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参数资料
| 型号： | AT89C51CC01UA-RLTUM |
| 厂商： | Atmel |
| 文件页数： | 10/123页 |
| 文件大小： | 0K |
| 描述： | IC 8051 MCU FLASH 32K 44-VQFP |
| 产品培训模块： | MCU Product Line Introduction |
| 标准包装： | 800 |
| 系列： | AT89C CAN |
| 核心处理器： | 8051 |
| 芯体尺寸： | 8-位 |
| 速度： | 40MHz |
| 连通性： | CAN，UART/USART |
| 外围设备： | POR，PWM，WDT |
| 输入/输出数： | 34 |
| 程序存储器容量： | 32KB（32K x 8） |
| 程序存储器类型： | 闪存 |
| EEPROM 大小： | 2K x 8 |
| RAM 容量： | 1.25K x 8 |
| 电压 - 电源 (Vcc/Vdd)： | 3 V ~ 5.5 V |
| 数据转换器： | A/D 8x10b |
| 振荡器型： | 外部 |
| 工作温度： | -40°C ~ 85°C |
| 封装/外壳： | 44-LQFP |
| 包装： | 托盘 |
| 产品目录页面： | 616 (CN2011-ZH PDF) |
| 配用： | AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU |
| 其它名称： | AT89C51CC01UARLTUM |
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2010 Microchip Technology Inc.
DS41303G-page 107
PIC18F2XK20/4XK20
9.0
INTERRUPTS
The PIC18F2XK20/4XK20 devices have multiple
interrupt sources and an interrupt priority feature that
allows most interrupt sources to be assigned a high
priority level or a low priority level. The high priority
interrupt vector is at 0008h and the low priority interrupt
vector is at 0018h. A high priority interrupt event will
interrupt a low priority interrupt that may be in progress.
There are ten registers which are used to control
interrupt operation. These registers are:
RCON
INTCON
INTCON2
INTCON3
PIR1, PIR2
PIE1, PIE2
IPR1, IPR2
It is recommended that the Microchip header files sup-
plied with MPLAB IDE be used for the symbolic bit
names in these registers. This allows the assembler/
compiler to automatically take care of the placement of
these bits within the specified register.
In general, interrupt sources have three bits to control
their operation. They are:
Flag bit to indicate that an interrupt event
occurred
Enable bit that allows program execution to
branch to the interrupt vector address when the
flag bit is set
Priority bit to select high priority or low priority
9.1
Mid-Range Compatibility
When the IPEN bit is cleared (default state), the interrupt
priority feature is disabled and interrupts are compatible
with
PIC
microcontroller
mid-range
devices.
In
Compatibility mode, the interrupt priority bits of the IPRx
registers have no effect. The PEIE bit of the INTCON
register is the global interrupt enable for the peripherals.
The PEIE bit disables only the peripheral interrupt
sources and enables the peripheral interrupt sources
when the GIE bit is also set. The GIE bit of the INTCON
register is the global interrupt enable which enables all
non-peripheral interrupt sources and disables all
interrupt sources, including the peripherals. All interrupts
branch to address 0008h in Compatibility mode.
9.2
Interrupt Priority
The interrupt priority feature is enabled by setting the
IPEN bit of the RCON register. When interrupt priority
is enabled the GIE and PEIE global interrupt enable
bits of Compatibility mode are replaced by the GIEH
high priority, and GIEL low priority, global interrupt
enables. When set, the GIEH bit of the INTCON regis-
ter enables all interrupts that have their associated
IPRx register or INTCONx register priority bit set (high
priority). When clear, the GIEH bit disables all interrupt
sources including those selected as low priority. When
clear, the GIEL bit of the INTCON register disables only
the interrupts that have their associated priority bit
cleared (low priority). When set, the GIEL bit enables
the low priority sources when the GIEH bit is also set.
When the interrupt flag, enable bit and appropriate
global interrupt enable bit are all set, the interrupt will
vector immediately to address 0008h for high priority,
or 0018h for low priority, depending on level of the
interrupting source’s priority bit. Individual interrupts
can be disabled through their corresponding interrupt
enable bits.
9.3
Interrupt Response
When an interrupt is responded to, the global interrupt
enable bit is cleared to disable further interrupts. The
GIE bit is the global interrupt enable when the IPEN bit
is cleared. When the IPEN bit is set, enabling interrupt
priority levels, the GIEH bit is the high priority global
interrupt enable and the GIEL bit is the low priority
global interrupt enable. High priority interrupt sources
can interrupt a low priority interrupt. Low priority
interrupts are not processed while high priority
interrupts are in progress.
The return address is pushed onto the stack and the
PC is loaded with the interrupt vector address (0008h
or 0018h). Once in the Interrupt Service Routine, the
source(s) of the interrupt can be determined by polling
the interrupt flag bits in the INTCONx and PIRx
registers. The interrupt flag bits must be cleared by
software
before
re-enabling
interrupts
to
avoid
repeating the same interrupt.
The “return from interrupt” instruction, RETFIE, exits
the interrupt routine and sets the GIE bit (GIEH or GIEL
if priority levels are used), which re-enables interrupts.
For external interrupt events, such as the INT pins or
the PORTB interrupt-on-change, the interrupt latency
will be three to four instruction cycles. The exact
latency is the same for one-cycle or two-cycle
instructions. Individual interrupt flag bits are set,
regardless of the status of their corresponding enable
bits or the global interrupt enable bit.
Note:
Do not use the MOVFF instruction to modify
any of the interrupt control registers while
any interrupt is enabled. Doing so may
cause erratic microcontroller behavior.
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相关代理商/技术参数 |
参数描述 |
|---|---|
| AT89C51CC01UA-SLSUM | 功能描述:8位微控制器 -MCU CAN-STICK Bootloader UART IND 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 |
| AT89C51CC01UU-RLTUM | 功能描述:8位微控制器 -MCU Microcontroller 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 |
| AT89C51CC01UU-SLSUM | 功能描述:8位微控制器 -MCU Microcontroller 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 |
| AT89C51CC02 | 制造商:ATMEL 制造商全称:ATMEL Corporation 功能描述:Enhanced 8-bit Microcontroller with CAN Controller and Flash |
| AT89C51CC02CA-RATUM | 功能描述:8位微控制器 -MCU CAN/C51 Boot CAN 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 |
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