參數(shù)資料
型號: P87C557E8
廠商: NXP Semiconductors N.V.
元件分類: 8位微控制器
英文描述: 8 BIT MICROCONTROLLER
中文描述: 8位微控制器
文件頁數(shù): 70/84頁
文件大?。?/td> 322K
代理商: P87C557E8
1999 Mar 12
70
Philips Semiconductors
Product specification
8-bit microcontroller
P8xC557E8
handbook, full pagewidth
MGA180
P1 P2
S1
P1 P2
S2
P1 P2
S3
P1 P2
S4
P1 P2
S5
P1 P2
S6
P1 P2
S1
P1 P2
S2
P1 P2
S3
P1 P2
S4
P1 P2
S5
P1 P2
S6
one machine cycle
one machine cycle
XTAL1
INPUT
address
A0 - A7
inst.
in
address
A0 - A7
inst.
in
address
A0 - A7
inst.
in
address
A0 - A7
inst.
in
address A8 - A15
address A8 - A15
address A8 - A15
address A8 - A15
address
A0 - A7
inst.
in
address
A0 - A7
inst.
in
address
A0 - A7
data output or data input
address A8 - A15
address A8 - A15 or Port 2 out
address A8 - A15
old data
new data
sampling time of I/O port pins during input (including INT0 and INT1)
SERIAL
PORT
CLOCK
PORT
INPUT
PORT
OUTPUT
PORT 2
BUS
(PORT 0)
read or
write of
external data
memory
PORT 2
BUS
(PORT 0)
external
program
memory
fetch
WR
RD
only active
during a write
to external
data memory
only active
during a read
from external
data memory
PSEN
ALE
dotted lines
are valid when
RD or WR are
active
Fig.26 Instruction cycle timing.
The Port 5 input buffers have a maximum propagation delay of 300 ns.
As a result Port 5 sample time begins 300 ns before state S5 and ends when S5 has finished.
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