DSPIC30F4011T-30I/PT Microchip Technology, DSPIC30F4011T-30I/PT Datasheet - Page 87

• Manufacturer Part Number: DSPIC30F4011T-30I/PT
• Description: IC,DSP,16-BIT,CMOS,TQFP,44PIN,PLASTIC
• Manufacturer: Microchip Technology
• Series: dsPIC™ 30Fr

Specifications of DSPIC30F4011T-30I/PT

• Rohs Compliant: YES
• Core Processor: dsPIC
• Core Size: 16-Bit
• Speed: 30 MIPs
• Connectivity: CAN, I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, Motor Control PWM, QEI, POR, PWM, WDT
• Number Of I /o: 30
• Program Memory Size: 48KB (16K 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 9x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 44-TQFP, 44-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: AC30F006 - MODULE SKT FOR DSPIC30F 44TQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Other names: DSPIC30F4011T30IP

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 the figure for clarity.
FIGURE 13-1:
© 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 will remain low.
the pin will remain high.
Figure 13-1
PWM period = [(PRx) + 1] • 4 • T
13-1.
PWM PERIOD
for key PWM period comparisons.
OCxR = OCxRS
(Interrupt Flag)
TMR3 = PR3
T3IF = 1
PWM PERIOD
(TMR
PWM OUTPUT TIMING
X
prescale value)
Duty Cycle
OSC
TMR3 = Duty Cycle (OCxR)
Period
•
OCxR = OCxRS
(Interrupt Flag)
TMR3 = PR3
T3IF = 1
TMR3 = Duty Cycle (OCxR)
dsPIC30F4011/4012
DS70135G-page 87