MPC8308VMAFDA datasheet(53/88 Pages) FREESCALE

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MPC8308 PowerQUICC II Pro Processor Hardware Specification, Rev. 0

Freescale Semiconductor

JTAG

14 JTAG

This section describes the DC and AC electrical specifications for the IEEE Std 1149.1™ (JTAG)

interface.

14.1

JTAG DC Electrical Characteristics

Table 41 provides the DC electrical characteristics for the IEEE 1149.1 (JTAG) interface.

14.2

JTAG AC Timing Specifications

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

Table 42 provides the JTAG AC timing specifications as defined in Figure 41 through Figure 44.

Table 41. JTAG Interface DC Electrical Characteristics

Characteristic

Symbol

Condition

Min

Max

Unit

Input high voltage

VIH

—2.1

NVDD +0.3

Input low voltage

VIL

—–0.3

0.8

Input current

IIN

—±5

μA

Output high voltage

VOH

IOH = –8.0 mA

2.4

—

Output low voltage

VOL

IOL = 8.0 mA

—

0.5

Output low voltage

VOL

IOL = 3.2 mA

—

0.4

Table 42. JTAG AC Timing Specifications (Independent of SYS_CLK_IN) 1

At recommended operating conditions (see Table 2).

Parameter

Symbol2

Min

Max

Unit

Notes

JTAG external clock frequency of operation

fJTG

033.3

MHz

—

JTAG external clock cycle time

t JTG

—

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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