
Getting Started
Intel
®
Atom™ Processor E660 with Intel
®
Platform Controller Hub EG20T Development Kit
User Manual
January 2012
28
Document Number: 324213-002
Figure 8.
Clock Circuit Diagram in the Carrier Board
USB_CLK
Intel® PCH EG20T
SYSCLK
25.0MHz
SPXO
COMe*
Connector
48MHz
SPXO
UART_CLK
1.8432MHz
SPXO
(DIP Socket)
GbE-PHY
TXC
RXC
25.0MHz
X’tal
125MHz
50MHz
I2C
400KHz
5MHz
SMB_CK
SMB_DAT
PCIE0/-
PCIe to PCI Bridge
PCIe* slot #2,#3 /
mini PCIe slot
PCI slot #4
33MHz
SD-card
SPI
4MHz(*1)
UART
1MHz
CAN
75.0MHz
LVDS_CG
PCIe_CLKT
PCIe_CLKC
SATA_CLKT
SATA_CLKC
25MHz
X’tal
125MHz
CPLD
GCLK0
XTAL1
Codec
XTAL2
48kHz
HDA SYNC
12.228MHz
HDA BITCLK
LPC_33MHZ_CLK
LPC Header
LPC_CLK
PCI CLK
SIO (SMSC 47M172)
33MHz
CLOCKI
CLOCKI32
32.768kHz
SPXO
14.318MHz
SPXO
MCLK/
KCLK
PS/2
KB/MOUSE
LVDS_A/B_CK+/-
*1: One of the UART port is up to 4Mbps baud rate clock, the other ports are up to 1Mbps.
TPM_33MHZ_CLK
TPM Header
LVDS_I2C_CK
LVDS Connector
SDVO_CLK
SDVO_DATA
SDVO slot
LVDS_I2C_DAT
LPC_CLKRUN_N
LPC_CLKRUN_N
PCI_CLKRUN#
EMPTY
CLK
Buffer
(*2)
*2: LPC CLK Buffer is no PLL locked type. (e.g. ICS553 )
100MHz
PCIe*
CLK
Buffer