PIC16F7X
TABLE 4-9:
PORTE FUNCTIONS
Name
Bit#
Buffer Type
Function
ST/TTL(1)
Input/output port pin or read control input in Parallel Slave Port mode or
analog input.
RE0/RD/AN5
bit0
For RD (PSP mode):
1= IDLE
0= Read operation. Contents of PORTD register output to PORTD I/O
pins (if chip selected).
Input/output port pin or write control input in Parallel Slave Port mode
or analog input.
For WR (PSP mode):
1= IDLE
RE1/WR/AN6
RE2/CS/AN7
bit1
bit2
ST/TTL(1)
0= Write operation. Value of PORTD I/O pins latched into PORTD
register (if chip selected).
ST/TTL(1)
Input/output port pin or chip select control input in Parallel Slave Port
mode or analog input.
For CS (PSP mode):
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.
TABLE 4-10: SUMMARY OF REGISTERS ASSOCIATED WITH PORTE
Value on:
POR,
Value on all
Addr
Name
Bit 7
Bit 6 Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
other
BOR
RESETS
09h
89h
9Fh
PORTE
TRISE
—
IBF
—
—
—
—
—
—
—
RE2
RE1
RE0
---- -xxx
0000 -111
---- -uuu
0000 -111
---- -000
OBF IBOV PSPMODE
PORTE Data Direction bits
ADCON1
—
—
—
PCFG2 PCFG1 PCFG0 ---- -000
Legend: x= unknown, u= unchanged, -= unimplemented, read as '0'. Shaded cells are not used by PORTE.
2002 Microchip Technology Inc.
DS30325B-page 39
MICROCHIP [ MICROCHIP ]
