參數(shù)資料
型號(hào)： C8051F012
廠商： Silicon Laboratories Inc
文件頁數(shù)： 147/171頁
文件大?。?/td> 0K
描述： IC 8051 MCU 32K FLASH 32LQFP
標(biāo)準(zhǔn)包裝： 250
系列： C8051F01x
核心處理器： 8051
芯體尺寸： 8-位
速度： 20MHz
連通性： SMBus（2 線/I²C），SPI，UART/USART
外圍設(shè)備： 欠壓檢測(cè)/復(fù)位，POR，PWM，溫度傳感器，WDT
輸入/輸出數(shù)： 8
程序存儲(chǔ)器容量： 32KB（32K x 8）
程序存儲(chǔ)器類型： 閃存
RAM 容量： 256 x 8
電壓 - 電源 (Vcc/Vdd)： 2.7 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 4x10b; D/A 2x12b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 32-LQFP
包裝： 托盤
C8051F000/1/2/5/6/7
C8051F010/1/2/5/6/7
10.4.
INTERRUPT HANDLER
The CIP-51 includes an extended interrupt system supporting a total of 22 interrupt sources with two priority levels.
The allocation of interrupt sources between on-chip peripherals and external inputs pins varies according to the
specific version of the device. Each interrupt source has one or more associated interrupt-pending flag(s) located in
an SFR. When a peripheral or external source meets a valid interrupt condition, the associated interrupt-pending
flag is set to logic 1.
If interrupts are enabled for the source, an interrupt request is generated when the interrupt-pending flag is set. As
soon as execution of the current instruction is complete, the CPU generates an LCALL to a predetermined address
to begin execution of an interrupt service routine (ISR). Each ISR must end with an RETI instruction, which
returns program execution to the next instruction that would have been executed if the interrupt request had not
occurred. If interrupts are not enabled, the interrupt-pending flag is ignored by the hardware and program execution
continues as normal. (The interrupt-pending flag is set to logic 1 regardless of the interrupt’s enable/disable state.)
Each interrupt source can be individually enabled or disabled through the use of an associated interrupt enable bit in
an SFR (IE-EIE2). However, interrupts must first be globally enabled by setting the EA bit (IE.7) to logic 1 before
the individual interrupt enables are recognized. Setting the EA bit to logic 0 disables all interrupt sources regardless
of the individual interrupt-enable settings.
Some interrupt-pending flags are automatically cleared by the hardware when the CPU vectors to the ISR.
However, most are not cleared by the hardware and must be cleared by software before returning from the ISR. If
an interrupt-pending flag remains set after the CPU completes the return-from-interrupt (RETI) instruction, a new
interrupt request will be generated immediately and the CPU will re-enter the ISR after the completion of the next
instruction.
10.4.1. MCU Interrupt Sources and Vectors
The MCUs allocate 12 interrupt sources to on-chip peripherals. Up to 10 additional external interrupt sources are
available depending on the I/O pin configuration of the device. Software can simulate an interrupt by setting any
interrupt-pending flag to logic 1. If interrupts are enabled for the flag, an interrupt request will be generated and the
CPU will vector to the ISR address associated with the interrupt-pending flag. MCU interrupt sources, associated
vector addresses, priority order and control bits are summarized in Table 10.4. Refer to the datasheet section
associated with a particular on-chip peripheral for information regarding valid interrupt conditions for the peripheral
and the behavior of its interrupt-pending flag(s).
10.4.2. External Interrupts
Two of the external interrupt sources (/INT0 and /INT1) are configurable as active-low level-sensitive or active-low
edge-sensitive inputs depending on the setting of IT0 (TCON.0) and IT1 (TCON.2).
IE0 (TCON.1) and IE1
(TCON.3) serve as the interrupt-pending flag for the /INT0 and /INT1 external interrupts, respectively. If an /INT0
or /INT1 external interrupt is configured as edge-sensitive, the corresponding interrupt-pending flag is automatically
cleared by the hardware when the CPU vectors to the ISR. When configured as level sensitive, the interrupt-
pending flag follows the state of the external interrupt’s input pin. The external interrupt source must hold the input
active until the interrupt request is recognized. It must then deactivate the interrupt request before execution of the
ISR completes or another interrupt request will be generated.
The remaining four external interrupts (External Interrupts 4-7) are active-low, edge-sensitive inputs. The interrupt-
pending flags for these interrupts are in the Port 1 Interrupt Flag Register shown in Figure 15.10.
77
Rev. 1.7
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
C8051F012/005 制造商:Silicon Laboratories Inc 功能描述:
C8051F012-GQ 功能描述:8位微控制器 -MCU 32KB 10ADC 32P MCU RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
C8051F012-GQR 功能描述:8位微控制器 -MCU 32KB 10ADC 32Pin MCU Tape and Reel RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
C8051F012-PX0005GQ 制造商:Silicon Laboratories Inc 功能描述:
C8051F012R 功能描述:8位微控制器 -MCU C 10Bit 32Pin RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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