Datasheet

PIC16(L)F1782/3
DS41579D-page 136 Preliminary  2011-2012 Microchip Technology Inc.
13.9 PORTE Registers
RE3 is input only, and also functions as MCLR. The
MCLR
feature can be disabled via a configuration fuse.
RE3 also supplies the programming voltage. The TRIS bit
for RE3 (TRISE3) always reads ‘1’.
13.9.1 INPUT THRESHOLD CONTROL
The INLVLE register (Register 13-28) controls the input
voltage threshold for each of the available PORTE
input pins. A selection between the Schmitt Trigger
CMOS or the TTL Compatible thresholds is available.
The input threshold is important in determining the
value of a read of the PORTE register and also the level
at which an interrupt-on-change occurs, if that feature
is enabled. See Section 30.1 “DC Characteristics:
PIC16(L)F1782/3-I/E (Industrial, Extended)” for more
information on threshold levels.
13.9.2 PORTE FUNCTIONS AND OUTPUT
PRIORITIES
No output priorities, RE3 is an input only pin.
Note: Changing the input threshold selection
should be performed while all peripheral
modules are disabled. Changing the
threshold level during the time a module is
active may inadvertently generate a
transition associated with an input pin,
regardless of the actual voltage level on
that pin.
REGISTER 13-25: PORTE: PORTE REGISTER
U-0 U-0 U-0 U-0 R-x/u U-0 U-0 U-0
— — — —
RE3
— — —
bit 7 bit 0
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
u = Bit is unchanged x = Bit is unknown -n/n = Value at POR and BOR/Value at all other Resets
‘1’ = Bit is set ‘0’ = Bit is cleared
bit 7-4 Unimplemented: Read as ‘0’
bit 3 RE3: PORTE Input Pin bit
1 = Port pin is > V
IH
0 = Port pin is < VIL
bit 2-0 Unimplemented: Read as ‘0’