MCP39F511 datasheet(45/62 Pages) MICROCHIP

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 2015 Microchip Technology Inc.

DS20005393B-page 45

MCP39F511

TABLE 8-2:

EXAMPLE PWM FREQUENCIES AND RESOLUTIONS

WITH PWM_TIMER_FREQ = 16 MHz (DEFAULT)

PWM Frequency

1.95 kHz

31.25 kHz

62.5 kHz

125 kHz

2.67 MHz

4 MHz

Timer Prescaler

111

PWM Frequency Value

FFh

7Fh

3Fh

02h

01h

Maximum Resolution (bits)

PWM PERIOD REGISTER

R/W-0

R/W-1

PWM_P<7:0>

bit 15

bit 8

U-0

R/W-0

—

—PRE<1:0>

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 15-8

PWM_P<7:0>:

8-bit PWM period value

bit 7-2

Unimplemented:

Read as ‘0‘

bit 1-0

PRE<1:0>:

PWM Prescaler

= Unused

= 1:16

= 1:4

= 1:1 (Default)

PWM DUTY-CYCLE REGISTER

R/W-0

R/W-1

R/W-0

DUTY<9:2>

bit 15

bit 8

U-0

R/W-0

—

DUTY<1:0>

bit 7

bit 0

Legend:

R = Readable bit

W = Writable bit

U = Unimplemented bit, read as ‘0’

-n = Value at POR

‘1’ = Bit is set

‘0’ = Bit is cleared

x = Bit is unknown

bit 15-8

DUTY<9:2>:

Upper 8 bits of 10-bit duty-cycle value

bit 7-2

Unimplemented:

Read as ‘0‘

bit 1-0

DUTY<1:0>:

Lower 2 bits of 10-bit duty-cycle value

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