AMD-K6 datasheet(271/346 Pages) AMD

271 / 346 page

Chapter 16

Signal Switching Characteristics

253

20695H/0—March 1998

AMD-K6® Processor Data Sheet

Preliminary Information

Table 54. TCK Waveform and TRST# Timing at 25 MHz

Symbol

Parameter Description

Preliminary Data

Figure

Comments

Min

Max

TCK Frequency

25 MHz

t103

TCK Period

40.0 ns

t104

TCK High Time

14.0 ns

t105

TCK Low Time

14.0 ns

t106

TCK Fall Time

5.0 ns

Note 1, 2

t107

TCK Rise Time

5.0 ns

Note 1, 2

t108

TRST# Pulse Width

30.0 ns

Asynchronous

Notes:

1. Rise/Fall times can be increased by 1.0 ns for each 10 MHz that TCK is run below its maximum frequency of 25 MHz.

2. Rise/Fall times are measured between 0.8 V and 2.0 V.

Table 55. Test Signal Timing at 25 MHz

Symbol

Parameter Description

Preliminary Data

Figure

Notes

Min

Max

t109

TDI Setup Time

5.0 ns

Note 2

t110

TDI Hold Time

9.0 ns

Note 2

t111

TMS Setup Time

5.0 ns

Note 2

t112

TMS Hold Time

9.0 ns

Note 2

t113

TDO Valid Delay

3.0 ns

13.0 ns

Note 1

t114

TDO Float Delay

16.0 ns

Note 1

t115

All Outputs (Non-Test) Valid Delay

3.0 ns

13.0 ns

Note 1

t116

All Outputs (Non-Test) Float Delay

16.0 ns

Note 1

t117

All Inputs (Non-Test) Setup Time

5.0 ns

Note 2

t118

All Inputs (Non-Test) Hold Time

9.0 ns

Note 2

Notes:

1. Parameter is measured from the TCK falling edge.

2. Parameter is measured from the TCK rising edge.

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