您的位置：维库电子市场网 > Datasheet > DSPIC30F6011AT-20E/PF

DSPIC30F6011AT-20E/PF Datasheet

  • DSPIC30F6011AT-20E/PF

  • High Performance Digital Signal Controllers

  • 3527.50KB

  • 222页

  • MICROCHIP   MICROCHIP

阅览下载 纠错 0

扫码查看芯片数据手册

上传产品规格书

PDF预览

dsPIC30F6011/6012/6013/6014
FIGURE 5-2:
0x0000
15
Stack Grows Towards
Higher Address
INTERRUPT STACK
FRAME
0
5.6
Fast Context Saving
A context saving option is available using shadow reg-
isters. Shadow registers are provided for the DC, N,
OV, Z and C bits in SR, and the registers W0 through
W3. The shadows are only one level deep. The shadow
registers are accessible using the
PUSH.S
and
POP.S
instructions only.
When the processor vectors to an interrupt, the
PUSH.S
instruction can be used to store the current
value of the aforementioned registers into their
respective shadow registers.
If an ISR of a certain priority uses the
PUSH.S
and
POP.S
instructions for fast context saving, then a
higher priority ISR should not include the same instruc-
tions. Users must save the key registers in software
during a lower priority interrupt if the higher priority ISR
uses fast context saving.
PC<15:0>
SRL IPL3 PC<22:16>
<Free Word>
W15 (before
CALL)
W15 (after
CALL)
POP : [--W15]
PUSH: [W15++]
Note 1:
The user can always lower the priority
level by writing a new value into SR. The
Interrupt Service Routine must clear the
interrupt flag bits in the IFSx register
before lowering the processor interrupt
priority, in order to avoid recursive
interrupts.
2:
The IPL3 bit (CORCON<3>) is always
clear when interrupts are being pro-
cessed. It is set only during execution of
traps.
The
RETFIE
(return from interrupt) instruction will
unstack the program counter and STATUS registers to
return the processor to its state prior to the interrupt
sequence.
5.7
External Interrupt Requests
The interrupt controller supports up to five external
interrupt request signals, INT0-INT4. These inputs are
edge sensitive; they require a low-to-high or a high-to-
low transition to generate an interrupt request. The
INTCON2 register has five bits, INT0EP-INT4EP, that
select the polarity of the edge detection circuitry.
5.8
Wake-up from Sleep and Idle
The interrupt controller may be used to wake-up the
processor from either Sleep or Idle modes, if Sleep or
Idle mode is active when the interrupt is generated.
If an enabled interrupt request of sufficient priority is
received by the interrupt controller, then the standard
interrupt request is presented to the processor. At the
same time, the processor will wake-up from Sleep or
Idle and begin execution of the Interrupt Service
Routine (ISR) needed to process the interrupt request.
5.5
Alternate Vector Table
In program memory, the Interrupt Vector Table (IVT) is
followed by the Alternate Interrupt Vector Table (AIVT),
as shown in Table 5-1. Access to the alternate vector
table is provided by the ALTIVT bit in the INTCON2 reg-
ister. If the ALTIVT bit is set, all interrupt and exception
processes will use the alternate vectors instead of the
default vectors. The alternate vectors are organized in
the same manner as the default vectors. The AIVT sup-
ports emulation and debugging efforts by providing a
means to switch between an application and a support
environment without requiring the interrupt vectors to
be reprogrammed. This feature also enables switching
between applications for evaluation of different
software algorithms at run time.
If the AIVT is not required, the program memory allo-
cated to the AIVT may be used for other purposes.
AIVT is not a protected section and may be freely
programmed by the user.
铮?/div>
2004 Microchip Technology Inc.
Preliminary
DS70117C-page 47

DSPIC30F6011AT-20E/PF相关型号PDF文件下载

您可能感兴趣的PDF文件资料

热门IC型号推荐

©2024 维库电子市场网（www.dzsc.com）　备案号：浙B2-20050339-1 经营许可证：浙B2-20210386版权声明
买家服务热线：0571-85317607 | 买家服务部QQ： QQ:1609526468
卖家服务热线：0571-85317607 | 卖家服务部QQ： QQ:331652727

扫码下载APP，
一键连接广大的电子世界。

在线人工客服

买家服务：
卖家服务：

0571-85317607

客服在线时间周一至周五
9:00-17:30

关注官方微信号，
第一时间获取资讯。

建议反馈
返回顶部

建议反馈

联系人：

联系方式：

按住滑块，拖拽到最右边
>>
感谢您向阿库提出的宝贵意见，您的参与是维库提升服务的动力！意见一经采纳，将有感恩红包奉上哦！

PDF纠错X

投诉电话：0571-85317607 投诉QQ：

如选匿名将无法为您反馈投诉结果，建议实名投诉！