PIC18LF66K80-I/PT【PDF 84/351 页】MCU PIC ECAN 64KB FLASH 64TQFP

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Sheet目录3841

80页 81页 82页 83页 [84页]85页 86页 87页 88页

PIC18F66K80 FAMILY

DS39977F-page 174

2010-2012 Microchip Technology Inc.

11.1.4

ANALOG AND DIGITAL PORTS

Many of the ports multiplex analog and digital function-

ality, providing a lot of flexibility for hardware designers.

PIC18F66K80 family devices can make any analog pin

analog or digital, depending on an application’s needs.

The ports’ analog/digital functionality is controlled by

the registers: ANCON0 and ANCON1.

Setting these registers makes the corresponding pins

analog and clearing the registers makes the ports digi-

tal. For details on these registers, see Section 23.0

“12-Bit Analog-to-Digital Converter (A/D) Module”

11.1.5

PORT SLEW RATE

The output slew rate of each port is programmable to

select either the standard transition rate, or a reduced

transition rate of ten percent of the standard transition

time, to minimize EMI. The reduced transition time is

the default slew rate for all ports.

REGISTER 11-4:

SLRCON: SLEW RATE CONTROL REGISTER

U-0

R/W-0

—SLRG(1)

SLRF(1)

SLRE(2)

SLRD(2)

SLRC(2)

SLRB

SLRA

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 7

Unimplemented:

Read as ‘0’

bit 6

SLRG:

PORTG Slew Rate Control bit(1)

= All output pins on PORTG slew at 0.1 the standard rate

= All output pins on PORTG slew at standard rate

bit 5

SLRF:

PORTF Slew Rate Control bit(1)

= All output pins on PORTF slew at 0.1 the standard rate

= RAll output pins on PORTF slew at standard rate

bit 4

SLRE:

PORTE Slew Rate Control bit(2)

= All output pins on PORTE slew at 0.1 the standard rate

= All output pins on PORTE slew at standard rate

bit 3

SLRD:

PORTD Slew Rate Control bit(2)

= All output pins on PORTD slew at 0.1 the standard rate

= All output pins on PORTD slew at standard rate

bit 2

SLRC:

PORTC Slew Rate Control bit(2)

= All output pins on PORTC slew at 0.1 the standard rate

= All output pins on PORTC slew at standard rate

bit 1

SLRB:

PORTB Slew Rate Control bit

= All output pins on PORTB slew at 0.1 the standard rate

= All output pins on PORTB slew at standard rate

bit 0

SLRA:

PORTA Slew Rate Control bit

= All output pins on PORTA slew at 0.1 the standard rate

= All output pins on PORTA slew at standard rate

Note 1:

These bits are unimplemented and read back as ‘0’ on 28-pin and 40/44-pin devices.

These bits are unimplemented and read back as ‘0’ on 28-pin devices.

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