参数资料
型号: MPC8560PXAQLC
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 32-BIT, 1000 MHz, RISC PROCESSOR, PBGA783
封装: 29 X 29 MM, 3.75 MM HEIGHT, 1 MM PITCH, FLIP CHIP, PLASTIC, BGA-783
文件页数: 16/108页
文件大小: 1379K
代理商: MPC8560PXAQLC
MPC8560 Integrated Processor Hardware Specifications, Rev. 4
Freescale Semiconductor
15
Clock Timing
4 Clock Timing
4.1 System Clock Timing
Table 7 provides the system clock (SYSCLK) AC timing specifications for the MPC8560.
4.2 TSEC Gigabit Reference Clock Timing
Table 7 provides the TSEC gigabit reference clock (EC_GTX_CLK125) AC timing specifications for the
MPC8560.
Table 7. SYSCLK AC Timing Specifications
Parameter/Condition
Symbol
Min
Typical
Max
Unit
Notes
SYSCLK frequency
fSYSCLK
——
166
MHz
1
SYSCLK cycle time
tSYSCLK
6.0
ns
SYSCLK rise and fall time
tKH, tKL
0.6
1.0
1.2
ns
2
SYSCLK duty cycle
tKHKL/tSYSCLK
40
60
%
3
SYSCLK jitter
+/- 150
ps
4, 5
Notes:
1.Caution: The CCB to SYSCLK ratio and e500 core to CCB ratio settings must be chosen such that the resulting SYSCLK
frequency, e500 (core) frequency, and CCB frequency do not exceed their respective maximum or minimum operating
settings.
2. Rise and fall times for SYSCLK are measured at 0.6 V and 2.7 V.
3. Timing is guaranteed by design and characterization.
4. This represents the total input jitter—short term and long term—and is guaranteed by design.
5. For spread spectrum clocking, guidelines are +/-1% of the input frequency with a maximum of 60 kHz of modulation
regardless of the input frequency.
Table 8. EC_GTX_CLK125 AC Timing Specifications
Parameter/Condition
Symbol
Min
Typical
Max
Unit
Notes
EC_GTX_CLK125 frequency
fG125
—125
MHz
EC_GTX_CLK125 cycle time
tG125
—8—
ns
EC_GTX_CLK125 rise and fall time
LVDD=2.5
LVDD=3.3
tG125R, tG125F
——
0.75
1
ns
2
EC_GTX_CLK125 duty cycle
GMII, TBI
RGMII, RTBI
tG125H/tG125
45
47
55
53
%1,3
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 LVDD=2.5V, and from 0.6 and 2.7V for
LVDD=3.3V.
3. EC_GTX_CLK125 is used to generate GTX clock for TSEC transmitter with 2% degradation EC_GTX_CLK125 duty cycle
can be loosened from 47/53% as long as PHY device can tolerate the duty cycle generated by GTX_CLK of TSEC.
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