PIC18CXX2
Register 8-1: TRISE Register
R-0
IBF
R-0
R/W-0
IBOV
R/W-0
U-0
R/W-1
R/W-1
R/W-1
OBF
PSPMODE
—
TRISE2
TRISE1
TRISE0
bit 7
bit 0
bit 7
bit 6
bit 5
IBF: Input Buffer Full Status bit
1= A word has been received and waiting to be read by the CPU
0= No word has been received
OBF: Output Buffer Full Status bit
1= The output buffer still holds a previously written word
0= The output buffer has been read
IBOV: Input Buffer Overflow Detect bit (in microprocessor mode)
1= A write occurred when a previously input word has not been read
(must be cleared in software)
0= No overflow occurred
bit 4
PSPMODE: Parallel Slave Port Mode Select bit
1= Parallel slave port mode
0= General purpose I/O mode
bit 3
bit 2
Unimplemented: Read as ’0’
TRISE2: RE2 direction control bit
1= Input
0= Output
bit 1
bit 0
TRISE1: RE1 direction control bit
1= Input
0= Output
TRISE0: RE0 direction control bit
1= Input
0= Output
Legend:
R = Readable bit
W = Writable bit
U = Unimplemented bit, read as ‘0’
- n = Value at POR reset
DS39026B-page 88
Preliminary
7/99 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
