參數(shù)資料
型號： 935073600551
廠商： NXP SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MICROCONTROLLER, PQFP44
封裝： 10 X 10 X 1.75 MM, PLASTIC, QFP-44
文件頁數(shù)： 64/80頁
文件大?。?/td> 446K
代理商： 935073600551
1997 Dec 15
67
Philips Semiconductors
Product specication
8-bit microcontrollers
P83C524; P80C528; P83C528
25.1
Timing symbol denitions
Oscillator:
fCLK = clock frequency
tCK = clock period
Timing symbols (acronyms):
Each timing symbol has five characters. The first character
is always a 't' (= time). the remaining four characters of the
symbol (typed in subscript), depending on their relative
positions, indicate the name of a signal or the logical status
of that signal. the designations are as follows:
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
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