ADSP-21020

REV. C

–22–

IEEE 1149.1 Test Access Port

K/B/T Grade K/B/T Grade B/T Grade

K Grade

20 MHz

25 MHz

30 MHz

33.3 MHz Frequency Dependency*

Parameter

Min

Max

Min

Max

Min Max Min Max Min

Max

Unit

Timing Requirement:

TCK Period

50

40

33

30

ns

TDI, TMS Setup before TCK High

5

5

5

5

ns

6

6

6

6

ns

System Inputs Setup before TCK High 7

7

7

7

ns

System Inputs Hold after TCK High

9

9

9

9

ns

200

160

132

120

ns

Switching Characteristic:

15

15

15

15

ns

System Outputs Delay from TCK Low

26

26

26

26

ns

NOTES

System Inputs = PMD47-0, PMACK, PMTS, DMD39-0, DMACK, DMTS, CLKIN, IRQ3 0, RESET, FLAG3-0, BR.

System Outputs = PMA23-0, PMS1-0, PMRD, PMWR, PMD47-0, PMPAGE, DMA31-0, DMS1-0, DMRD, DMWR, DMD39-0, DMPAGE, FLAG3-0, BG,

TIMEXP.

See the IEEE 1149.1 Test Access Port chapter of the ADSP-21020 User’s Manual for further detail.