AT89C51ID2-RDTIM datasheet(142/159 Pages) ATMEL

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142

AT89C51ID2

4289A–8051–09/03

Figure 58. I

CC Test Condition, Idle Mode

Figure 59. I

CC Test Condition, Power-down Mode

Figure 60. Clock Signal Waveform for I

CC Tests in Active and Idle Modes

AC Parameters

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.

LLPL = Time for ALE Low to PSEN Low.

(Load Capacitance for port 0, ALE and PSEN = 100 pF; Load Capacitance for all other

outputs = 80 pF.)

Table 97 Table 100, and Table 103 give the description of each AC symbols.

Table 98, Table 99, Table 101 and Table 104 gives the range for each AC parameter.

RST

XTAL2

XTAL1

(NC)

All other pins are disconnected.

CLOCK

SIGNAL

RST

XTAL2

XTAL1

VSS

VCC

(NC)

All other pins are disconnected.

CC-0.5V

0.45V

0.7V

0.2VCC-0.1

TCLCH

TCHCL

CLCH = TCHCL = 5ns.

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