Datasheet

PIC16(L)F722A/723A
DS41417B-page 74  2010-2012 Microchip Technology Inc.
6.5 PORTE and TRISE Registers
PORTE
(1)
is an 1-bit wide, input only port. RE3 is input
only and its TRIS bit will always read as ‘1’.
Reading the PORTE register (Register 6-12) reads the
status of the pins. RE3 reads ‘0’ when MCLRE = 1.
TABLE 6-5: SUMMARY OF REGISTERS ASSOCIATED WITH PORTE
REGISTER 6-12: PORTE: PORTE REGISTER
U-0 U-0 U-0 U-0 R-x U-0 U-0 U-0
— — — —
RE3
— — —
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 7-4 Unimplemented: Read as ‘0’
bit 3 RE3: PORTE I/O Pin bits
(1)
1 = Port pin is > VIH
0 = Port pin is < VIL
bit 2-0 Unimplemented: Read as ‘0’
REGISTER 6-13: TRISE: PORTE TRI-STATE REGISTER
U-0 U-0 U-0 U-0 R-1 U-0 U-0 U-0
— — — —
TRISE3
— — —
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 7-4 Unimplemented: Read as ‘0’
bit 3 TRISE3: RE3 Port Tri-state Control bit
This bit is always ‘1’ as RE3 is an input only
bit 2-0 Unimplemented: Read as ‘0’
Name Bit 7 Bit 6 Bit 5 Bit 4 Bit 3 Bit 2 Bit 1 Bit 0
Register on
Page
PORTE———— RE3 — — — 74
TRISE
— — — — TRISE3
(1)
— — — 74
Legend: x = unknown, u = unchanged, – = unimplemented locations read as ‘0’. Shaded cells are not used by
PORTE
Note 1: This bit is always ‘1’ as RE3 is input only.