EP80579 Datasheet, PDF (1829/1916 Pages) Intel Corporation – Intel® EP80579 Integrated Processor Product Line

Intel^® EP80579 Integrated Processor
49.3
Clocks
49.3.1
External Clock Requirements
External clocks are supplied to the internal PLLs as the reference clock and to the other
I/O devices. The EP80579 has internal PLLs that use the reference clock to generate
the internal clocks. Table 49-9 shows the external clocks that must be supplied for the
EP80579 and its external interfaces.
Table 49-9. Platform External/Internal Clock Interface
Clock Domain
DDR2
GbE
CRU Clock
PCI Express*
Serial ATA
USB2
UART
LPC
Expansion Bus
CLK14
TDM
SSP
RTC
SUSCLK
SMBus
SPI
Frequency
200/266/320/400 MHz
2.5, 25, 125 MHz
100/133 MHz
100 MHz
100 MHz
48 MHz
48/14.7456 MHz
33 MHz
33/80 MHz
14.31818 MHz
512 kHz to 8.192 MHz
3.864 MHz
32.768 KHz
32.768 KHz
10-100 KHz
17.86 MHz
Source
Internal
External
External
External
External
External
External
External
External
External
External
External
External
Internal
External
Internal
August 2009
Order Number: 320066-003US
Intel^® EP80579 Integrated Processor Product Line Datasheet
1829