ADSP-21020 Datasheet, PDF (22/32 Pages) Analog Devices – 32/40-Bit IEEE Floating-Point DSP Microprocessor

ADSP-21020
IEEE 1149.1 Test Access Port
K/B/T Grade K/B/T Grade B/T Grade K Grade
Parameter
20 MHz
25 MHz 30 MHz 33.3 MHz Frequency Dependency*
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.
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REV. C