PIC24FJ64GA004-I/PT Microchip Technology Inc., PIC24FJ64GA004-I/PT Datasheet - Page 131

• Manufacturer Part Number: PIC24FJ64GA004-I/PT
• Description: MCU, 16-Bit, 44-Pin, 64KB Flash, 8KB RAM, 35 I/O, Nanowatt
• Manufacturer: Microchip Technology Inc.

Specifications of PIC24FJ64GA004-I/PT

• A/d Inputs: 13 Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 16 MIPS
• Eeprom Memory: 0 Bytes
• Input Output: 35
• Interface: I2C/SPI/UART
• Memory Capacity: 64 Kbytes
• Memory Type: Flash
• Number Of Bits: 16
• Number Of Inputs: 35
• Number Of Pins: 44
• Package Type: 44-pin TQFP
• Programmable Memory: 64K Bytes
• Ram Size: 8K Bytes
• Speed: 32 MHz
• Timers: 5-16-bit
• Voltage, Range: 2-3.6 V
• Voltage, Rating: 2-3.6 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

EXAMPLE 13-1:
TABLE 13-1:
TABLE 13-2:
© 2007 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:
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 T
Based on T
Based on T
= T
CY
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 4 MIPS (F
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 16 MIPS (F
/2 = 62.5 ns
PWM PERIOD AND DUTY CYCLE CALCULATIONS
= (PR2 + 1) • 62.5 ns • 1
= 306
CY
CY
CY
=
= T
= T
= (log
= 8.3 bits
T
CY
CY
CY
/2; Doze mode and PLL are disabled.
/2; Doze mode and PLL are disabled.
/2; Doze mode and PLL are disabled.
10
10
30.5 Hz
FFFFh
FFFFh
7.6 Hz
(F
(16 MHz/52.08 kHz)/log
16
16
CY
8
8
CY
/F
• (Timer 2 Prescale Value)
PWM
)/log
244 Hz
FFFFh
FFFFh
61 Hz
16
16
1
1
10
PIC24FJ64GA004 FAMILY
Preliminary
2) bits
10
122 Hz
488 Hz
7FFFh
7FFFh
2) bits
15
15
1
1
3.9 kHz
977 Hz
0FFFh
0FFFh
12
12
1
1
15.6 kHz
(1)
3.9 kHz
03FFh
03FFh
10
10
1
1
OSC
= 8 MHz with PLL (32 MHz
31.3 kHz
125 kHz
007Fh
007Fh
CY
1
7
CY
1
7
DS39881B-page 129
= 4 MHz)
= 16 MHz)
125 kHz
500 kHz
001Fh
001Fh
(1)
1
5
1
5
(1)