mpc8379e Freescale Semiconductor, Inc, mpc8379e Datasheet - Page 61

• Manufacturer Part Number: mpc8379e
• Description: Powerquicc Ii Pro Processor Hardware Specifications
• Manufacturer: Freescale Semiconductor, Inc

15.1
The reference clock is a single ended input clock required for the SATA interface operation. The AC
requirements for the SATA reference clock are listed in the
Figure 42
15.2
This section discusses the Gen1i/1.5G and Gen2i/3G transmitter output characteristics for the SATA
interface.
Freescale Semiconductor
SD_REF_CLK/ SD_REF_CLK
frequency range
SD_REF_CLK/ SD_REF_CLK
clock frequency tolerance
SD_REF_CLK/ SD_REF_CLK
reference clock duty cycle
SD_REF_CLK/ SD_REF_CLK
cycle to cycle Clock jitter (period
jitter)
SD_REF_CLK/ SD_REF_CLK total
reference clock jitter, phase jitter
(peak-peak)
Note:
1
2
3
Only 100/125/150 MHz have been tested, othe in between values will not work correctly with the rest of the system.
In a frequency band from 150 kHz to 15 MHz at BER of 10
Total peak to peak Deterministic Jitter "D
Requirements for SATA REF_CLK
Transmitter (Tx) Output Characteristics
shows the SATA reference clock timing waveform.
Parameter
MPC8379E PowerQUICC II Pro Processor Hardware Specifications, Rev. 3
Ref_CLK
Table 51. SATA Reference Clock Input Requirements
Figure 42. SATA Reference Clock Timing Waveform
Peak-to-peak jitter
Measured at 1.6V
Cycle-to-cycle at
at ref clock input
ref clock input
Condition
J
" should be less than or equal to 50 ps.
—
—
t
t
CLK_DUTY
t
Symbol
CLK_REF
CLK_TOL
t
t
CLK_CJ
CLK_PJ
-12
.
T
L
Table
–350
Min
–50
40
—
—
51.
T
H
100/125/150
Typical
—
—
50
0
+350
Max
100
+50
—
60
Serial ATA (SATA)
MHz
Unit
ppm
ps
ps
%
Notes
2, 3
—
—
—
1
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