Datasheet

1
1
2
3
5
TMS
TDI
TDO
RTCK
TCK
4
TMS570LS20216, TMS570LS20206, TMS570LS10216
TMS570LS10206, TMS570LS10116, TMS570LS10106
SPNS141FAUGUST 2010 REVISED JULY 2011
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7.5 DAP - JTAG Scan Interface Timing
7.5.1 JTAG clock specification 12-MHz and 50-pF load on TDO output
Table 7-9. JTAG Scan Interface Timing
NO. MIN MAX Unit
f
(TCK)
TCK frequency (at HCLKmax) 12 MHz
f
(RTCK)
RTCK frequency (at TCKmax and HCLKmax) 10 MHz
1 t
d(TCK -RTCK)
Delay time, TCK to RTCK 20 ns
2 t
su(TDI/TMS - RTCKr)
Setup time, TDI, TMS before RTCK rise (RTCKr) 15 ns
3 t
h(RTCKr -TDI/TMS)
Hold time, TDI, TMS after RTCKr 0 ns
4 t
h(RTCKf -TDO)
Hold time, TDO after RTCKf 0 ns
5 t
d(RTCKf -TDO)
Delay time, TDO valid after RTCK fall (RTCKf) 10 ns
Note: The timings in this table are measured with a 50pF and 50µA load. And they are measured at the 50% point, not 20% or 80% point.
Figure 7-6. JTAG timing
74 Peripheral and Electrical Specifications Copyright © 20102011, Texas Instruments Incorporated
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