MSC8156E_11 Datasheet, PDF (43/68 Pages) Freescale Semiconductor, Inc – Six-Core Digital Signal Processor with Security

Electrical Characteristics
2.6.2.3 Serial RapidIO AC Timing Specifications
Note: Specifications are valid at the recommended operating conditions listed in Table 3.
Table 27 defines the transmitter AC specifications for the Serial RapidIO interface. The AC timing specifications do not include
REF_CLK jitter.
Table 27. Serial RapidIO Transmitter AC Timing Specifications
Characteristic
Deterministic Jitter
Total Jitter
Unit Interval: 1.25 GBaud
Unit Interval: 2.5 GBaud
Unit Interval: 3.125 GBaud
Symbol
J_D
J_T
UI
UI
UI
Min
—
—
800 – 100ppm
400 – 100ppm
320 – 100ppm
Typical
—
—
800
400
320
Max
0.17
0.35
800 + 100ppm
400 + 100ppm
320 + 100ppm
Unit
UI p-p
UI p-p
ps
ps
ps
Table 28 defines the Receiver AC specifications for the Serial RapidIO interface. The AC timing specifications do not include
REF_CLK jitter.
Table 28. Serial RapidIO Receiver AC Timing Specifications
Characteristic
Symbol
Min
Typical
Max
Unit
Notes
Deterministic Jitter Tolerance
J_D
0.37
—
Combined Deterministic and Random Jitter
J_DR
0.55
—
Tolerance
—
UI p-p
1
—
UI p-p
1
Total Jitter Tolerance
Bit Error Rate
J_T
BER
0.65
—
—
—
UI p-p
1, 2
—
10^–12
—
—
Unit Interval: 1.25 GBaud
UI
800 – 100ppm
800
800 + 100ppm
ps
—
Unit Interval: 2.5 GBaud
UI
400 – 100ppm
400
400 + 100ppm
ps
—
Unit Interval: 3.125 GBaud
UI
320 – 100ppm
320
320 + 100ppm
ps
—
Notes: 1. Measured at receiver.
2. Total jitter is composed of three components, deterministic jitter, random jitter, and single frequency sinusoidal jitter. The
sinusoidal jitter may have any amplitude and frequency in the unshaded region of Figure 18. The sinusoidal jitter component
is included to ensure margin for low frequency jitter, wander, noise, crosstalk, and other variable system effects.
8.5 UI p-p
Sinusoidal
Jitter
Amplitude
0.10 UI p-p
22.1 kHz
Frequency
1.875 MHz 20 MHz
Figure 18. Single Frequency Sinusoidal Jitter Limits
MSC8156E Six-Core Digital Signal Processor with Security Data Sheet, Rev. 4
Freescale Semiconductor
43