P5021 datasheet(85/155 Pages) NXP

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Electrical characteristics

P5021 QorIQ Integrated Processor Data Sheet, Rev. 1

Freescale Semiconductor

2.12.4.2

eTSEC IEEE Std 1588 AC specifications

This table provides the IEEE 1588 AC timing specifications.

Input low current (LVDD = Max, VIN = 0.5 V)

IIL

–600

—

μA1

Output high voltage (LVDD = Min, IOH = –1.0 mA)

VOH

2.4

—

Output low voltage (LVDD = Min, IOL = 1.0 mA)

VOL

—0.4

—

Note:

1. Note that the symbol VIN, in this case, represents the LVIN symbol referenced in Table 2 and Table 3.

2. The min VIL and max VIH values are based on the respective LVIN values found in Table 3.

Table 43. eTSEC IEEE 1588 AC timing specifications

For recommended operating conditions, see Table 3.

Parameter

Symbol

Min

Typ

Max

Unit

Notes

TSEC_1588_CLK clock period

tT1588CLK

3.3

—

TRX_CLK × 7ns

1, 2

TSEC_1588_CLK duty cycle

tT1588CLKH/

tT1588CLK

TSEC_1588_CLK peak-to-peak jitter

tT1588CLKINJ

—

250

—

Rise time eTSEC_1588_CLK (20%–80%)

tT1588CLKINR

1.0

—

2.0

—

Fall time eTSEC_1588_CLK (80%–20%)

tT1588CLKINF

1.0

—

2.0

—

TSEC_1588_CLK_OUT clock period

tT1588CLKOUT

× t

T1588CLK

——

—

TSEC_1588_CLK_OUT duty cycle

tT1588CLKOTH/

tT1588CLKOUT

—

TSEC_1588_PULSE_OUT

tT1588OV

0.5

—

3.0

—

TSEC_1588_TRIG_IN pulse width

tT1588TRIGH

× t

T1588CLK_MAX

——

Notes:

1.TRX_CLK is the maximum clock period of eTSEC receiving clock selected by TMR_CTRL[CKSEL]. See the QorIQ Integrated

Processor Reference Manual for a description of TMR_CTRL registers.

2. 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 10/100/1000 Mbps modes, the maximum value of tT1588CLK be 2800, 280, and 56 ns, respectively.

3. It needs to be at least two times the clock period of the clock selected by TMR_CTRL[CKSEL]. See the QorIQ Integrated

Processor Reference Manual for a description of TMR_CTRL registers.

Table 42. eTSEC IEEE 1588 DC electrical characteristics (LVDD = 3.3 V) (continued)

For recommended operating conditions, see Table 3.

Parameter

Symbol

Min

Max

Unit

Notes

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