PIC16C63A/65B/73B/74B
REGISTER 5-1:
TRISE REGISTER (ADDRESS 89h)
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 is 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: Direction Control bit for pin RE2/CS/AN7
1= Input
0 = Output
bit 1
bit 0
TRISE1: Direction Control bit for pin RE1/WR/AN6
1= Input
0 = Output
TRISE0: Direction Control bit for pin RE0/RD/AN5
1= Input
0 = Output
Legend:
R = Readable bit
-n = Value at POR
W = Writable bit
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared x = Bit is unknown
’1’ = Bit is set
TABLE 5-10: SUMMARY OF REGISTERS ASSOCIATED WITH PORTE
Value on:
POR,
BOR
Value on
all other
RESETS
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
09h
89h
9Fh
PORTE
TRISE
—
IBF
—
—
OBF
—
—
—
—
—
—
RE2
RE1
RE0
---- -xxx ---- -uuu
0000 -111 0000 -111
IBOV PSPMODE
PORTE Data Direction bits
ADCON1
—
—
PCFG2 PCFG1 PCFG0 ---- -000 ---- -000
Legend: x= unknown, u= unchanged, -= unimplemented, read as '0'. Shaded cells are not used by PORTE.
DS30605C-page 36
2000 Microchip Technology Inc.
MICROCHIP [ MICROCHIP ]
