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P83C528FBA датащи(PDF) 16 Page - NXP Semiconductors

номер детали P83C528FBA
подробное описание детали  CMOS single-chip 8-bit microcontroller
PDF  26 Pages
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производитель  PHILIPS [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

P83C528FBA датащи(HTML) 16 Page - NXP Semiconductors

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Philips Semiconductors
Product specification
80C528/83C528
CMOS single-chip 8-bit microcontrollers
1995 Feb 02
16
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has five characters. The
first character is always ‘t’ (= time). The other
characters, depending on their positions,
indicate the name of a signal or the logical
status of that signal. The designations are:
A – Address
C – Clock
D – Input data
H – Logic level high
I – Instruction (program memory contents)
L – Logic level low, or ALE
P – PSEN
Q – Output data
R – RD signal
t – Time
V – Valid
W – WR signal
X – No longer a valid logic level
Z – Float
Examples: tAVLL = Time for address valid
to ALE low.
tLLPL = Time for ALE low to
PSEN low.
tPXIZ
Figure 1. External Program Memory Read Cycle
ALE
PSEN
PORT 0
PORT 2
A8–A15
A8–A15
A0–A7
A0–A7
tAVLL
tPXIX
tLLAX
INSTR IN
tPLIV
tLHLL
tPLPH
tLLIV
tPLAZ
tLLPL
tAVIV
ALE
PSEN
PORT 0
PORT 2
Figure 2. External Data Memory Read Cycle
RD
A0–A7
FROM RI OR DPL
DATA IN
A0–A7 FROM PCL
INSTR IN
P2.0–P2.7 OR A8–A15 FROM DPH
A8–A15 FROM PCH
tWHLH
tLLDV
tLLWL
tRLRH
tLLAX
tRLAZ
tAVLL
tRHDX
tRHDZ
tAVWL
tAVDV
tRLDV



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