PIC17C42 Microchip Technology, PIC17C42 Datasheet - Page 63
PIC17C42
Manufacturer Part Number
PIC17C42
Description
High-Performance 8-Bit CMOS EPROM/ROM Microcontroller
Manufacturer
Microchip Technology
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TABLE 9-9:
TABLE 9-10:
Address
Name
RE0/ALE
RE1/OE
RE2/WR
Legend: TTL = TTL input.
15h, Bank 1
14h, Bank 1
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.
1996 Microchip Technology Inc.
Name
PORTE
DDRE
PORTE FUNCTIONS
REGISTERS/BITS ASSOCIATED WITH PORTE
bit0
bit1
bit2
Data direction register for PORTE
Bit
Bit 7
—
Buffer Type
Bit 6
—
TTL
TTL
TTL
Bit 5
—
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.
Bit 4
—
Bit 3
—
RE2/WR
Bit 2
Function
RE1/OE
Bit 1
RE0/ALE
Bit 0
PIC17C4X
---- -xxx
---- -111
Power-on
Value on
Reset
DS30412C-page 63
other resets
Value on all
---- -uuu
---- -111
(Note1)
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