S83C562-2A68 View Datasheet(PDF) - Philips Electronics
Part Name
Description
Manufacturer
S83C562-2A68 Datasheet PDF : 20 Pages
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Philips Semiconductors
Single-chip 8-bit microcontroller
Product specification
80C562/83C562
EXPLANATION OF THE AC SYMBOLS
Each timing symbol has five characters. The Q – Output data
first character is always ‘t’ (= time). The other R – RD signal
characters, depending on their positions,
t – Time
indicate the name of a signal or the logical
V – Valid
status of that signal. The designations are:
W – WR signal
A – Address
X – No longer a valid logic level
C – Clock
Z – Float
D – Input data
H – Logic level high
Examples: tAVLL = Time for address valid
to ALE low.
I – Instruction (program memory contents)
L – Logic level low, or ALE
tLLPL = Time for ALE low to
PSEN low.
P – PSEN
ALE
PSEN
PORT 0
PORT 2
tLHLL
tAVLL
tLLPL
tPLPH
tLLIV
tPLIV
tLLAX
tPLAZ
tPXIX
A0–A7
INSTR IN
tPXIZ
tAVIV
A0–A15
A0–A7
A8–A15
Figure 2. External Program Memory Read Cycle
ALE
PSEN
RD
PORT 0
PORT 2
1992 Jan 08
tWHLH
tLLDV
tLLWL
tRLRH
tAVLL
tLLAX
A0–A7
FROM RI OR DPL
tRLAZ
tRLDV
tRHDX
DATA IN
tAVWL
tAVDV
P2.0–P2.7 OR A8–A15 FROM DPH
tRHDZ
A0–A7 FROM PCL
A0–A15 FROM PCH
Figure 3. External Data Memory Read Cycle
11
SU00006
INSTR IN
SU00007
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