AM486DX2 datasheet(60/67 Pages) AMD

60 / 67 page

Am5X86 Microprocessor

AMD

PRELIMINARY

Am5X86 Microprocessor AC Characteristics for

Boundary Scan Test Signals at 25 MHz

CC = 3.3 V ±0.3 V; TCASE = 0°C to +85°C; CL = 50 pF unless otherwise specified

Preliminary Info

Symbol

Parameter

Min

Max

Unit

Figure

Notes

t24

TCK Frequency

MHz

1x Clock

t25

TCK Period

45, 46

Note 1

t26

TCK High Time at 2 V

t27

TCK Low Time at 0.8 V

t28

TCK Rise Time (0.8 V–2 V)

Note 2

t29

TCK Fall Time (2 V–0.8 V)

Note 2

t30

TDI, TMS Setup Time

Note 3

t31

TDI, TMS Hold Time

Note 3

t32

TDO Valid Delay

Note 3

t33

TDO Float Delay

Note 3

t34

All Outputs (Non-Test) Valid Delay

Note 3

t35

All Outputs (Non-Test) Float Delay

Note 3

t36

All Inputs (Non-Test) Setup Delay

Note 3

t37

All Inputs (Non-Test) Hold Time

Note 3

Notes:

1. TCK period

≥ CLK period.

2. Rise/Fall times can be relaxed by 1 ns per 10-ns increase in TCK period.

3. Parameter measured from TCK.

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