88F6180_1 Datasheet, PDF (69/112 Pages) –

Electrical Specifications
AC Electrical Specifications
8.6
8.6.1
AC Electrical Specifications
See Section 8.7, Differential Interface Electrical Characteristics, on page 92 for differential interface
specifications.
Reference Clock AC Timing Specifications
Table 40: Reference Clock AC Timing Specifications
Description
CPU and Core Reference Clock
Frequency
Symbol
F_{REF_CLK_XIN}
Clock duty cycle
Slew rate
Pk-Pk jitter
Ethernet Reference Clock
Frequency in MII/MMII-MAC mode
MII/MMII-MAC mode clock duty cycle
Slew rate
Audio External Reference Clock
Audio external reference clock
S/PDIF Recovered Master Clock
S/PDIF recovered master clock
I²S R e f e r e n c e C lo c k
I²S clock
SPI Output Clock
SPI output clock
RTC Reference Clock
RTC_XIN crystal frequency
SMI Master Mode Reference Clock
SMI output MDC clock
TWSI Master Mode Reference Clock
SCK output clock
DC_{REF_CLK_XIN}
SR_{REF_CLK_XIN}
JR_{REF_CLK_XIN}
F_{GE_TXCLK_OUT}
F_{GE_RXCLK}
DC_{GE_TXCLK_OUT}
DC_{GE_RXCLK}
SR_{GE_TXCLK_OUT}
SR_{GE_RXCLK}
F_{AU_EXTCLK}
F_{AU_SPDFRMCLK}
F_{I2S_BCLK}
F_{SPI_SCK}
F_{RTC_XIN}
F_{GE_MDC}
F_{TW_SCK}
PTP Reference Clock
Frequency
F_{PTP_CLK}
Clock duty cycle
DC_{PTP_CLK}
Min
Max
Units Notes
25 -
50 ppm
25 +
50 ppm
MHz
40
60
%
0.7
V/ns 1
200
ps
2.5 -
100 ppm
50 +
100 ppm
MHz
35
65
%
0.7
V/ns 1
256 X F_s
kHz
3
256 X F_s
kHz
3
64 X F_s
kHz
3
TCLK/30 TCLK/4 MHz 2
32.768
kHz
4
TCLK/128
MHz
TCLK/
kHz
6
1600
125 -
100 ppm
40
125 +
100 ppm
60
MHz
%
Copyright © 2008 Marvell
December 2, 2008, Preliminary
Document Classification: Proprietary Information
Doc. No. MV-S104988-U0 Rev. E
Page 69