MV78100 Datasheet, PDF (104/124 Pages) –

MV78100
Hardware Specifications
9.7
9.7.1
9.7.1.1
Differential Interface Electrical Characteristics
This section provides the reference clock, AC, and DC characteristics for the following differential
interfaces:
„ PCI Express (PCIe) Interface Electrical Characteristics
„ SATA Interface Electrical Characteristics
„ USB Interface Electrical Characteristics
Differential Interface Reference Clock Characteristics
PCI Express Interface Differential Reference Clock Characteristics
Table 52
Note
The reference clock characteristics in Table 52 is relevant for the PEX0_CLK_P,
PEX0_CLK_N, PEX1_CLK_P, PEX1_CLK_N pins.
Table 51: PCI Express Interface Differential Reference Clock Characteristics
De s cr iption
Sym bol
M in
M ax
Clock frequency
f CK
100.0
Clock duty cycle
DCref c lk
0.4
0.6
Differential rising/falling slew rate
SRref c lk
0.6
4.0
Differential high voltage
VIHrefclk 150.0
-
Differential low voltage
V ILref c lk
-
-150.0
Absolute crossing point voltage
Vcross
250.0
550.0
Variation of Vcross over all rising clock edges
Vcrs_dlta
-
140.0
Average differential clock period accuracy
Tperavg -300.0
2800.0
Absolute differential clock period
Tperabs
9.8
10.2
Differential clock cycle-to-cycle jitter
Tccjit
-
150.0
Note s :
General Comment: The ref erence clock timings are based on 100 ohm test circuit.
General Comment: Refer to the PCI Express Card Electromechanical Specification, Revision 1.1,
March 2005, section 2.1.3 for more information.
1. Defined on a single-ended signal.
2. Including jitter and spread spectrum.
3. Defined from -150 mV to +150 mV on the differential w aveform.
Units
MHz
tCK
V/nS
mV
mV
mV
mV
ppm
nS
pS
Note s
-
-
3
-
-
1
1
-
2
-
MV-S104552-U0 Rev. D
Page 104
Document Classification: Proprietary Information
Copyright © 2008 Marvell
December 6, 2008, Preliminary