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參數(shù)資料
| 型號(hào)： | AT32AP7002-CTUT |
| 廠(chǎng)商： | Atmel |
| 文件頁(yè)數(shù)： | 40/83頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC MCU 32BIT AVR32 196-CBGA |
| 產(chǎn)品培訓(xùn)模塊： | MCU Product Line Introduction |
| 標(biāo)準(zhǔn)包裝： | 945 |
| 系列： | AVR®32 AP7 |
| 核心處理器： | AVR |
| 芯體尺寸： | 32-位 |
| 速度： | 150MHz |
| 連通性： | EBI/EMI，I²C，MMC，PS2，SPI，SSC，UART/USART，USB |
| 外圍設(shè)備： | AC'97，DMA，I²S，LCD，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 85 |
| 程序存儲(chǔ)器類(lèi)型： | ROMless |
| RAM 容量： | 32K x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 1.65 V ~ 1.95 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | D/A 2x16b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 196-CBGA |
| 包裝： | 托盤(pán) |
| 配用： | ATAVRONEKIT-ND - KIT AVR/AVR32 DEBUGGER/PROGRMMR ATNGW100-ND - KIT AVR32 NETWORK GATEWAY ATSTK1000-ND - KIT STARTER FOR AVR32AP7000 |
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2011 Microchip Technology Inc.
DS70118J-page 37
dsPIC30F2010
5.0
INTERRUPTS
The dsPIC30F2010 has 24 interrupt sources and four
processor exceptions (traps), which must be arbitrated
based on a priority scheme.
The CPU is responsible for reading the Interrupt Vec-
tor Table (IVT) and transferring the address contained
in the interrupt vector to the program counter. The
interrupt vector is transferred from the program data
bus into the program counter, via a 24-bit wide
multiplexer on the input of the program counter.
The Interrupt Vector Table (IVT) and Alternate Inter-
rupt Vector Table (AIVT) are placed near the beginning
of program memory (0x000004). The IVT and AIVT
are shown in Figure 5-1.
The
interrupt
controller
is
responsible
for
pre-
processing the interrupts and processor exceptions,
prior to their being presented to the processor core.
The peripheral interrupts and traps are enabled, priori-
tized and controlled using centralized special function
registers:
IFS0<15:0>, IFS1<15:0>, IFS2<15:0>
All interrupt request flags are maintained in these
three registers. The flags are set by their respective
peripherals or external signals, and they are cleared
via software.
IEC0<15:0>, IEC1<15:0>, IEC2<15:0>
All interrupt enable control bits are maintained in
these three registers. These control bits are used to
individually enable interrupts from the peripherals or
external signals.
IPC0<15:0>... IPC11<7:0>
The user-assignable priority level associated with
each of these interrupts is held centrally in these
twelve registers.
IPL<3:0> The current CPU priority level is explicitly
stored in the IPL bits. IPL<3> is present in the
CORCON register, whereas IPL<2:0> are present in
the STATUS Register (SR) in the processor core.
INTCON1<15:0>, INTCON2<15:0>
Global interrupt control functions are derived from
these two registers. INTCON1 contains the control
and status flags for the processor exceptions. The
INTCON2 register controls the external interrupt
request signal behavior and the use of the alternate
vector table.
All interrupt sources can be user-assigned to one of
seven priority levels, 1 through 7, via the IPCx
registers. Each interrupt source is associated with an
interrupt vector, as shown in Figure 5-1. Levels 7 and
1 represent the highest and lowest maskable priorities,
respectively.
If the NSTDIS bit (INTCON1<15>) is set, nesting of
interrupts is prevented. Thus, if an interrupt is currently
being serviced, processing of a new interrupt is
prevented, even if the new interrupt is of higher priority
than the one currently being serviced.
Certain interrupts have specialized control bits for
features like edge or level triggered interrupts, inter-
rupt-on-change, etc. Control of these features remains
within the peripheral module which generates the
interrupt.
The DISI instruction can be used to disable the
processing of interrupts of priorities 6 and lower for a
certain number of instructions, during which the DISI bit
(INTCON2<14>) remains set.
When an interrupt is serviced, the PC is loaded with the
address stored in the vector location in Program Mem-
ory that corresponds to the interrupt. There are 63 dif-
ferent vectors within the IVT (refer to Figure 5-1). These
vectors are contained in locations 0x000004 through
0x0000FE of program memory (refer to Figure 5-1).
These locations contain 24-bit addresses, and in order
to preserve robustness, an address error trap will take
place should the PC attempt to fetch any of these
words during normal execution. This prevents execu-
tion of random data as a result of accidentally decre-
menting a PC into vector space, accidentally mapping
a data space address into vector space or the PC roll-
ing over to 0x000000 after reaching the end of imple-
mented program memory space. Execution of a GOTO
instruction to this vector space will also generate an
address error trap.
Note:
This data sheet summarizes features of
this group of dsPIC30F devices and is not
intended to be a complete reference
source. For more information on the CPU,
peripherals,
register
descriptions
and
general device functionality, refer to the
“dsPIC30F Family Reference Manual”
(DS70046). For more information on the
device instruction set and programming,
refer to the “16-bit MCU and DSC Pro-
grammer’s
Reference
Manual”
(DS70157).
Note:
Interrupt flag bits get set when an interrupt
condition occurs, regardless of the state of
its corresponding enable bit. User soft-
ware should ensure the appropriate inter-
rupt flag bits are clear prior to enabling an
interrupt.
Note:
Assigning a priority level of 0 to an inter-
rupt source is equivalent to disabling that
interrupt.
Note:
The IPL bits become read-only whenever
the NSTDIS bit has been set to ‘1’.
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