88F6281
Hardware Specifications
8.6
AC Electrical Specifications
See Section 8.7, Differential Interface Electrical Characteristics, on page 118 for differential interface
specifications.
8.6.1
Reference Clock AC Timing Specifications
Table 45: Reference Clock AC Timing Specifications
Description
Symbol
Min
Max
Units
Notes
CPU and Core Reference Clock
Frequency
F
25 -
25 +
MHz
REF_CLK_XIN
50 ppm
50 ppm
Clock duty cycle
DC
SR
40
60
%
REF_CLK_XIN
REF_CLK_XIN
REF_CLK_XIN
Slew rate
0.7
V/ns
ps
1
Pk-Pk jitter
JR
200
Ethernet Reference Clock
Frequency in MII/MMII-MAC mode
F
F
GE_TXCLK_OUT
2.5 -
100 ppm
50 +
100 ppm
MHz
%
7
GE_RXCLK
MII/MMII-MAC mode clock duty cycle
Slew rate
DC
DC
SR
SR
GE_TXCLK_OUT
35
65
7
GE_RXCLK
GE_TXCLK_OUT
GE_RXCLK
0.7
V/ns
1, 7
Audio External Reference Clock
Audio external reference clock
F
256 X F
kHz
kHz
kHz
MHz
kHz
3
3
3
2
4
AU_EXTCLK
s
s
S/PDIF Recovered Master Clock
S/PDIF recovered master clock
F
256 X F
AU_SPDFRMCLK
2
I S Reference Clock
2
I S clock
F
64 X F
s
I2S_BCLK
SPI_SCK
RTC_XIN
SPI Output Clock
SPI output clock
F
F
TCLK/30
TCLK/4
RTC Reference Clock
RTC_XIN crystal frequency
32.768
Transport Stream (TS) Output Mode Reference Clock
TS output clock in parallel mode
TS output clock in serial mode
F
F
F
9.61
9.61
12.5
83
MHz
MHz
5
5
TS0_CLK, TS1_CLK
F
TS0_CLK, TS1_CLK
Transport Stream Input Mode Reference Clock
TS input clock in parallel mode
TS input clock in serial mode
F
F
F
13.5
83
MHz
MHz
TS0_CLK, TS1_CLK
F
TS0_CLK, TS1_CLK
Transport Stream External Reference Clock
TS external clock in parallel mode
TS external clock in serial mode
F
F
9.61
9.61
12.5
83
MHz
MHz
5
5
EXT_CLK
EXT_CLK
Doc. No. MV-S104859-U0 Rev. E
Page 86
Copyright © 2008 Marvell
December 2, 2008, Preliminary
Document Classification: Proprietary Information
MARVELL [ MARVELL TECHNOLOGY GROUP LTD. ]
