PXR40 Datasheet, PDF (82/100 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Electrical characteristics
Table 32. Nexus debug port timing¹ (continued)
Spec
Characteristic
Symbol
Min
Max
Unit
10 TDI, TMS Data Setup Time
t_NTDIS, t_NTMSS
8
—
ns
11 TDI, TMS Data Hold Time
T_NTDIH, t_NTMSH
5
—
ns
12 TCK Low to TDO Data Valid
13 RDY Valid to MCKO⁶
t_NTDOV
0
10
ns
—
—
—
—
1 _{All Nexus timing relative to MCKO is measured from 50% of MCKO and 50% of the respective signal. Nexus timing specified}
at V_DD = 1.08 V to 1.32 V, V_DDE = 3.0 V to 3.6 V, V_DD33 and V_DDSYN = 3.0 V to 3.6 V, T_A = T_L to T_H, and C_L = 30 pF with
DSC = 0b10.
2 _{The Nexus AUX port runs up to 82 MHz (pending characterization). Set NPC_PCR[MKCO_DIV] to correct division depending}
on the system frequency, not to exceed maximum Nexus AUX port frequency.
3 _{See Notes on tcyc on Figure 13 and Table 25 in Section Section 5.11.1 Clocking.}
4 _{MDO, MSEO, and EVTO data is held valid until next MCKO low cycle.}
5 _{Lower frequency is required to be fully compliant to standard.}
6 _{The RDY pin timing is asynchronous to MCKO. The timing is guaranteed by design to function correctly.}
MCKO
MDO
MSEO
EVTO
EVTI
1
2
3
4
5
Output Data Valid
7
6
Figure 17. Nexus timings
PXR40 Microcontroller Data Sheet, Rev. 1
82
Freescale Semiconductor