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
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)
1
= All output pins on PORTG slew at 0.1 the standard rate
0
= All output pins on PORTG slew at standard rate
bit 5
SLRF:
PORTF Slew Rate Control bit(1)
1
= All output pins on PORTF slew at 0.1 the standard rate
0
= RAll output pins on PORTF slew at standard rate
bit 4
SLRE:
PORTE Slew Rate Control bit(2)
1
= All output pins on PORTE slew at 0.1 the standard rate
0
= All output pins on PORTE slew at standard rate
bit 3
SLRD:
PORTD Slew Rate Control bit(2)
1
= All output pins on PORTD slew at 0.1 the standard rate
0
= All output pins on PORTD slew at standard rate
bit 2
SLRC:
PORTC Slew Rate Control bit(2)
1
= All output pins on PORTC slew at 0.1 the standard rate
0
= All output pins on PORTC slew at standard rate
bit 1
SLRB:
PORTB Slew Rate Control bit
1
= All output pins on PORTB slew at 0.1 the standard rate
0
= All output pins on PORTB slew at standard rate
bit 0
SLRA:
PORTA Slew Rate Control bit
1
= All output pins on PORTA slew at 0.1 the standard rate
0
= 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.
2:
These bits are unimplemented and read back as ‘0’ on 28-pin devices.
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