MPC8544VTALG datasheet(57/120 Pages) FREESCALE

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MPC8544E PowerQUICC™ III Integrated Processor Hardware Specifications, Rev. 3

Freescale Semiconductor

JTAG

12 JTAG

This section describes the AC electrical specifications for the IEEE 1149.1 (JTAG) interface of the

MPC8544E.

12.1

JTAG DC Electrical Characteristics

Table 49 provides the DC electrical characteristics for the JTAG interface.

12.2

JTAG AC Electrical Specifications

Table 50 provides the JTAG AC timing specifications as defined in Figure 34 through Figure 37.

Table 49. JTAG DC Electrical Characteristics

Parameter

Symbol

Min

Max

Unit

Notes

High-level input voltage

VIH

2OVDD + 0.3

—

Low-level input voltage

VIL

–0.3

0.8

—

Input current (OVIN = 0 V or OVIN = OVDD)IIN

—±5

μA1

High-level output voltage (OVDD = min, IOH = –2 mA)

VOH

2.4

—

Low-level output voltage (OVDD = min, IOL = 2 mA)

VOL

—0.4

—

Note:

1. Note that the symbol VIN, in this case, represents the OVIN.

Table 50. JTAG AC Timing Specifications (Independent of SYSCLK)1

At recommended operating conditions (see Table 3).

Parameter

Symbol2

Min

Max

Unit

Notes

JTAG external clock frequency of operation

fJTG

33.3

MHz

—

JTAG external clock cycle time

tJTG

—

JTAG external clock pulse width measured at 1.4 V

tJTKHKL

—

JTAG external clock rise and fall times

tJTGR & tJTGF

—

TRST assert time

tTRST

—

Input setup times:

Boundary-scan data

TMS, TDI

tJTDVKH

tJTIVKH

—

Input hold times:

Boundary-scan data

TMS, TDI

tJTDXKH

tJTIXKH

—

Valid times:

Boundary-scan data

TDO

tJTKLDV

tJTKLOV

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