mpc8560vt667jb Freescale Semiconductor, Inc, mpc8560vt667jb Datasheet - Page 16

• Manufacturer Part Number: mpc8560vt667jb
• Description: Mpc8560 Powerquicc Iii Integrated Communications Processor
• Manufacturer: Freescale Semiconductor, Inc

Clock Timing
4.2 TSEC Gigabit Reference Clock Timing
Table 7
MPC8560.
4.3 RapidIO Transmit Clock Input Timing
Table 9
MPC8560.
16
EC_GTX_CLK125 frequency
EC_GTX_CLK125 cycle time
EC_GTX_CLK125 rise and fall time
EC_GTX_CLK125 duty cycle
Notes:
1. Timing is guaranteed by design and characterization.
2. Rise and fall times for EC_GTX_CLK125 are measured from 0.5V and 2.0V for LV
3. EC_GTX_CLK125 is used to generate GTX clock for TSEC transmitter with 2% degradation EC_GTX_CLK125 duty cycle
RIO_TX_CLK_IN frequency
RIO_TX_CLK_IN cycle time
RIO_TX_CLK_IN duty cycle
Notes:
1. Requires
LV
can be loosened from 47/53% as long as PHY device can tolerate the duty cycle generated by GTX_CLK of TSEC.
DD
provides the TSEC gigabit reference clock (EC_GTX_CLK125) AC timing specifications for the
provides the RapidIO transmit clock input (RIO_TX_CLK_IN) AC timing specifications for the
=3.3V.
Parameter/Condition
Parameter/Condition
±
100 ppm long term frequency stability. Timing is guaranteed by design and characterization.
MPC8560 Integrated Processor Hardware Specifications, Rev. 4.2
Table 8. EC_GTX_CLK125 AC Timing Specifications
Table 9. RIO_TX_CLK_IN AC Timing Specifications
RGMII, RTBI
GMII, TBI
LV
LV
DD
DD
=2.5
=3.3
t
G125R
t
t
RCLKH
G125H
Symbol
Symbol
f
t
f
t
G125
G125
RCLK
RCLK
, t
/t
/t
G125F
G125
RCLK
Min
125
Min
—
48
45
47
—
—
—
Typical
Typical
—
—
—
125
—
—
8
DD
=2.5V, and from 0.6 and 2.7V for
Max
52
—
8
Max
0.75
55
53
—
—
1
Freescale Semiconductor
MHz
Unit
ns
%
MHz
Unit
ns
ns
%
Notes
—
—
1
Notes
1, 3
—
—
2