参数资料
型号: MC68711E20CFUE4
厂商: Freescale Semiconductor
文件页数: 87/138页
文件大小: 0K
描述: IC MCU 8BIT 64-QFP
标准包装: 84
系列: HC11
核心处理器: HC11
芯体尺寸: 8-位
速度: 4MHz
连通性: SCI,SPI
外围设备: POR,WDT
输入/输出数: 38
程序存储器容量: 20KB(20K x 8)
程序存储器类型: OTP
EEPROM 大小: 512 x 8
RAM 容量: 768 x 8
电压 - 电源 (Vcc/Vdd): 4.5 V ~ 5.5 V
数据转换器: A/D 8x8b
振荡器型: 内部
工作温度: -40°C ~ 85°C
封装/外壳: 64-QFP
包装: 托盘
Resets, Interrupts, and Low-Power Modes
MC68HC711D3 Data Sheet, Rev. 2.1
52
Freescale Semiconductor
When an I bit related interrupt occurs, the I bit is automatically set by hardware after stacking the CCR
byte. The X bit is not affected. When an X bit related interrupt occurs, both the X and the I bit are
automatically set by hardware after stacking the CCR. A return-from-interrupt (RTI) instruction restores
the X and I bits to their preinterrupt request state.
4.3.5 Priority Structure
Interrupts obey a fixed hardware priority circuit to resolve simultaneous requests. However one I bit
related interrupt source may be elevated to the highest I bit priority in the resolution circuit.
Six interrupt sources are not masked by the I bit in the CCR and have these fixed priority relationships:
1.
Reset
2.
Clock monitor failure
3.
COP failure
4.
Illegal opcode
5.
SWI
6.
XIRQ
SWI is actually an instruction and has highest priority, other than resets, in that once the SWI opcode is
fetched, no other interrupt can be honored until the SWI vector has been fetched.
Each of the previous sources is an input to the priority resolution circuit. The highest I bit masked priority
input to the resolution circuit is assigned to be connected to any one of the remaining I bit related interrupt
sources. This assignment is made under the software control of the HPRIO register. To avoid timing
races, the HPRIO register can be written only while the I bit related interrupts are inhibited (I bit of CCR
is logic 1). An interrupt that is assigned to this higher priority position is still subject to masking by any
associated control bits or by the I bit in the CCR. The interrupt vector address is not affected by assigning
a source to the higher priority position.
Figure 4-4, Figure 4-5, and Figure 4-6 illustrate the interrupt process as it relates to normal processing.
Figure 4-4 shows how the CPU begins from a reset, and how interrupt detection relates to normal opcode
fetches. Figure 4-5 is an expansion of a block in Figure 4-4 and shows how interrupt priority is resolved.
Figure 4-6 is an expansion of the SCI interrupt block of Figure 4-4 and shows the resolution of interrupt
sources within the SCI subsystem.
相关PDF资料
PDF描述
MC68711E20MFNE3 IC MCU 8BIT 52-PLCC
HCE103MBCCJ0KR CAP CER 10000PF 3KV 20% RADIAL
MC68HC705C9ACFNE IC MCU 8BIT 44-PLCC
VI-B5P-CU-F3 CONVERTER MOD DC/DC 13.8V 200W
MC68HC705C9AFNE IC MCU 8BIT 44-PLCC
相关代理商/技术参数
参数描述
MC68711E20MFNE2 功能描述:8位微控制器 -MCU 8B 20K EPROM 768RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
MC68711E20MFNE3 功能描述:IC MCU 8BIT 52-PLCC RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 标准包装:1 系列:AVR® ATmega 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C,SPI,UART/USART 外围设备:欠压检测/复位,POR,PWM,WDT 输入/输出数:32 程序存储器容量:32KB(16K x 16) 程序存储器类型:闪存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:44-TQFP 包装:剪切带 (CT) 其它名称:ATMEGA324P-B15AZCT
MC68711E20MFNE3R 功能描述:IC MCU 8BIT 52-PLCC RoHS:是 类别:集成电路 (IC) >> 嵌入式 - 微控制器, 系列:HC11 标准包装:1 系列:AVR® ATmega 核心处理器:AVR 芯体尺寸:8-位 速度:16MHz 连通性:I²C,SPI,UART/USART 外围设备:欠压检测/复位,POR,PWM,WDT 输入/输出数:32 程序存储器容量:32KB(16K x 16) 程序存储器类型:闪存 EEPROM 大小:1K x 8 RAM 容量:2K x 8 电压 - 电源 (Vcc/Vdd):2.7 V ~ 5.5 V 数据转换器:A/D 8x10b 振荡器型:内部 工作温度:-40°C ~ 125°C 封装/外壳:44-TQFP 包装:剪切带 (CT) 其它名称:ATMEGA324P-B15AZCT
MC68711E20VFNE2 功能描述:8位微控制器 -MCU 8B 20K EPROM 768RAM RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
MC6875 制造商:MOTOROLA 制造商全称:Motorola, Inc 功能描述:CLOCK GENERATOR/DRIVER (SCHOTTKY MONOLITHIC INTEGRATED CIRCUIT)