DSPIC30F3014-20I/PT Microchip Technology, DSPIC30F3014-20I/PT Datasheet - Page 87

• Manufacturer Part Number: DSPIC30F3014-20I/PT
• Description: IC, DSC, 16BIT, 24KB 40MHZ, 5.5V, TQFP44
• Manufacturer: Microchip Technology
• Series: DsPIC30Fr

Specifications of DSPIC30F3014-20I/PT

• Core Frequency: 40MHz
• Core Supply Voltage: 5.5V
• Embedded Interface Type: I2C, SPI, UART
• No. Of I/o's: 30
• Flash Memory Size: 24KB
• Supply Voltage Range: 2.5V To 5.5V
• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 20 MIPS
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 30
• Program Memory Size: 24KB (8K x 24)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 2K x 8
• Voltage - Supply (vcc/vdd): 2.5 V ~ 5.5 V
• Data Converters: A/D 13x12b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Package: 44TQFP
• Device Core: dsPIC
• Family Name: dsPIC30
• Maximum Speed: 20 MHz
• Operating Supply Voltage: 3.3|5 V
• Data Bus Width: 16 Bit
• Number Of Programmable I/os: 30
• Interface Type: I2C/SPI/UART
• On-chip Adc: 13-chx12-bit
• Number Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: XLT80PT3 - SOCKET TRAN ICE 80MQFP/TQFPAC30F006 - MODULE SKT FOR DSPIC30F 44TQFPAC164305 - MODULE SKT FOR PM3 44TQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: DSPIC30F301420IPT

13.4.2
The PWM period is specified by writing to the PRx
register. The PWM period can be calculated using
Equation
EQUATION 13-1:
PWM frequency is defined as 1/[PWM period].
When the selected TMRx is equal to its respective
Period register, PRx, the following four events occur on
the next increment cycle:
• TMRx is cleared.
• The OCx pin is set.
• The PWM duty cycle is latched from OCxRS into
• The corresponding timer interrupt flag is set.
See
Timer3 is referred to in
FIGURE 13-2:
 2010 Microchip Technology Inc.
- Exception 1: If PWM duty cycle is 0x0000,
- Exception 2: If duty cycle is greater than PRx,
OCxR.
the OCx pin remains low.
the pin remains high.
Figure 13-2
PWM period = [(PRx) + 1] • 4 • T
13-1.
PWM PERIOD
for key PWM period comparisons.
OCxR = OCxRS
(Interrupt Flag)
TMR3 = PR3
T3IF = 1
(TMRx prescale value)
Figure 13-2
PWM OUTPUT TIMING
Duty Cycle
for clarity.
OSC
Period
TMR3 = Duty Cycle
•
(OCxR)
OCxR = OCxRS
(Interrupt Flag)
TMR3 = PR3
T3IF = 1
TMR3 = Duty Cycle
dsPIC30F3014/4013
(OCxR)
DS70138G-page 87