參數(shù)資料
型號(hào): DSPIC30F4012-20I/SO
廠商: Microchip Technology
文件頁(yè)數(shù): 63/238頁(yè)
文件大?。?/td> 0K
描述: IC DSPIC MCU/DSP 48K 28SOIC
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: 27
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): 20
程序存儲(chǔ)器容量: 48KB(16K x 24)
程序存儲(chǔ)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 6x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 28-SOIC(0.295",7.50mm 寬)
包裝: 管件
配用: XLT28SO-1-ND - SOCKET TRANSITION 28SOIC 300MIL
其它名稱: DSPIC30F401220ISO
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2010 Microchip Technology Inc.
DS70135G-page 155
dsPIC30F4011/4012
21.2.3
LP OSCILLATOR CONTROL
Enabling the LP oscillator is controlled with two
elements:
Current oscillator group bits, COSC<1:0>
LPOSCEN bit (OSCCON<1>)
The LP oscillator is on (even during Sleep mode) if
LPOSCEN = 1. The LP oscillator is the device clock if:
COSC<1:0> = 00 (LP selected as main osc.) and
LPOSCEN = 1
Keeping the LP oscillator on at all times allows for a
fast switch to the 32 kHz system clock for lower power
operation. Returning to the faster main oscillator still
requires a start-up time.
21.2.4
PHASE LOCKED LOOP (PLL)
The PLL multiplies the clock which is generated by the
primary oscillator. The PLL is selectable to have either
gains of x4, x8 or x16. Input and output frequency
ranges are summarized in Table 21-3.
TABLE 21-3:
PLL FREQUENCY RANGE
The PLL features a lock output which is asserted when
the PLL enters a phase locked state. Should the loop
fall out of lock (e.g., due to noise), the lock signal is
rescinded. The state of this signal is reflected in the
read-only LOCK bit in the OSCCON register.
21.2.5
FAST RC OSCILLATOR (FRC)
The FRC oscillator is a fast (7.37 MHz, ±2% nominal),
internal RC oscillator. This oscillator is intended to
provide reasonable device operating speeds without
the use of an external crystal, ceramic resonator or RC
network. Using the x4, x8 and x16 PLL options, higher
operational frequencies can be generated.
The dsPIC30F operates from the FRC oscillator when-
ever the Current Oscillator Selection (COSC<1:0>)
control
bits
in
the
OSCCON
register
(OSCCON<13:12>) are set to ‘01’.
There are four tuning bits (TUN<3:0>) for the FRC
oscillator in the OSCCON register. These tuning bits
allow the FRC oscillator frequency to be adjusted as
close to 7.37 MHz as possible, depending on the
device operating conditions. The FRC oscillator
frequency has been calibrated during factory testing.
Table 21-4 describes the adjustment range of the
TUN<3:0> bits.
TABLE 21-4:
FRC TUNING
21.2.6
LOW-POWER RC OSCILLATOR (LPRC)
The LPRC oscillator is a component of the Watchdog
Timer (WDT) and oscillates at a nominal frequency of
512 kHz. The LPRC oscillator is the clock source for
the Power-up Timer (PWRT) circuit, WDT and clock
monitor circuits. It may also be used to provide a low-
frequency clock source option for applications where
power consumption is critical and timing accuracy is
not required.
The LPRC oscillator is always enabled at a POR
because it is the clock source for the PWRT. After the
PWRT expires, the LPRC oscillator remains on if one
of the following is true:
The Fail-Safe Clock Monitor is enabled
The WDT is enabled
The LPRC oscillator is selected as the system
clock via the COSC<1:0> control bits in the
OSCCON register
If one of the above conditions is not true, the LPRC
shuts off after the PWRT expires.
FIN
PLL
Multiplier
FOUT
4 MHz-10 MHz
x4
16 MHz-40 MHz
4 MHz-10 MHz
x8
32 MHz-80 MHz
4 MHz-7.5 MHz
x16
64 MHz-120 MHz
Note:
OSCTUN functionality has been provided
to
help
customers
compensate
for
temperature effects on the FRC frequency
over a wide range of temperatures. The
tuning step size is an approximation and is
neither characterized nor tested.
TUN<3:0>
Bits
FRC Frequency
0111
+10.5%
0110
+9.0%
0101
+7.5%
0100
+6.0%
0011
+4.5%
0010
+3.0%
0001
+1.5%
0000
Center Frequency (oscillator is
running at calibrated frequency)
1111
-1.5%
1110
-3.0%
1101
-4.5%
1100
-6.0%
1011
-7.5%
1010
-9.0%
1001
-10.5%
1000
-12.0%
Note 1: OSC2 pin function is determined by the
Primary
Oscillator
mode
selection
(FPR<3:0>).
2: Note that OSC1 pin cannot be used as an
I/O pin, even if the secondary oscillator or
an internal clock source is selected at all
times.
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