Texas Instruments TMDSEMU560V2STM-U - Blackhawk XDS560v2 System Trace USB Emulator TMDSEMU560V2STM-U TMDSEMU560V2STM-U 데이터 시트
제품 코드
TMDSEMU560V2STM-U
XDS560 Emulator Cable Pod Signal Timing
3-11
Target Design Considerations for Using the XDS560 Emulation Pod
t
pdĂǒTCK_RET*TDOǓ
Ă +Ă
ƪ
t
d(TTDO)
) t
su(TDOmin)
ƫ
t
ǒTCKfactorǓ
+Ă
[15Ăns ) 2.5Ăns]
0.4
+Ă 43.75ĂnsĂ(22.9ĂMHz)
In this case, the TCK_RET-to-TDO path is the limiting factor.
Equation 3−2. Key Timing Path Case 2
Case 2: Single/multiprocessor, TMS/TDI/TCK buffered input, TDO buffered
output,
output,
TMS/TDI timed from TCK_RET high.
t
pdĂǒTCK_RET*TMSńTDIǓ
Ă +Ă t
d(TMSmax)
) t
su(TTMS)
) t
ǒbufskewǓ
+Ă [31Ăns ) 10Ăns ) 1.35Ăns]
+Ă 42.35ĂnsĂ(23.6ĂMHz)
t
pdĂǒTCK_RET*TDOǓ
Ă +Ă
ƪ
t
d(TTDO)
) t
su(TDOmin)
) t
dǒbufmaxǓ
ƫ
t
ǒTCKfactorǓ
+Ă
[15Ăns ) 2.5Ăns ) 10Ăns]
0.4
+Ă 68.75ĂnsĂ(14.5ĂMHz)
In this case, the TCK_RET-to-TDO path is the limiting factor.