
2003 Microchip Technology Inc.
DS30569B-page 41
PIC16F870/871
TABLE 4-9:
PORTE FUNCTIONS
TABLE 4-10:
SUMMARY OF REGISTERS ASSOCIATED WITH PORTE
Name
Bit#
Buffer Type
Function
RE0/RD/AN5
bit0
ST/TTL(1)
Input/output port pin or read control input in Parallel Slave Port mode or
analog input:
RD
1
= Not a read operation
0
= Read operation. Reads PORTD register (if chip selected.)
RE1/WR/AN6
bit1
ST/TTL(1)
Input/output port pin or write control input in Parallel Slave Port mode
or analog input:
WR
1
= Not a write operation
0
= Write operation. Writes PORTD register (if chip selected).
RE2/CS/AN7
bit2
ST/TTL(1)
Input/output port pin or chip select control input in Parallel Slave Port
mode or analog input:
CS
1
= Device is not selected
0
= Device is selected
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.
Addr
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on:
POR, BOR
Value on
all other
RESETS
09h
PORTE
—
—RE2
RE1
RE0
---- -xxx
---- -uuu
89h
TRISE
IBF
OBF
IBOV
PSPMODE
—
PORTE Data Direction Bits
0000 -111
9Fh
ADCON1
ADFM
—
PCFG3
PCFG2
PCFG1
PCFG0
--0- 0000
Legend:
x
= unknown, u = unchanged, - = unimplemented read as '0'. Shaded cells are not used by PORTE.