AT80C51RA2-RLSIV datasheet(62/86 Pages) ATMEL

62 / 86 page

4188F–8051–01/08

AT/TS8xC51Rx2

Figure 11-3. ICC Test Condition, Idle Mode

Figure 11-4. ICC Test Condition, Power-Down Mode

Figure 11-5. Clock Signal Waveform for ICC Tests in Active and Idle Modes

11.5

AC Parameters

11.5.1

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 sta-

tus 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 = 0 to +70°C (commercial temperature range); VSS = 0 V; VCC = 5 V ± 10%; -M and -V ranges.

TA = -40°C to +85°C (industrial temperature range); VSS = 0 V; VCC = 5 V ± 10%; -M and -V

ranges.

RST

XTAL2

XTAL1

VSS

VCC

ICC

(NC)

VCC

All other pins are disconnected.

CLOCK

SIGNAL

Reset = Vss after a high pulse

during at least 24 clock cycles

RST

XTAL2

XTAL1

VSS

VCC

ICC

(NC)

VCC

All other pins are disconnected.

Reset = Vss after a high pulse

during at least 24 clock cycles

VCC-0.5V

0.45V

0.7VCC

0.2VCC-0.1

TCLCH

TCHCL

TCLCH = TCHCL = 5ns.

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