
PIC18F/LF1XK50
DS41350E-page 100
Preliminary
2010 Microchip Technology Inc.
9.5
Port Slew Rate Control
The output slew rate of each port is programmable to
select either the standard transition rate or a reduced
transition rate of 0.1 times the standard to minimize
EMI. The reduced transition time is the default slew
rate for all ports.
REGISTER 9-17:
SLRCON: SLEW RATE CONTROL REGISTER
U-0
R/W-1
—
SLRC
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 7-3
Unimplemented: Read as ‘0’
bit 2
SLRC: PORTC Slew Rate Control bit
1
= All outputs on PORTC slew at 0.1 times the standard rate
0
= All outputs on PORTC slew at the standard rate
bit 1
SLRB: PORTB Slew Rate Control bit
1
= All outputs on PORTB slew at 0.1 times the standard rate
0
= All outputs on PORTB slew at the standard rate
bit 0
SLRA: PORTA Slew Rate Control bit
1
= All outputs on PORTA slew at 0.1 times the standard rate(1)
0
= All outputs on PORTA slew at the standard rate
Note 1: The slew rate of RA4 defaults to standard rate when the pin is used as CLKOUT.