參數(shù)資料
型號: DSPIC30F2020-30I/MMB32
廠商: Microchip Technology
文件頁數(shù): 41/285頁
文件大?。?/td> 0K
描述: IC DSPIC MCU/DSP 12K 28QFN
特色產(chǎn)品: SMPS & Digital Power Conversion Solutions
標準包裝: 1
系列: dsPIC™ 30F
核心處理器: dsPIC
芯體尺寸: 16-位
速度: 30 MIP
連通性: I²C,IrDA,LIN,SPI,UART/USART
外圍設備: 欠壓檢測/復位,POR,PWM,WDT
輸入/輸出數(shù): 21
程序存儲器容量: 12KB(4K x 24)
程序存儲器類型: 閃存
RAM 容量: 512 x 8
電壓 - 電源 (Vcc/Vdd): 3 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-VQFN 裸露焊盤
包裝: 管件
配用: DM300023-ND - KIT DEMO DSPICDEM SMPS BUCK
其它名稱: Q4035438A
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2006 Microchip Technology Inc.
Preliminary
DS70178C-page 133
dsPIC30F1010/202X
12.23.1
FAULT INTERRUPTS
The FLTIENx bits in the PWMCONx registers deter-
mine if an interrupt will be generated when the FLTx
input is asserted high. The FLTMOD bits in the
FCLCONx register determines how the PWM genera-
tor and its outputs respond to the selected Fault input
pin. The FLTDAT<1:0> bits in the IOCONx registers
supply the data values to be assigned to the PWMxH,L
pins in the advent of a Fault.
The Fault pin logic can operate separately from the
PWM logic as an external interrupt pin. If the faults are
disabled from affecting the PWM generators in the
FCLCONx register, then the Fault pin can be used as a
general purpose interrupt pin.
12.23.2
FAULT STATES
The IOCONx register has two bits that determine the
state of each PWMx I/O pin when they are overridden
by a Fault input. When these bits are cleared, the
PWM I/O pin is driven to the inactive state. If the bit is
set, the PWM I/O pin is driven to the active state. The
active and inactive states are referenced to the polarity
defined for each PWM I/O pin (HPOL and LPOL
polarity control bits).
12.23.3
FAULT INPUT MODES
The Fault input pin has two modes of operation:
Latched Mode: When the Fault pin is asserted,
the PWM outputs go to the states defined in the
FLTDAT bits in the IOCONx registers. The PWM
outputs remain in this state until the Fault pin is
deasserted AND the corresponding interrupt flag
has been cleared in software. When both of these
actions have occurred, the PWM outputs return to
normal operation at the beginning of the next
PWM cycle boundary. If the FLTSTAT bit is
cleared before the Fault condition ends, the PWM
module waits until the Fault pin is no longer
asserted to restore the outputs. Software can
clear the FLTSTAT bit by writing a zero to the
FLTIEN bit.
Cycle-by-Cycle Mode: When the Fault input pin
is asserted, the PWM outputs remain in the deas-
serted PWM state for as long as the Fault pin is
asserted. For Complementary Output modes,
PWMH is low (deasserted) and PWML is high
(asserted). After the Fault pin is driven high, the
PWM outputs return to normal operation at the
beginning of the following PWM cycle.
The operating mode for each Fault input pin is selected
using the FLTMOD<1:0> control bits in the FCLCONx
register.
12.23.4
FAULT ENTRY
The response of the PWM pins to the Fault input pins
is always asynchronous with respect to the device
clock signals. That is, the PWM outputs should imme-
diately go to the states defined in the FLTDAT register
bits without any interaction from the dsPIC DSC device
or software.
tion regarding data sensitivity and behavior in response
to current-limit or Fault events.
12.23.5
FAULT EXIT
The restoration of the PWM signals after a Fault condi-
tion has ended must occur at a PWM cycle boundary to
ensure proper synchronization of PWM signal edges
and manual signal overrides. The next PWM cycle
begins when the PTMRx value is zero.
12.23.6
FAULT EXIT WITH PTMR DISABLED
There is a special case for exiting a Fault condition
when the PWM time base is disabled (PTEN = 0).
When a Fault input is programmed for Cycle-by-Cycle
mode, the PWM outputs are immediately restored to
normal operation when the Fault input pin is deas-
serted. The PWM outputs should return to their default
programmed values. (The time base is disabled, so
there is no reason to wait for the beginning of the next
PWM cycle.)
When a Fault input is programmed for Latched mode,
the PWM outputs are restored immediately when the
Fault input pin is deasserted AND the FSTAT bit has
been cleared in software.
12.23.7
FAULT PIN SOFTWARE CONTROL
The Fault pin can be controlled manually in software.
Since the Fault input is shared with a PORT I/O pin, the
PORT pin can be configured as an output by clearing
the corresponding TRIS bit. When the PORT bit for the
pin is cleared, the Fault input will be activated.
Note:
The user should use caution when control-
ling the Fault inputs in software. If the
TRIS bit for the Fault pin is cleared and the
PORT bit is set high, then the Fault input
cannot be driven externally.
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