PPC5553AVR112 View Datasheet(PDF) - Freescale Semiconductor
Part Name
Description
MFG CO.
'PPC5553AVR112' PDF : 60 Pages View PDF
Electrical Characteristics
3.13.3
Nexus Timing
Table 21. Nexus Debug Port Timing1
Num
Characteristic
Symbol
Min
Max
Unit
1 MCKO Cycle Time
2 MCKO Duty Cycle
3 MCKO Low to MDO Data Valid3
4 MCKO Low to MSEO Data Valid3
5 MCKO Low to EVTO Data Valid3
6 EVTI Pulse Width
7 EVTO Pulse Width
8 TCK Cycle Time
9 TCK Duty Cycle
10 TDI, TMS Data Setup Time
11 TDI, TMS Data Hold Time
12 TCK Low to TDO Data Valid
VDDE = 2.25 to 3.0 volts
tMCYC
12
8
tCYC
tMDC
40
60
%
tMDOV
–1.5
3.0
ns
tMSEOV
–1.5
3.0
ns
tEVTOV
–1.5
3.0
ns
tEVTIPW
4.0
—
tTCYC
tEVTOPW
tTCYC
1
tMCYC
44
—
tCYC
tTDC
40
60
%
tNTDIS, tNTMSS
8
—
ns
tNTDIH, tNTMSH
5
—
ns
tJOV
0
12
ns
VDDE = 3.0 to 3.6 volts
0
9
ns
13 RDY Valid to MCKO5
—
—
—
—
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 VDD = 1.35V to 1.65V, VDDE = 2.25V to 3.6V,
VDD33 and VDDSYN = 3.0V to 3.6V, TA = TL to TH, and CL = 30pF with DSC = 0b10.
2 The Nexus AUX port can only run up to 82MHz. The NPC_PCR[MCKO_DIV] must be set to divide by 2 if the system frequency
is above 82MHz
3 MDO, MSEO, and EVTO data is held valid until next MCKO low cycle.
4 The maximum frequency must be limited to approximately 16 MHz (VDDE= 2.25 to 3.0 volts) or 22 MHz (VDDE= 3.0 to 3.6
volts) to meet the timing specification for tJOV of 0.2 x tJCYC as outlined in the IEEE-ISTO 5001-2003 specification.
5 The RDY pin timing is asynchronous to MCKO. The timing is guaranteed by design to function correctly.
MCKO
MDO
MSEO
EVTO
1
2
4
3
5
Output Data Valid
Figure 9. Nexus Output Timing
MPC5553 Microcontroller Data Sheet, Rev. 0
30
Preliminary—Subject to Change Without Notice
Freescale Semiconductor
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