PIC17C42AT View Datasheet(PDF) - Microchip Technology

Part Name

Description

Manufacturer

PIC17C42AT

High-Performance 8-Bit CMOS EPROM/ROM Microcontroller

Microchip Technology 

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

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