參數(shù)資料
型號(hào): DSPIC30F4011-20I/P
廠商: Microchip Technology
文件頁(yè)數(shù): 67/238頁(yè)
文件大?。?/td> 0K
描述: IC DSPIC MCU/DSP 48K 40DIP
產(chǎn)品培訓(xùn)模塊: dsPIC30F Quadrature Encoder Interface
Serial Communications using dsPIC30F CAN
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: 10
系列: dsPIC™ 30F
核心處理器: dsPIC
芯體尺寸: 16-位
速度: 20 MIPS
連通性: CAN,I²C,SPI,UART/USART
外圍設(shè)備: 高級(jí)欠壓探測(cè)/復(fù)位,電機(jī)控制 PWM,QEI,POR,PWM,WDT
輸入/輸出數(shù): 30
程序存儲(chǔ)器容量: 48KB(16K x 24)
程序存儲(chǔ)器類(lèi)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 9x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 40-DIP(0.600",15.24mm)
包裝: 管件
配用: AC30F003-ND - MODULE SOCKET DSPIC30F 40DIP
ACICE0206-ND - ADAPTER MPLABICE 40P 600 MIL
其它名稱(chēng): DSPIC30F4011-20IP
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2010 Microchip Technology Inc.
DS70135G-page 159
dsPIC30F4011/4012
21.3.1.1
POR with Long Crystal Start-up Time
(with FSCM Enabled)
The oscillator start-up circuitry is not linked to the POR
circuitry.
Some
crystal
circuits
(especially
low-
frequency crystals) have a relatively long start-up time.
Therefore, one or more of the following conditions is
possible after the POR timer and the PWRT have
expired:
The oscillator circuit has not begun to oscillate.
The Oscillator Start-up Timer has not expired (if a
crystal oscillator is used).
The PLL has not achieved a lock (if PLL is used).
If the FSCM is enabled and one of the above conditions
is true, then a clock failure trap occurs. The device
automatically switches to the FRC oscillator and the
user can switch to the desired crystal oscillator in the
trap ISR.
21.3.1.2
Operating without FSCM and PWRT
If the FSCM is disabled and the Power-up Timer
(PWRT) is also disabled, then the device exits rapidly
from Reset on power-up. If the clock source is FRC,
LPRC, ERC or EC, it will be active immediately.
If the FSCM is disabled and the system clock has not
started, the device will be in a frozen state at the Reset
vector until the system clock starts. From the user’s
perspective, the device will appear to be in Reset until
a system clock is available.
21.3.2
BOR: PROGRAMMABLE
BROWN-OUT RESET
The BOR (Brown-out Reset) module is based on an
internal voltage reference circuit. The main purpose of
the BOR module is to generate a device Reset when a
brown-out condition occurs. Brown-out conditions are
generally caused by glitches on the AC mains (i.e.,
missing portions of the AC cycle waveform due to bad
power transmission lines, or voltage sags due to exces-
sive current draw when a large inductive load is turned
on).
The BOR module allows selection of one of the
following voltage trip points (see Table 24-10):
2.6V-2.71V
4.1V-4.4V
4.58V-4.73V
A BOR generates a Reset pulse, which resets the
device. The BOR selects the clock source, based on
the device Configuration bit values (FOS<1:0> and
FPR<3:0>). Furthermore, if an oscillator mode is
selected, the BOR activates the Oscillator Start-up
Timer (OST). The system clock is held until OST
expires. If the PLL is used, then the clock is held until
the LOCK bit (OSCCON<5>) is ‘1’.
Concurrently, the POR time-out (TPOR) and the PWRT
time-out (TPWRT) are applied before the internal Reset
is released. If TPWRT = 0 and a crystal oscillator is
being used, then a nominal delay of TFSCM = 100
μs is
applied. The total delay in this case is (TPOR + TFSCM).
The BOR status bit (RCON<1>) is set to indicate that a
BOR has occurred. The BOR circuit, if enabled, contin-
ues to operate while in Sleep or Idle modes and resets
the device if VDD falls below the BOR threshold voltage.
FIGURE 21-6:
EXTERNAL POWER-ON
RESET CIRCUIT (FOR
SLOW VDD POWER-UP)
Note:
The BOR voltage trip points indicated here
are nominal values provided for design
guidance only.
Note:
Dedicated supervisory devices, such as
the MCP1XX and MCP8XX, may also be
used as an external Power-on Reset
circuit.
Note 1:
External Power-on Reset circuit is required
only if the VDD power-up slope is too slow.
The diode D helps discharge the capacitor
quickly when VDD powers down.
2:
R should be suitably chosen so as to make
sure that the voltage drop across R does not
violate the device’s electrical specification.
3:
R1 should be suitably chosen so as to limit
any current flowing into MCLR from external
capacitor C, in the event of MCLR pin break-
down, due to Electrostatic Discharge (ESD)
or Electrical Overstress (EOS).
C
R1
R
D
VDD
dsPIC30F
MCLR
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