Electrical Specifications

32579B

9.3.17JTAG Interface

Table 9-48. JTAG Timing Parameters

Symbol

Parameter

Min

Max

Unit

Comments

 

 

 

 

 

 

 

TCK frequency

 

25

MHz

 

 

 

 

 

 

 

t1

TCK period

40

 

ns

 

 

 

 

 

 

 

t2

TCK high time

10

 

ns

 

t3

TCK low time

10

 

ns

 

t4

TCK rise time

 

4

ns

 

t5

TCK fall time

 

4

ns

 

 

 

 

 

 

 

t6

TDO valid delay

3

25

ns

 

t7

Non-test outputs valid delay

3

25

ns

50 pF load

 

 

 

 

 

 

t8

TDO float delay

 

30

ns

 

t9

Non-test outputs float delay

 

36

ns

 

t10

TDI, TMS setup time

8

 

ns

 

t11

Non-test inputs setup time

8

 

ns

 

t12

TDI, TMS hold time

7

 

ns

 

t13

Non-test inputs hold time

7

 

ns

 

t1

t2

VIH(Min)

1.5V

VIL(Max)

TCK

t4

 

 

 

t3

 

 

 

t5

 

 

 

 

 

 

 

 

 

 

 

 

 

Figure 9-58. TCK Measurement Points and Timing Diagram

AMD Geode™ SC1200/SC1201 Processor Data Book

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Image 435
AMD SC1201 Jtag Interface 48. Jtag Timing Parameters, TDI, TMS setup time, Non-test inputs setup time, TDI, TMS hold time