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參數(shù)資料
| 型號： | AT91SAM9XE512-QU |
| 廠商： | Atmel |
| 文件頁數(shù)： | 6/159頁 |
| 文件大?。?/td> | 0K |
| 描述： | MCU ARM9 512K FLASH 208-PQFP |
| 產(chǎn)品培訓(xùn)模塊： | MCU Product Line Introduction |
| 標(biāo)準(zhǔn)包裝： | 24 |
| 系列： | SAM9XE |
| 核心處理器： | ARM9 |
| 芯體尺寸： | 16/32-位 |
| 速度： | 180MHz |
| 連通性： | EBI/EMI，以太網(wǎng)，I²C，MMC，SPI，SSC，UART/USART，USB |
| 外圍設(shè)備： | 欠壓檢測/復(fù)位，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 96 |
| 程序存儲器容量： | 512KB（512K x 8） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 56K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 1.65 V ~ 1.95 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 4x10b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 208-MQFP，208-PQFP |
| 包裝： | 托盤 |
| 配用： | AT91SAM9XE-EK-ND - KIT EVAL FOR AT91SAM9XE AT91SAM-ICE-ND - EMULATOR FOR AT91 ARM7/ARM9 |
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2003 Microchip Technology Inc.
Preliminary
DS40300C-page 101
PIC16F62X
14.6
Interrupts
The PIC16F62X has 10 sources of interrupt:
External Interrupt RB0/INT
TMR0 Overflow Interrupt
PORTB Change Interrupts (pins RB7:RB4)
Comparator Interrupt
USART Interrupt TX
USART Interrupt RX
CCP Interrupt
TMR1 Overflow Interrupt
TMR2 Match Interrupt
EEPROM
The interrupt control register (INTCON) records
individual interrupt requests in flag bits. It also has
individual and global interrupt enable bits.
A global interrupt enable bit, GIE (INTCON<7>)
enables (if set) all un-masked interrupts or disables (if
cleared) all interrupts. Individual interrupts can be
disabled through their corresponding enable bits in
INTCON register. GIE is cleared on RESET.
The “return from interrupt” instruction, RETFIE, exits
interrupt routine as well as sets the GIE bit, which re-
enable RB0/INT interrupts.
The INT pin interrupt, the RB port change interrupt and
the TMR0 overflow interrupt flags are contained in the
INTCON register.
The peripheral interrupt flag is contained in the special
register PIR1. The corresponding interrupt enable bit is
contained in special registers PIE1.
When an interrupt is responded to, the GIE is cleared
to disable any further interrupt, the return address is
pushed into the stack and the PC is loaded with 0004h.
Once in the interrupt service routine the source(s) of
the interrupt can be determined by polling the interrupt
flag bits. The interrupt flag bit(s) must be cleared in soft-
ware before re-enabling interrupts to avoid RB0/INT
recursive interrupts.
For external interrupt events, such as the INT pin or
PORTB change interrupt, the interrupt latency will be
three or four instruction cycles. The exact latency
depends when the interrupt event occurs (Figure 14-
15). The latency is the same for one or two cycle
instructions. Once in the interrupt service routine the
source(s) of the interrupt can be determined by polling
the interrupt flag bits. The interrupt flag bit(s) must be
cleared in software before re-enabling interrupts to
avoid multiple interrupt requests. Individual interrupt
flag bits are set regardless of the status of their
corresponding mask bit or the GIE bit.
FIGURE 14-14:
INTERRUPT LOGIC
Note 1: Individual interrupt flag bits are set
regardless
of
the
status
of
their
corresponding mask bit or the GIE bit.
2: When an instruction that clears the GIE
bit is executed, any interrupts that were
pending for execution in the next cycle
are ignored. The CPU will execute a NOP
in the cycle immediately following the
instruction which clears the GIE bit. The
interrupts which were ignored are still
pending to be serviced when the GIE bit
is set again.
TMR2IF
TMR2IE
CCP1IF
CCP1IE
CMIF
CMIE
TXIF
TXIE
RCIF
RCIE
T0IF
T0IE
INTF
INTE
RBIF
RBIE
GIE
PEIE
Wake-up (If in SLEEP mode)
Interrupt to CPU
EEIE
EEIF
TMR1IF
TMR1IE
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| AT91SAM9XE-EK | 功能描述:開發(fā)板和工具包 - ARM Eval Kit for SAM9XE Series RoHS:否 制造商:Arduino 產(chǎn)品:Development Boards 工具用于評估:ATSAM3X8EA-AU 核心:ARM Cortex M3 接口類型:DAC, ICSP, JTAG, UART, USB 工作電源電壓:3.3 V |
| AT91SAM-ICE | 功能描述:仿真器/模擬器 JTAG emulator AT91 ARM7/ARM9 RoHS:否 制造商:Blackhawk 產(chǎn)品:System Trace Emulators 工具用于評估:C6000, C5000, C2000, OMAP, DAVINCI, SITARA, TMS470, TMS570, ARM 7/9, ARM Cortex A8/R4/M3 用于:XDS560v2 |
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| AT91SC192192CT-USB | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:32-bit Secure Microcontrollers |
| AT91SC25672RC | 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:32-bit Secure Microcontroller for Smart Cards |
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