PIC24FJ128GA110-I/PT Microchip Technology, PIC24FJ128GA110-I/PT Datasheet - Page 159

• Manufacturer Part Number: PIC24FJ128GA110-I/PT
• Description: IC PIC MCU FLASH 100TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 24Fr

Specifications of PIC24FJ128GA110-I/PT

• Core Size: 16-Bit
• Program Memory Size: 128KB (43K x 24)
• Core Processor: PIC
• Speed: 32MHz
• Connectivity: I²C, PMP, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 85
• Program Memory Type: FLASH
• Ram Size: 16K 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
• Package / Case: 100-TFQFP
• Controller Family/series: PIC24
• No. Of I/o's: 85
• Ram Memory Size: 16KB
• Cpu Speed: 32MHz
• No. Of Timers: 5
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 876-1004 - PIC24 BREAKOUT BOARDMA240015 - BOARD MCV PIM FOR 24F256GADM240011 - KIT STARTER MPLAB FOR PIC24F MCU
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

EQUATION 13-2:
EXAMPLE 13-1:
TABLE 13-1:
TABLE 13-2:
© 2008 Microchip Technology Inc.
Timer Prescaler Ratio
Period Register Value
Resolution (bits)
Note 1:
Timer Prescaler Ratio
Period Register Value
Resolution (bits)
Note 1:
1. Find the Timer Period register value for a desired PWM frequency of 52.08 kHz, where F
2.
Note 1:
(32 MHz device clock rate) and a Timer2 prescaler setting of 1:1.
Find the maximum resolution of the duty cycle that can be used with a 52.08 kHz frequency and a 32 MHz device clock rate:
PWM Frequency
PWM Frequency
T
PWM Period = 1/PWM Frequency = 1/52.08 kHz = 19.2 μs
PWM Period = (PR2 + 1) • T
19.2 μs
PR2
PWM Resolution = log
CY
Based on F
Based on F
Based on T
= 2 * T
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 4 MIPS (F
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 16 MIPS (F
OSC
Maximum PWM Resolution (bits) =
Note 1: Based on F
= (PR2 + 1) • 62.5 ns • 1
= 306
CALCULATION FOR MAXIMUM PWM RESOLUTION
PWM PERIOD AND DUTY CYCLE CALCULATIONS
CY
CY
= 62.5 ns
CY
= (log
= 8.3 bits
= F
= F
= 2 * T
OSC
OSC
10
10
30.5 Hz
FFFFh
/2, Doze mode and PLL are disabled.
FFFFh
/2, Doze mode and PLL are disabled.
OSC
7.6 Hz
(F
(16 MHz/52.08 kHz)/log
16
16
CY
8
8
CY
; Doze mode and PLL are disabled.
/F
• (Timer 2 Prescale Value)
PWM
CY
)/log
= F
244 Hz
FFFFh
FFFFh
61 Hz
PIC24FJ256GA110 FAMILY
16
16
OSC
1
1
10
Preliminary
2) bits
/2, Doze mode and PLL are disabled.
log
10
10
122 Hz
488 Hz
7FFFh
7FFFh
2) bits
(
15
15
1
1
F
PWM
• (Timer Prescale Value)
log
3.9 kHz
977 Hz
0FFFh
0FFFh
10
12
12
F
1
1
CY
(2)
15.6 kHz
(1)
3.9 kHz
03FFh
03FFh
(1)
10
10
OSC
1
1
)
= 8 MHz with PLL
bits
31.3 kHz
125 kHz
007Fh
007Fh
CY
CY
1
7
1
7
DS39905B-page 157
= 4 MHz)
= 16 MHz)
125 kHz
500 kHz
001Fh
001Fh
(1)
1
5
1
5
(1)