PIC18F45K20T-I/MV Microchip Technology, PIC18F45K20T-I/MV Datasheet - Page 151

• Manufacturer Part Number: PIC18F45K20T-I/MV
• Description: 32KB, Flash, 1536bytes-RAM, 36I/O, 8-bit Family,nanowatt XLP 40 UQFN 5x5x0.5mm T
• Manufacturer: Microchip Technology
• Series: PIC® XLP™ 18Fr

Specifications of PIC18F45K20T-I/MV

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 64MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, HLVD, POR, PWM, WDT
• Number Of I /o: 35
• Program Memory Size: 32KB (16K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 256 x 8
• Ram Size: 1.5K x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Data Converters: A/D 14x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-UFQFN Exposed Pad
• Processor Series: PIC18
• Core: PIC18F
• Data Bus Width: 8 bit
• Data Ram Size: 512 B
• Interface Type: I2C, SPI, SCI, USB, MSSP, RJ11
• Maximum Clock Frequency: 64 MHz
• Number Of Programmable I/os: 35
• Number Of Timers: 4
• Operating Supply Voltage: 1.8 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: MPLAB Integrated Development Environment
• Minimum Operating Temperature: - 40 C
• Operating Temperature Range: - 40 C to + 85 C
• Supply Current (max): 14 uA
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant

11.4.3
The resolution determines the number of available duty
cycles for a given period. For example, a 10-bit resolution
will result in 1024 discrete duty cycles, whereas an 8-bit
resolution will result in 256 discrete duty cycles.
The maximum PWM resolution is 10 bits when PR2 is
255. The resolution is a function of the PR2 register
value as shown by Equation 11-4.
TABLE 11-4:
TABLE 11-5:
TABLE 11-6:
 2010 Microchip Technology Inc.
Timer Prescaler (1, 4, 16)
PR2 Value
Maximum Resolution (bits)
Timer Prescale (1, 4, 16)
PR2 Value
Maximum Resolution (bits)
Timer Prescale (1, 4, 16)
PR2 Value
Maximum Resolution (bits)
PWM Frequency
PWM Frequency
PWM Frequency
PWM RESOLUTION
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS AT 40 MHz
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS (F
EXAMPLE PWM FREQUENCIES AND RESOLUTIONS (F
1.22 kHz
1.22 kHz
2.44 kHz
0xFF
0x65
16
10
16
FFh
8
16
10
4.88 kHz
4.90 kHz
9.77 kHz
0xFF
0x65
FFh
10
10
4
4
8
4
39.06 kHz
19.53 kHz
19.61 kHz
EQUATION 11-4:
PIC18F2XK20/4XK20
Note:
0xFF
0x65
FFh
10
10
1
1
1
8
Resolution
If the pulse width value is greater than the
period the assigned PWM pin(s) will
remain unchanged.
156.25 kHz
78.12 kHz
76.92 kHz
3Fh
0x3F
0x19
1
8
1
8
1
6
OSC
OSC
=
PWM RESOLUTION
log
----------------------------------------- - bits
= 20 MHz)
= 8 MHz)

312.50 kHz
4 PR2
153.85 kHz
log
156.3 kHz

1Fh
0x0C
0x1F
2  
1
7
1
7
1
5
+
DS41303G-page 151
1


416.67 kHz
208.3 kHz
200.0 kHz
6.58
0x17
0x09
17h
6.6
1
1
1
5