MPC8248VRP datasheet(23/60 Pages) FREESCALE

23 / 60 page

MPC8272 PowerQUICC II™ Family Hardware Specifications, Rev. 1.5

Freescale Semiconductor

AC Electrical Characteristics

NOTE

The UPM machine outputs change on the internal tick determined by the

memory controller programming; the AC specifications are relative to the

internal tick. Note that SDRAM and GPCM machine outputs change on

CLKin’s rising edge.

6.3

JTAG Timings

Table 14 lists the JTAG timings.

Table 14. JTAG Timings1

Parameter

Symbol2

Min

Max

Unit

Notes

JTAG external clock frequency of operation

fJTG

033.3

MHz

JTAG external clock cycle time

tJTG

—

JTAG external clock pulse width measured at 1.4V

tJTKHKL

—

JTAG external clock rise and fall times

tJTGR and

tJTGF

TRST assert time

tTRST

—

3, 6

Input setup times

Boundary-scan data

TMS, TDI

tJTDVKH

tJTIVKH

—

4, 7

Input hold times

Boundary-scan data

TMS, TDI

tJTDXKH

tJTIXKH

—

4, 7

Output valid times

Boundary-scan data

TDO

tJTKLDV

tJTKLOV

—

5, 7

5. 7

Output hold times

Boundary-scan data

TDO

tJTKLDX

tJTKLOX

—

5, 7

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