Analog Devices ADSP-21020 - Manual (Page 22)

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:
t
TCK
TCK Period 50 40 33 30 t
CK
ns
t
STAP
TDI, TMS Setup before TCK High 5 5 5 5 ns
t
HTAP
TDI, TMS Hold after TCK High 6 6 6 6 ns
t
SSYS
System Inputs Setup before TCK High 7 7 7 7 ns
t
HSYS
System Inputs Hold after TCK High 9 9 9 9 ns
t
TRSTW
TRST Pulse Width 200 160 132 120 ns
Switching Characteristic:
t
DTDO
TDO Delay from TCK Low 15 15 15 15 ns
t
DSYS
System Outputs Delay from TCK Low 26 26 26 26 ns
NOTES
*DT = t
C
– 50 ns
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.