MPC8309EC datasheet(30/82 Pages) FREESCALE

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MPC8309 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 0

Freescale Semiconductor

Ethernet and MII Management

8.3.3

IEEE 1588 DC Specifications

The IEEE 1588 DC timing specifications are given in Table 27.

8.3.4

IEEE 1588 AC Specifications

The IEEE 1588 AC timing specifications are given in Table 27.

Table 26. IEEE 1588 DC Electrical Characteristics

Characteristic

Symbol

Condition

Min

Max

unit

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 = 3.2mA

—0.4

Input high voltage

VIH

—

2.0

OVDD + 0.3

Input low voltage

VIL

—

- 0.3

0.8

Input current

IIN

≤ V

IN ≤ OVDD

—± 5

μA

Table 27. IEEE 1588 AC Timing Specifications

At recommended operating conditions with OVDD of 3.3 V ± 300mV.

Parameter/Condition

Symbol

Min

Typ

Max

Unit

Notes

QE_1588_CLK clock period

tT1588CLK

2.5

—

TRX_CLK  9ns

1, 3

QE_1588_CLK duty cycle

tT1588CLKH/tT1588CLK

—

QE_1588_CLK peak-to-peak jitter

tT1588CLKINJ

——

250

—

Rise time QE_1588_CLK

(20%–80%)

tT1588CLKINR

1.0

—

2.0

—

Fall time QE_1588_CLK

(80%–20%)

tT1588CLKINF

1.0

—

2.0

—

QE_1588_CLK_OUT clock period

tT1588CLKOUT

 t

T1588CLK

——

—

QE_1588_CLK_OUT duty cycle

tT1588CLKOTH

/tT1588CLKOUT

—

QE_1588_PULSE_OUT

tT1588OV

0.5

—

3.0

—

QE_1588_TRIG_IN pulse width

tT1588TRIGH

 t

T1588CLK_MAX

——

Notes:

1.TRX_CLK is the max clock period of QUICC engine receiving clock selected by TMR_CTRL[CKSEL]. See the MPC

PowerQUICC II Pro Integrated Processor Family Reference Manual, for a description of TMR_CTRL registers.

2. It need to be at least two times of clock period of clock selected by TMR_CTRL[CKSEL]. See the MPC PowerQUICC II Pro

Integrated Processor Family Reference Manual, for a description of TMR_CTRL registers.

3. The maximum value of tT1588CLK is not only defined by the value of TRX_CLK, but also defined by the recovered clock. For

example, for 10/100 Mbps modes, the maximum value of tT1588CLK is 3600 and 280ns, respectively.

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