PIC16F870_13 Datasheet, PDF (41/172 Pages) Microchip Technology – 28/40-Pin, 8-Bit CMOS FLASH Microcontrollers

PIC16F870/871
TABLE 4-9: PORTE FUNCTIONS
Name
Bit# Buffer Type
Function
RE0/RD/AN5
RE1/WR/AN6
RE2/CS/AN7
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.)
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).
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.
TABLE 4-10: SUMMARY OF REGISTERS ASSOCIATED WITH PORTE
Addr Name Bit 7 Bit 6 Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on:
POR, BOR
09h PORTE
—
—
—
—
—
RE2
RE1
RE0 ---- -xxx
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.
Value on
all other
RESETS
---- -uuu
0000 -111
--0- 0000
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DS30569C-page 41