參數(shù)資料
型號(hào)： T83C5101ZZZ-3ZSIL
廠商： ATMEL CORP
元件分類： 微控制器/微處理器
英文描述： 8-BIT, MROM, 40 MHz, MICROCONTROLLER, PDIP24
封裝： DIP-24
文件頁(yè)數(shù)： 42/52頁(yè)
文件大?。?/td> 701K
代理商： T83C5101ZZZ-3ZSIL
Rev. F - 12 March, 2001
47
T87C5101
T83C5101/02
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:TXHDV = Time from clock rising edge to input data valid.
TA =0to+70
°C (commercial temperature range); V
SS =0V;VCC =5V ± 10%; -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 22. gives the maximum applicable load capacitance for Port 1, 3 and 4. Timings will be guaranteed if these
capacitances are respected. Higher capacitance values can be used, but timings will then be degraded.
Table 22. Load Capacitance versus speed range, in pF
Table 24. gives the description of each AC symbols.
Table 25. gives for each range the AC parameter.
Table 26. gives the frequency derating formula of the AC parameter. To calculate each AC symbols, take the x
value corresponding to the speed grade you need (-V or -L) and replace this value in the formula. Values of the
frequency must be limited to the corresponding speed grade:
Table 23. Max frequency for derating formula regarding the speed grade
Example:
TXHDV in X2 mode for a -V part at 20 MHz (T = 1/20
E6 = 50 ns):
T= 50ns
TXHDV=5T-x=5x50-133= 117ns
-V
-L
Port 1, 3 & 4
50
80
-V X1 mode
-V X2 mode
-L X1 mode
-L X2 mode
Freq (MHz)
40
33
40
20
T (ns)
25
30
25
50
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