PXD10 Datasheet, PDF (107/130 Pages) Lumins Inc. – 4” Dia.X 6” extruded aluminum step poles

Electrical characteristics
Table 54. Nexus debug port timing¹ (continued)
No.
Symbol
C
Parameter
Value
Unit
Min
Max
7
t_EVTOPW
CC D EVTO Pulse Width
8
t_TCYC
CC D TCK Cycle Time³
1
—
t_MCYC
100
—
ns
9
_TDC
CC D TCK Duty Cycle
40
60
%
10 t_NTDIS, t_NTMSS CC D TDI, TMS Data Setup Time
10
—
ns
11 t_NTDIH, t_NTMSH CC D TDI, TMS Data Hold Time
5
—
ns
12
t_JOV
CC D TCK Low to TDO Data Valid
0
40
ns
NOTES:
1 _{JTAG specifications in this table apply when used for debug functionality. All Nexus timing relative to MCKO is}
measured from 50% of MCKO and 50% of the respective signal. Nexus timing specified at V_DD = 3.0 V to 5.5V,
T_A = 40 to 105 °C, and C_L = 50 pF (C_L = 30 pF on MCKO), with SRC = 0b11.
2 _{MDO, MSEO, and EVTO data is held valid until next MCKO low cycle.}
3 _{The system clock frequency needs to be three times faster than the TCK frequency.}
MCKO
MDO
MSEO
EVTO
1
2
3
4
5
Output Data Valid
Figure 26. Nexus output timing
TCK
8
9
9
Figure 27. Nexus TCK timing
PXD10 Microcontroller Data Sheet, Rev. 1
Freescale Semiconductor
107