TS80C31X2-LIB View Datasheet(PDF) - Atmel Corporation

Part Name

Description

Manufacturer

TS80C31X2-LIB

8-bit CMOS Microcontroller ROMless

Atmel Corporation 

14.5.6 External Clock Drive Waveforms

VCC-0.5 V

0.45 V

0.7VCC

0.2VCC-0.1 V

TCHCL

TCLCX

TCHCX

TCLCH

TCLCL

14.5.7

Figure 14-10. External Clock Drive Waveforms

AC Testing Input/Output Waveforms

INPUT/OUTPUT

VCC-0.5 V

0.45 V

0.2VCC+0.9

0.2VCC-0.1

14.5.8

Figure 14-11. 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”.

Float Waveforms

FLOAT

VOH-0.1 V VLOAD

VOL+0.1 V

VLOAD+0.1 V

VLOAD-0.1 V

Figure 14-12. Float Waveforms

For timing purposes a 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

≥ ± 20mA.

14.5.9

Clock Waveforms

Valid in normal clock mode. In X2 mode XTAL2 signal must be changed to XTAL2 divided by

two.

38 AT/TS80C31X2

4428D–8051–08/05

Share Link: