PIC16C63A/65B/73B/74B
REGISTER 5-1:
TRISE REGISTER (ADDRESS 89h)
R-0
IBF
bit 7
bit 7
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
PSPMODE:
Parallel Slave Port Mode Select bit
1
= Parallel Slave Port mode
0 = General purpose I/O mode
Unimplemented:
Read as '0'
TRISE2:
Direction Control bit for pin RE2/CS/AN7
1
= Input
0 = Output
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
’1’ = Bit is set
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
x = Bit is unknown
R-0
OBF
R/W-0
IBOV
R/W-0
PSPMODE
U-0
—
R/W-1
TRISE2
R/W-1
TRISE1
R/W-1
TRISE0
bit 0
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
TABLE 5-10:
Address
09h
89h
9Fh
Name
PORTE
TRISE
SUMMARY OF REGISTERS ASSOCIATED WITH PORTE
Bit 7
—
IBF
—
Bit 6
—
OBF
—
Bit 5
—
IBOV
—
Bit 4
—
PSPMODE
—
Bit 3
—
—
—
Bit 2
RE2
Bit 1
RE1
Bit 0
RE0
Value on:
POR,
BOR
---- -xxx
0000 -111
---- -000
Value on
all other
RESETS
---- -uuu
0000 -111
---- -000
PORTE Data Direction bits
PCFG2
PCFG1
PCFG0
ADCON1
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 TECHNOLOGY ]
