AT89LS53_06 datasheet(29/35 Pages) ATMEL

Nome de Peças	AT89LS53

Descrição Electrónicos	8-Bit Microcontroller with 12K Bytes Flash

PDF	35 Pages

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Fabricante Electrônico	ATMEL [ATMEL Corporation]

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29 / 35 page

0851C–MICRO–3/06

AT89LS53

Serial Port Timing: Shift Register Mode Test Conditions

The values in this table are valid for VCC = 2.7V to 6V and Load Capacitance = 80 pF.

Symbol

Parameter

12 MHz Oscillator

Variable Oscillator

Units

Min

Max

Min

Max

tXLXL

Serial Port Clock Cycle Time

1.0

12tCLCL

µs

tQVXH

Output Data Setup to Clock

Rising Edge

700

10tCLCL - 133

tXHQX

Output Data Hold After Clock

Rising Edge

2tCLCL - 117

tXHDX

Input Data Hold After Clock

Rising Edge

tXHDV

Clock Rising Edge to Input Data

Valid

700

10tCLCL - 133

Shift Register Mode Timing Waveforms

AC Testing Input/Output Waveforms (1)

Notes:

AC Inputs during testing are driven at VCC - 0.5V

for a logic 1 and 0.45V for a logic 0. Timing mea-

surements are made at VIH min. for a logic 1 and VIL

max. for a logic 0.

Float Waveforms (1)

Notes:

For timing purposes, a port pin is no longer floating

when a 100 mV change from load voltage occurs. A

port pin begins to float when a 100 mV change from

the loaded VOH/VOL level occurs.

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