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Type 6 Carrier Board Design Guide
Page 33
CLK100M_PCIEx1_SLOT2+5
R20 33_412
CLK100M_PCIEx1_SLOT2-5
R21 33_412
CLK100M_PCIEx16_SLOT- 6
CLK100M_PCIEx16_SLOT+ 6
R2433_4 1 2
CLK_OE_4
R2633_4 1 2
CLK_OE_3
SMB_DAT3,5,6, 10, 11,17,20
SMB_CK3,5,6, 10, 11,17,20
CLK_PLL
CLK100M_PCIEx1_SLOT5- 10
CLK100M_PCIEx1_SLOT5+ 10
CLK100M_PCIEx1_SLOT3-5
CLK100M_PCIEx1_SLOT3+5
R22 33_412
R23 33_412
R113 33_412
R112 33_412
+V3.3_CLK +V3.3_CLK
+V3.3_CLK_A
CLK_OE_6
CLK100M_PCIEx1_SLOT1+5
CLK_LOCK
CLK_OE_1
R10 475
R114 33_412
CLK_IREF
R115 33_412
CLK100M_PCIEx1_SLOT1-5
CLK100M_PCIEx1_SLOT4+5
R25 33_412
CLK100M_PCIEx1_SLOT4-5
R27 33_412
CLK100M_PCIE_R EF -3
CLK100M_PCIE_R EF +3
R16 33_412
CLK_OE_5
R18 33_412
CLK_OE_2
CLK100M_PCIEx1_SLOT6- 10
CLK100M_PCIEx1_SLOT6+ 10
CLK_HBW#
CLK_SRC_SOP#
CLK_PD#
U1
ICS9DB801
SRC_DIV#
1
VDD01
2
GND01
3
SRC_IN
4
SRC_IN#
5
OE_0
6
OE_3
7
DIF_0
8
DIF_0#
9
GND02
10
VDD02
11
DIF_1
12
DIF_1#
13
OE_1
14
OE_2
15
DIF_2
16
DIF_2#
17
GND03
18
VDD03
19
DIF_3
20
DIF_3#
21
BYPASS#/PLL
22
SCLK
23
SDATA
24
GND05
25
PD#
26
SRC_SOP#
27
HIGH_BW#
28
DIF_4#
29
DIF_4
30
VDD05
31
GND04
32
DIF_5#
33
DIF_5
34
OE_5
35
OE_6
36
DIF_6#
37
DIF_6
38
VDD04
39
OE_INV
40
DIF_7#
41
DIF_7
42
OE_4
43
OE_7
44
LOCK
45
IREF
46
GNDA
47
VDDA
48
CLK_OE_7
TP3 2
1
CLK_DIV#
TP3 3
1
CLK_OE_0
Figure 3-10: PCI Express Clock Buffer Example
3.3 SATA (Serial ATA Interface)
Serial ATA is a serial interface for connecting storage devices (mainly hard disks). SATA
uses a point-to-point serial connection between the system and the storage device. The
first-generation SATA provides a maximum data transfer rate of 1.5Gb/s per port. The
second generation SATA 3Gb/s provides transfer rate of up to 3Gb/s per port while the
third generation SATA 6Gb/s provides transfer rate of up to 6Gb/s. Serial ATA is
completely software transparent to the IDE interface while providing a lower pin count and
higher performance.
3.3.1 Signal Description
All COM Express modules provide up to four Serial ATA channels, each with a receive
and transmit differential signal pair. The appropriate signals can be found on the COM
Express module connector row A and row B.
Pin Signal I/O Description
A19
A20
SATA0_RX+
SATA0_RX-
I SATA Serial ATA channel 0 Receive input differential pair.
A16
A17
SATA0_TX+
SATA0_TX-
O SATA Serial ATA channel 0 Transmit output differential pair.
B19
B20
SATA1_RX+
SATA1_RX-
I SATA Serial ATA channel 1 Receive input differential pair.
B16
B17
SATA1_TX+
SATA1_TX-
O SATA Serial ATA channel 1 Transmit output differential pair.
A25 SATA2_RX+ I SATA Serial ATA channel 2 Receive input differential pair.
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