PIC16F7X7 datasheet(71/276 Pages) MICROCHIP

71 / 276 page

 2004 Microchip Technology Inc.

DS30498C-page 69

PIC16F7X7

TRISE REGISTER (ADDRESS 89h)

R-0

R/W-0

U-0

R/W-1

IBF

OBF

IBOV

PSPMODE

—(1)

TRISE2

TRISE1

TRISE0

bit 7

bit 0

bit 7

Parallel Slave Port Status/Control bits:

IBF: Input Buffer Full Status bit

= A word has been received and is waiting to be read by the CPU

= No word has been received

bit 6

OBF: Output Buffer Full Status bit

= The output buffer still holds a previously written word

= The output buffer has been read

bit 5

IBOV: Input Buffer Overflow Detect bit (in Microprocessor mode)

= A write occurred when a previously input word has not been read (must be cleared in

software)

= No overflow occurred

bit 4

PSPMODE: Parallel Slave Port Mode Select bit

= Parallel Slave Port mode

= General Purpose I/O mode

bit 3

Unimplemented: Read as ‘1’(1)

Note 1: RE3 is an input only. The state of the TRISE3 bit has no effect and will always read ‘1’.

bit 2

PORTE Data Direction bits:

TRISE2: Direction Control bit for pin RE2/CS/AN7

= Input

= Output

bit 1

TRISE1: Direction Control bit for pin RE1/WR/AN6

= Input

= Output

bit 0

TRISE0: Direction Control bit for pin RE0/RD/AN5

= Input

= Output

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

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