PIC16F722AT-ISLASHSP datasheet(74/284 Pages) MICROCHIP

74 / 284 page

PIC16F/LF722A/723A

DS41417A-page 74

 2010 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 6-4:

SUMMARY OF REGISTERS ASSOCIATED WITH PORTE

PORTE: PORTE REGISTER

U-0

R-x

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’

TRISE: PORTE TRI-STATE REGISTER

U-0

R-1

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

Value on

POR, BOR

Value on

all other

Resets

PORTE

————

RE3

—

---- x---

TRISE

—

—TRISE3(1)

—

---- 1---

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.

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