參數(shù)資料
型號(hào)： TS87C52X2-VCER
英文描述： 8-bit CMOS Microcontroller 0-60 MHz
中文描述： 8位CMOS微控制器0-60兆赫
文件頁(yè)數(shù)： 43/54頁(yè)
文件大?。?/td> 626K
代理商： TS87C52X2-VCER
Rev. B - Jan. 25, 1999
43
Preliminary
TS80C52X2
Figure 16. Clock Signal Waveform for I
CC
Tests in Active and Idle Modes
10.4 AC Parameters
10.4.1 Explanation of the AC Symbols
Each timing symbol has 5 characters. The first character is always a “T” (stands for time). The other characters,
depending on their positions, stand for the name of a signal or the logical status of that signal. The following is
a list of all the characters and what they stand for.
Example:T
AVLL
= Time for Address Valid to ALE Low.
T
LLPL
= Time for ALE Low to PSEN Low.
T
A
= 0 to +70
°
C; V
SS
= 0 V; V
CC
= 5 V
±
10%; -M and -V ranges.
T
A
= -40
°
C to +85
°
C; V
SS
= 0 V; V
CC
= 5 V
±
10%; -M and -V ranges.
T
A
= 0 to +70
°
C; V
SS
= 0 V; 2.7 V < V
CC <
5.5 V; -L range.
T
A
= -40
°
C to +85
°
C; V
SS
= 0 V; 2.7 V < V
CC <
5.5 V; -L range.
(Load Capacitance for port 0, ALE and PSEN = 100 pF; Load Capacitance for all other outputs = 80 pF.)
Table 24., Table 27. and Table 30. give the description of each AC symbols.
Table 25., Table 28. and Table 31. give for each range the AC parameter.
Table 26., Table 29. and Table 32. give the frequency derating formula of the AC parameter. To calculate each
AC symbols, take the x value corresponding to the speed grade you need (-M, -V or -L) and replace this value
in the formula.
Example:
T
LLIV
in X2 mode for a -V part at 25 MHz:
x= 22
T= 40ns
T
LLIV
= 2T - x = 2 x 40 - 22 = 58ns
V
CC
-0.5V
0.45V
T
CHCL
0.7V
CC
0.2V
CC
-0.1
T
CLCH
T
CLCH
= T
CHCL
= 5ns.
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