PIC17C44 Datasheet, PDF (63/241 Pages) Microchip Technology – High-Performance 8-Bit CMOS EPROM/ROM Microcontroller

PIC17C4X
TABLE 9-9: PORTE FUNCTIONS
Name
Bit
RE0/ALE
bit0
RE1/OE
bit1
RE2/WR
bit2
Legend: TTL = TTL input.
Buffer Type
TTL
TTL
TTL
Function
Input/Output or system bus Address Latch Enable (ALE) control pin.
Input/Output or system bus Output Enable (OE) control pin.
Input/Output or system bus Write (WR) control pin.
TABLE 9-10: REGISTERS/BITS ASSOCIATED WITH PORTE
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-on
Reset
Value on all
other resets
(Note1)
15h, Bank 1 PORTE
—
—
—
—
—
RE2/WR RE1/OE RE0/ALE ---- -xxx
14h, Bank 1 DDRE
Data direction register for PORTE
---- -111
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'. Shaded cells are not used by PORTE.
Note 1: Other (non power-up) resets include: external reset through MCLR and the Watchdog Timer Reset.
---- -uuu
---- -111
© 1996 Microchip Technology Inc.
DS30412C-page 63