External Clock Drive Configuration
When this clock source is selected, start-up times are determined by the SUT fuses as shown in Table 9-16.
When applying an external clock, it is required to avoid sudden changes in the applied clock frequency to ensure stable
operation of the MCU. A variation in frequency of more than 2% from one clock cycle to the next can lead to unpredictable
behavior. If changes of more than 2% is required, ensure that the MCU is kept in reset during the changes.
Note that the system clock prescaler can be used to implement run-time changes of the internal clock frequency while still
ensuring stable operation. Refer to Section 9.11 “System Clock Prescaler” on page 32 for details.
Table 9-14. Start-up Times for the 128kHz Internal Oscillator
Power Conditions
Start-up Time from Power-down and
Power-save
Additional Delay from Reset
SUT1...0
BOD enabled
6CK
14CK(1)
00
Fast rising power
6CK
14CK + 4ms
01
Slowly rising power
6CK
14CK + 64ms
10
Reserved
11
Note:
1.
If the RSTDISBL fuse is programmed, this start-up time will be increased to
14CK + 4.1ms to ensure programming mode can be entered.
Table 9-15. Crystal Oscillator Clock Frequency
Frequency
CKSEL3...0
0 - 16MHz
0000
Table 9-16. Start-up Times for the External Clock Selection
Power Conditions
Start-up Time from Power-down and
Power-save
Additional Delay from Reset
(VCC = 5.0V)
SUT1...0
BOD enabled
6CK
14CK
00
Fast rising power
6CK
14CK + 4.1ms
01
Slowly rising power
6CK
14CK + 65ms
10
Reserved
11
XTAL2
XTAL1
GND
PB7
EXTERNAL
CLOCK
SIGNAL
相关PDF资料
PDF描述
MB9AF315NPF 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP100
MSM65P514-JS 8-BIT, OTPROM, 12 MHz, MICROCONTROLLER, PQCC68
MSM67P620-JS 16-BIT, OTPROM, 10 MHz, MICROCONTROLLER, PQCC68
MSM80C154-RS 8-BIT, 12 MHz, MICROCONTROLLER, PDIP40
MSM83C154-RS 8-BIT, MROM, 12 MHz, MICROCONTROLLER, PDIP40
相关代理商/技术参数
参数描述
MB9AF314LAPMC1-G-JNE2 制造商:FUJITSU 功能描述:
MB9AF314LAPMC-G-JNE2 制造商:Fujitsu 功能描述:Bulk
MB9AF314LAQN-G-AVE2 功能描述:ARM? Cortex?-M3 FM3 MB9A310A Microcontroller IC 32-Bit 40MHz 256KB (256K x 8) FLASH 64-QFN Exposed Pad (9x9) 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,I2C,LIN,UART/USART,USB 外设:DMA,LVD,POR,PWM,WDT I/O 数:51 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 9x12b 振荡器类型:内部 工作温度:-40°C ~ 105°C(TA) 封装/外壳:64-VFQFN 裸露焊盘 供应商器件封装:64-QFN 裸露焊盘(9x9) 标准包装:260
MB9AF314LPMC1-ESE1 制造商:FUJITSU 功能描述:
MB9AF314LPMC1-GE1 制造商:FUJITSU 功能描述: