參數(shù)資料
型號: DSPIC30F3014-20I/PT
廠商: Microchip Technology
文件頁數(shù): 135/153頁
文件大?。?/td> 0K
描述: IC DSPIC MCU/DSP 24K 44TQFP
產(chǎn)品培訓(xùn)模塊: Serial Communications using dsPIC30F I2C
Serial Communications using dsPIC30F SPI
Serial Communications using dsPIC30F UART
dsPIC30F 12 bit ADC - Part 2
dsPIC30F Addressing Modes - Part 1
dsPIC30F Architecture - Part 1
dsPIC30F DSP Engine & ALU
dsPIC30F Interrupts
dsPIC30F Motor Control PWM
dsPIC Timers
Asynchronous Stimulus
dsPIC30F Addressing Modes - Part 2
dsPIC30F Architecture - Part 2
dsPIC30F 12-bit ADC Part 1
標(biāo)準(zhǔn)包裝: 160
系列: dsPIC™ 30F
核心處理器: dsPIC
芯體尺寸: 16-位
速度: 20 MIPS
連通性: I²C,SPI,UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,PWM,WDT
輸入/輸出數(shù): 30
程序存儲器容量: 24KB(8K x 24)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 1K x 8
RAM 容量: 2K x 8
電壓 - 電源 (Vcc/Vdd): 2.5 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 13x12b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-TQFP
包裝: 托盤
配用: XLT80PT3-ND - SOCKET TRAN ICE 80MQFP/TQFP
AC164305-ND - MODULE SKT FOR PM3 44TQFP
其它名稱: DSPIC30F301420IPT
dsPIC30F3014/4013
DS70138G-page 82
2010 Microchip Technology Inc.
12.1.2
CAPTURE BUFFER OPERATION
Each capture channel has an associated FIFO buffer
which is four 16-bit words deep. There are two status
flags which provide status on the FIFO buffer:
ICBNE – Input Capture Buffer Not Empty
ICOV – Input Capture Overflow
The ICBFNE is set on the first input capture event and
remain set until all capture events have been read from
the FIFO. As each word is read from the FIFO, the
remaining words are advanced by one position within
the buffer.
In the event that the FIFO is full with four capture
events and a fifth capture event occurs prior to a read
of the FIFO, an overflow condition occurs and the ICOV
bit is set to a logic ‘1’. The fifth capture event is lost and
is not stored in the FIFO. No additional events are
captured until all four events have been read from the
buffer.
If a FIFO read is performed after the last read and no
new capture event has been received, the read will
yield indeterminate results.
12.1.3
TIMER2 AND TIMER3 SELECTION
MODE
The input capture module consists of up to 8 input cap-
ture channels. Each channel can select between one of
two timers for the time base, Timer2 or Timer3.
Selection of the timer resource is accomplished
through SFR bit, ICTMR (ICxCON<7>). Timer3 is the
default timer resource available for the input capture
module.
12.1.4
HALL SENSOR MODE
When the input capture module is set for capture on
every edge, rising and falling, ICM<2:0> = 001, the
following operations are performed by the input capture
logic:
The input capture interrupt flag is set on every
edge, rising and falling.
The interrupt on Capture mode setting bits,
ICI<1:0>, is ignored since every capture
generates an interrupt.
A capture overflow condition is not generated in
this mode.
12.2
Input Capture Operation During
Sleep and Idle Modes
An input capture event generates a device wake-up or
interrupt, if enabled, if the device is in CPU Idle or Sleep
mode.
Independent of the timer being enabled, the input cap-
ture module wakes up from the CPU Sleep or Idle mode
when a capture event occurs if ICM<2:0> = 111 and the
interrupt enable bit is asserted. The same wake-up can
generate an interrupt if the conditions for processing the
interrupt have been satisfied. The wake-up feature is
useful as a method of adding extra external pin
interrupts.
12.2.1
INPUT CAPTURE IN CPU SLEEP
MODE
CPU Sleep mode allows input capture module opera-
tion with reduced functionality. In the CPU Sleep mode,
the ICI<1:0> bits are not applicable and the input cap-
ture module can only function as an external interrupt
source.
The capture module must be configured for interrupt
only on rising edge (ICM<2:0> = 111) in order for the
input capture module to be used while the device is in
Sleep mode. The prescale settings of 4:1 or 16:1 are
not applicable in this mode.
12.2.2
INPUT CAPTURE IN CPU IDLE
MODE
CPU Idle mode allows input capture module operation
with full functionality. In the CPU Idle mode, the Inter-
rupt mode selected by the ICI<1:0> bits is applicable,
as well as the 4:1 and 16:1 capture prescale settings
which are defined by control bits, ICM<2:0>. This mode
requires the selected timer to be enabled. Moreover,
the ICSIDL bit must be asserted to a logic ‘0’.
If
the
input
capture
module
is
defined
as
ICM<2:0> = 111 in CPU Idle mode, the input capture
pin serves only as an external interrupt pin.
12.3
Input Capture Interrupts
The input capture channels have the ability to generate
an interrupt based upon the selected number of
capture events. The selection number is set by control
bits, ICI<1:0> (ICxCON<6:5>).
Each channel provides an interrupt flag (ICxIF) bit. The
respective capture channel interrupt flag is located in
the corresponding IFSx register.
Enabling an interrupt is accomplished via the respec-
tive Input Capture Channel Interrupt Enable (ICxIE) bit.
The capture interrupt enable bit is located in the
corresponding IEC Control register.
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