Microchip Technology IC MCU OTP 2KX PIC17C42A-16/P DIP-40 MCP PIC17C42A-16/P 数据表
产品代码
PIC17C42A-16/P
1996 Microchip Technology Inc.
DS30412C-page 63
PIC17C4X
TABLE 9-9:
PORTE FUNCTIONS
TABLE 9-10:
REGISTERS/BITS ASSOCIATED WITH PORTE
Name
Bit
Buffer Type
Function
RE0/ALE
bit0
TTL
Input/Output or system bus Address Latch Enable (ALE) control pin.
RE1/OE
bit1
TTL
Input/Output or system bus Output Enable (OE) control pin.
RE2/WR
bit2
TTL
Input/Output or system bus Write (WR) control pin.
Legend: TTL = TTL input.
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
---- -uuu
14h, Bank 1
DDRE
Data direction register for PORTE
---- -111
---- -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.