PIC18F258 MICROCHIP [Microchip Technology], PIC18F258 Datasheet - Page 105

• Manufacturer Part Number: PIC18F258
• Description: High Performance, 28/40-Pin Enhanced FLASH Microcontrollers with CAN
• Manufacturer: MICROCHIP [Microchip Technology]

REGISTER 9-1:
TABLE 9-9:
 2002 Microchip Technology Inc.
RE0/AN5/RD
RE1/AN6/WR/C1OUT
RE2/AN7/CS/C2OUT
Legend: ST = Schmitt Trigger input, TTL = TTL input
Note 1: Input buffers are Schmitt Triggers when in I/O mode and TTL buffers when in Parallel Slave Port mode.
Name
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
PORTE FUNCTIONS
TRISE REGISTER
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
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: RE2 Direction Control bit
1 = Input
0 = Output
TRISE1: RE1 Direction Control bit
1 = Input
0 = Output
TRISE0: RE0 Direction Control bit
1 = Input
0 = Output
bit 7
Legend:
R = Readable bit
- n = Value at POR
Bit#
bit0
bit1
bit2
R-0
IBF
(must be cleared in software)
Buffer Type
ST/TTL
ST/TTL
ST/TTL
OBF
R-0
(1)
(1)
(1)
Input/output port pin, analog input or read control input in Parallel
Slave Port mode.
Input/output port pin, analog input, write control input in Parallel Slave
Port mode or Comparator 1 output.
Input/output port pin, analog input, chip select control input in Parallel
Slave Port mode or Comparator 2 output.
R/W-0
IBOV
Preliminary
W = Writable bit
’1’ = Bit is set
PSPMODE
R/W-0
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
U-0
—
Function
TRISE2
R/W-1
PIC18FXX8
x = Bit is unknown
TRISE1
R/W-1
DS41159B-page 103
TRISE0
R/W-1
bit 0