PIC16F870_13 Datasheet, PDF (40/172 Pages) Microchip Technology – 28/40-Pin, 8-Bit CMOS FLASH Microcontrollers

PIC16F870/871
REGISTER 4-1: TRISE REGISTER (ADDRESS: 89h)
R-0
R-0
R/W-0
R/W-0
U-0
IBF
OBF
IBOV PSPMODE
—
bit 7
R/W-1
Bit2
R/W-1
Bit1
R/W-1
Bit0
bit 0
bit 7
Parallel Slave Port Status/Control Bits
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
bit 6
OBF: Output Buffer Full Status bit
1 = The output buffer still holds a previously written word
0 = The output buffer has been read
bit 5
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
Unimplemented: Read as '0'
PORTE Data Direction Bits
bit 2
Bit2: Direction Control bit for pin RE2/CS/AN7
1 = Input
0 = Output
bit 1
Bit1: Direction Control bit for pin RE1/WR/AN6
1 = Input
0 = Output
bit 0
Bit0: 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
DS30569C-page 40
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