Datasheet
MPC8306 PowerQUICC II Pro Integrated Communications Processor Family Hardware Specifications, Rev. 2
28 Freescale Semiconductor
Ethernet and MII Management
8.4 IEEE 1588
8.4.1 DC Specifications
The IEEE 1588 DC timing specifications are given in the following table.
8.4.2 IEEE 1588 AC Specifications
The IEEE 1588 AC timing specifications are given in the following table.
Table 26. IEEE 1588 DC Electrical Characteristics
Characteristic Symbol Condition Min Max unit
Output high voltage V
OH
I
OH
= -8.0 mA 2.4 — V
Output low voltage V
OL
I
OL
= 8.0 mA — 0.5 V
Output low voltage
V
OL
I
OL
= 3.2mA
—0.4V
Input high voltage V
IH
— 2.0 OV
DD
+ 0.3 V
Input low voltage V
IL
— - 0.3 0.8 V
Input current I
IN
0V ≤ V
IN
≤ OV
DD
—± 5μA
Table 27. IEEE 1588 AC Timing Specifications
At recommended operating conditions with OV
DD
of 3.3 V ± 300mV.
Parameter/Condition Symbol Min Typ Max Unit Note
QE_1588_CLK clock period t
T1588CLK
2.5 — T
RX_CLK
9ns 1, 3
QE_1588_CLK duty cycle t
T1588CLKH
/t
T1588CLK
40 50 60 % —
QE_1588_CLK peak-to-peak jitter t
T1588CLKINJ
——250ps—
Rise time QE_1588_CLK
(20%–80%)
t
T1588CLKINR
1.0 — 2.0 ns —
Fall time QE_1588_CLK
(80%–20%)
t
T1588CLKINF
1.0 — 2.0 ns —
QE_1588_CLK_OUT clock period t
T1588CLKOUT
2 t
T1588CLK
——ns—
QE_1588_CLK_OUT duty cycle t
T1588CLKOTH
/t
T1588CLKOUT
30 50 70 % —
QE_1588_PULSE_OUT t
T1588OV
0.5 — 3.0 ns —
QE_1588_TRIG_IN pulse width t
T1588TRIGH
2 t
T1588CLK_MAX
——ns2
Notes:
1.T
RX_CLK
is the max clock period of QUICC engine receiving clock selected by TMR_CTRL[CKSEL]. See the MPC8306
PowerQUICC II Pro Integrated Communications Processor Family Reference Manual, for a description of TMR_CTRL
registers.
2. It needs to be at least two times of clock period of clock selected by TMR_CTRL[CKSEL]. See the MPC8306 PowerQUICC
II Pro Integrated Communications Processor Family Reference Manual, for a description of TMR_CTRL registers.
3. The maximum value of t
T1588CLK
is not only defined by the value of T
RX_CLK
, but also defined by the recovered clock. For
example, for 10/100 Mbps modes, the maximum value of t
T1588CLK
is 3600 and 280ns, respectively.