TS80C51RA2-VCKB datasheet(71/74 Pages) ATMEL

71 / 74 page

Rev. C - 06 March, 2001

TS80C51RA2/RD2

TS83C51RB2/RC2/RD2

TS87C51RB2/RC2/RD2

10.5.11. External Clock Drive Characteristics (XTAL1)

10.5.12. External Clock Drive Waveforms

Figure 30. External Clock Drive Waveforms

10.5.13. AC Testing Input/Output Waveforms

Figure 31. 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”.

10.5.14. Float Waveforms

Figure 32. Float Waveforms

Table 46. AC Parameters

Symbol

Parameter

Min

Max

Units

TCLCL

Oscillator Period

TCHCX

High Time

TCLCX

Low Time

TCLCH

Rise Time

TCHCL

Fall Time

TCHCX/TCLCX

Cyclic ratio in X2 mode

VCC-0.5 V

0.45 V

0.7VCC

0.2VCC-0.1 V

TCHCL

TCLCX

TCLCL

TCLCH

TCHCX

0.45 V

VCC-0.5 V

0.2VCC+0.9

0.2VCC-0.1

INPUT/OUTPUT

VOL+0.1 V

VOH-0.1 V

FLOAT

VLOAD

VLOAD+0.1 V

VLOAD-0.1 V

TS80C51RA2-VCKB Datasheet(PDF) 71 Page - ATMEL Corporation

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