PIC24FJ64GA006-I/PT Microchip Technology, PIC24FJ64GA006-I/PT Datasheet - Page 117

• Manufacturer Part Number: PIC24FJ64GA006-I/PT
• Description: IC PIC MCU FLASH 32KX16 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 24Fr

Specifications of PIC24FJ64GA006-I/PT

• Program Memory Type: FLASH
• Program Memory Size: 64KB (22K x 24)
• Package / Case: 64-TFQFP
• Core Processor: PIC
• Core Size: 16-Bit
• Speed: 16MHz
• Connectivity: I²C, PMP, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 53
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 2 V ~ 3.6 V
• Data Converters: A/D 16x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: PIC24FJ
• Core: PIC
• Data Bus Width: 16 bit
• Data Ram Size: 8 KB
• Interface Type: I2C/SPI/UART
• Maximum Clock Frequency: 32 MHz
• Number Of Programmable I/os: 53
• Number Of Timers: 5
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: 52713-733, 52714-737, 53276-922, EWDSPIC
• Development Tools By Supplier: PG164130, DV164035, DV244005, DV164005, PG164120, DM240011, DV164033, MA240013, AC164127, DM240001
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 16-ch x 10-bit
• Controller Family/series: PIC24
• No. Of I/o's: 53
• Ram Memory Size: 8KB
• Cpu Speed: 32MHz
• No. Of Timers: 5
• Embedded Interface Type: I2C, SPI, UART
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: DM240011 - KIT STARTER MPLAB FOR PIC24F MCUDV164033 - KIT START EXPLORER 16 MPLAB ICD2MA160011 - DAUGHTER BOARD PICDEM LCD 16F91XDM240001 - BOARD DEMO PIC24/DSPIC33/PIC32AC164327 - MODULE SKT FOR 64TQFP
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

13.4
The following steps should be taken when configuring
the output compare module for PWM operation:
1.
2.
3.
4.
5.
6.
13.4.1
The PWM period is specified by writing to PRy, the
Timer Period register. The PWM period can be
calculated using Equation 13-1.
EQUATION 13-2:
© 2009 Microchip Technology Inc.
Note:
Set the PWM period by writing to the selected
Timer Period register (PRy).
Set the PWM duty cycle by writing to the OCxRS
register.
Write the OCxR register with the initial duty
cycle.
Enable interrupts, if required, for the timer and
output compare modules. The output compare
interrupt is required for PWM Fault pin
utilization.
Configure the output compare module for one of
two PWM operation modes by writing to the
Output
(OCxCON<2:0>).
Set the TMRy prescale value and enable the
time base by setting TON (TxCON<15>) = 1.
Pulse-Width Modulation Mode
The OCxR register should be initialized
before the output compare module is first
enabled. The OCxR register becomes a
Read-Only Duty Cycle register when the
module is operated in the PWM modes.
The value held in OCxR will become the
PWM duty cycle for the first PWM period.
The contents of the Duty Cycle Buffer
register, OCxRS, will not be transferred
into OCxR until a time base period match
occurs.
PWM PERIOD
Compare
Maximum PWM Resolution (bits) =
Note 1: Based on F
CALCULATION FOR MAXIMUM PWM RESOLUTION
mode
bits
OCM<2:0>
CY
= F
PIC24FJ128GA010 FAMILY
OSC
/2, Doze mode and PLL are disabled.
log
10
(
F
PWM
EQUATION 13-1:
13.4.2
The PWM duty cycle is specified by writing to the
OCxRS register. The OCxRS register can be written to
at any time, but the duty cycle value is not latched into
OCxR until a match between PRy and TMRy occurs
(i.e., the period is complete). This provides a double
buffer for the PWM duty cycle and is essential for glitch-
less PWM operation. In the PWM mode, OCxR is a
read-only register.
Some important boundary parameters of the PWM duty
cycle include:
• If the Duty Cycle register, OCxR, is loaded with
• If OCxR is greater than PRy (Timer Period register),
• If OCxR is equal to PRy, the OCx pin will be low
See Example 13-1 for PWM mode timing details.
Table 13-1 shows example PWM frequencies and
resolutions for a device operating at 10 MIPS.
PWM Period = [(PRy) + 1] • T
where:
Note 1: Based on T
0000h, the OCx pin will remain low (0% duty cycle).
the pin will remain high (100% duty cycle).
for one time base count value and high for all
other count values.
Note:
PWM Frequency = 1/[PWM Period]
• (Timer Prescale Value)
log
10
F
(2)
PLL are disabled.
PWM DUTY CYCLE
CY
A PRy value of N will produce a PWM
period of N + 1 time base count cycles. For
example, a value of 7 written into the PRy
register will yield a period consisting of
8 time base cycles.
(1)
CY
CALCULATING THE PWM
PERIOD
= T
)
OSC
CY
bits
• (Timer Prescale Value)
(1)
* 2, Doze mode and
DS39747E-page 117