PIC18F24J11 MICROCHIP [Microchip Technology], PIC18F24J11 Datasheet - Page 148
PIC18F24J11
Manufacturer Part Number
PIC18F24J11
Description
28/44-Pin, Low-Power, High-Performance USB Microcontrollers with nanoWatt XLP Technology
Manufacturer
MICROCHIP [Microchip Technology]
Datasheet
1.PIC18F24J11.pdf
(536 pages)
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PIC18F46J11 FAMILY
10.6
Depending on the particular PIC18F46J11 family
device selected, PORTE is implemented in two
different ways.
For 44-pin devices, PORTE is a 3-bit wide port. Three
pins (RE0/AN5/PMRD, RE1/AN6/PMWR and RE2/
AN7/PMCS) are individually configurable as inputs or
outputs. These pins have Schmitt Trigger input buffers.
When selected as analog inputs, these pins will read as
‘0’s.
The corresponding Data Direction register is TRISE.
Setting a TRISE bit (= 1) will make the corresponding
PORTE pin an input (i.e., put the corresponding output
driver in a high-impedance mode). Clearing a TRISE bit
(= 0) will make the corresponding PORTE pin an output
(i.e., put the contents of the output latch on the selected
pin).
TRISE controls the direction of the RE pins, even when
they are being used as analog inputs. The user must
make sure to keep the pins configured as inputs when
using them as analog inputs.
DS39932D-page 148
Note:
Note:
PORTE, TRISE and LATE
Registers
PORTE is available only in 44-pin
devices.
On a POR, RE<2:0> are configured as
analog inputs.
The Data Latch register (LATE) is also memory
mapped. Read-modify-write operations on the LATE
register read and write the latched output value for
PORTE.
EXAMPLE 10-6:
Each of the PORTE pins has a weak internal pull-up. A
single control bit can turn on all the pull-ups. This is per-
formed by setting bit, REPU (PORTE<6>). The weak
pull-up is automatically turned off when the port pin is
configured as an output. The pull-ups are disabled on a
POR.
Note that the pull-ups can be used for any set of
features, similar to the pull-ups found on PORTB.
CLRF
MOVLW
MOVWF
MOVLW
MOVWF
LATE
0xE0
ANCON0
0x03
TRISE
INITIALIZING PORTE
2011 Microchip Technology Inc.
; Initialize LATE
; to clear output
; data latches
; Configure REx
; for digital inputs
; Value used to
; initialize data
; direction
; Set RE<0> as inputs
; RE<1> as outputs
; RE<2> as inputs
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