AT89C5131A-RDTUM datasheet(170/188 Pages) ATMEL

170 / 188 page

170

4337K–USB–04/08

AT89C5130A/31A-M

27.4.8

Shift Register Timing Waveform

27.4.9

External Clock Drive Characteristics (XTAL1)

Table 27-11. AC Parameters

27.4.10

External Clock Drive Waveforms

27.4.11

AC Testing Input/Output Waveforms

AC inputs during testing are driven at VCC - 0.5 for a logic “1” and 0.45V for a logic “0”. Timing

measurement are made at VIH min for a logic “1” and VIL max for a logic “0”.

27.4.12

Float Waveforms

For timing purposes as port pin is no longer floating when a 100 mV change from load voltage

occurs and begins to float when a 100 mV change from the loaded VOH/VOL level occurs. IOL/IOH

≥ ±

20 mA.

VALID

INPUT DATA

VALID

ALE

CLOCK

OUTPUT DATA

WRITE to SBUF

CLEAR RI

XLXL

QVXH

XHQX

TXHDV

XHDX

SET TI

SET RI

INSTRUCTION

VALID

Symbol

Parameter

Min

Max

Units

CLCL

Oscillator Period

CHCX

High Time

CLCX

Low Time

CLCH

Rise Time

CHCL

Fall Time

CHCX/TCLCX

Cyclic ratio in X2 mode

CC-0.5V

0.45V

0.7VCC

0.2V

CC-0.1

TCHCL

CLCX

TCLCL

TCLCH

CHCX

INPUT/OUTPUT

0.2 VCC + 0.9

0.2 V

CC - 0.1

VCC -0.5V

0.45V

FLOAT

OH - 0.1 V

OL + 0.1 V

VLOAD

VLOAD + 0.1 V

LOAD - 0.1 V

AT89C5131A-RDTUM Datasheet(PDF) 170 Page - ATMEL Corporation

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