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參數(shù)資料
| 型號： | P83C453EFAA |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | CMOS single-chip 8-bit microcontrollers |
| 中文描述： | OTPROM, 8 MHz, MICROCONTROLLER, PQCC68 |
| 封裝： | PLASTIC, SOT-168-3, MO-047AE, LCC-68 |
| 文件頁數(shù)： | 16/23頁 |
| 文件大?。?/td> | 163K |
| 代理商： | P83C453EFAA |
Philips Semiconductors
Preliminary specification
80C453/83C453/87C453
CMOS single-chip 8-bit microcontrollers
1996 Aug 15
3-326
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:
t
AVLL
= Time for address valid to ALE low.
t
LLPL
= Time for ALE low to PSEN low.
t
PXIZ
ALE
PSEN
PORT 0
PORT 2
A0–A15
A8–A15
A0–A7
A0–A7
t
AVLL
t
PXIX
t
LLAX
INSTR IN
t
PLIV
t
LHLL
t
PLPH
t
LLIV
t
PLAZ
t
LLPL
t
AVIV
SU00056
Figure 9. External Program Memory Read Cycle
t
LLAX
ALE
PSEN
PORT 0
PORT 2
RD
A0–A7
FROM RI OR DPL
DATA IN
A0–A7 FROM PCL
INSTR IN
P2.0–P2.7 OR A8–A15 FROM DPH
A0–A15 FROM PCH
t
WHLH
t
LLDV
t
LLWL
t
RLRH
t
RLAZ
t
AVLL
t
RHDX
t
RHDZ
t
AVWL
t
AVDV
t
RLDV
SU00007
Figure 10. External Data Memory Read Cycle
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