參數(shù)資料
型號(hào)： TS80C52X2-ECED
廠商： TEMIC SEMICONDUCTORS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, MICROCONTROLLER, PQFP44
封裝： VQFP-44
文件頁(yè)數(shù)： 39/56頁(yè)
文件大小： 689K
代理商： TS80C52X2-ECED
44
Rev. C - Aug. 31, 1999
TS80C52X2
10.5 AC Parameters
10.5.1 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:TAVLL = Time for Address Valid to ALE Low.
TLLPL = Time for ALE Low to PSEN Low.
TA =0to+70
°C (commercial temperature range); V
SS =0V;VCC =5V ± 10%; -M and -V ranges.
TA = -40
°Cto+85°C (industrial temperature range); V
SS =0V;
VCC =5V ± 10%; -M and -V ranges.
TA =0to+70
°C (commercial temperature range); V
SS =0V;2.7V<VCC < 5.5 V; -L range.
TA = -40
°Cto+85°C (industrial temperature range); V
SS =0V;2.7V<VCC < 5.5 V; -L range.
Table 24. gives the maximum applicable load capacitance for Port 0, Port 1, 2 and 3, and ALE and PSEN signals.
Timings will be guaranteed if these capacitances are respected. Higher capacitance values can be used, but timings
will then be degraded.
Table 24. Load Capacitance versus speed range, in pF
Table 26., Table 29. and Table 32. give the description of each AC symbols.
Table 27., Table 30. and Table 33. give for each range the AC parameter.
Table 28., Table 31. and Table 34. 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. Values of the frequency must be limited to the corresponding speed grade:
Table 25. Max frequency for derating formula regarding the speed grade
Example:
TLLIV in X2 mode for a -V part at 20 MHz (T = 1/20
E6 = 50 ns):
T= 50ns
TLLIV=2T-x=2x50-25= 75ns
-M
-V
-L
Port 0
100
50
100
Port 1, 2, 3
80
50
80
ALE / PSEN
100
30
100
-M X1 mode
-M X2 mode
-V X1 mode
-V X2 mode
-L X1 mode
-L X2 mode
Freq (MHz)
40
20
40
30
20
T (ns)
25
50
25
33.3
50
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