PIC18F25K20T-ISS Datasheet, PDF (138/456 Pages) Microchip Technology – 28/40/44-Pin Flash Microcontrollers with nanoWatt XLP Technology

PIC18F2XK20/4XK20
10.8 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 10-4: SLRCON: SLEW RATE CONTROL REGISTER
U-0
—
bit 7
U-0
U-0
R/W-1
R/W-1
R/W-1
—
—
SLRE⁽¹⁾
SLRD⁽¹⁾
SLRC
R/W-1
SLRB
R/W-1
SLRA
bit 0
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
‘1’ = Bit is set
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
x = Bit is unknown
bit 7-5
bit 4
bit 3
bit 2
bit 1
bit 0
Unimplemented: Read as ‘0’
SLRE: PORTE Slew Rate Control bit⁽¹⁾
1 = All outputs on PORTE slew at a limited rate
0 = All outputs on PORTE slew at the standard rate
SLRD: PORTD Slew Rate Control bit⁽¹⁾
1 = All outputs on PORTD slew at a limited rate
0 = All outputs on PORTD slew at the standard rate
SLRC: PORTC Slew Rate Control bit
1 = All outputs on PORTC slew at a limited rate
0 = All outputs on PORTC slew at the standard rate
SLRB: PORTB Slew Rate Control bit
1 = All outputs on PORTB slew at a limited rate
0 = All outputs on PORTB slew at the standard rate
SLRA: PORTA Slew Rate Control bit
1 = All outputs on PORTA slew at a limited rate⁽²⁾
0 = All outputs on PORTA slew at the standard rate
Note 1: These bits are not implemented on PIC18F2XK20 devices.
2: The slew rate of RA6 defaults to standard rate when the pin is used as CLKOUT.
DS41303G-page 138
 2010 Microchip Technology Inc.