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User Guide XB1 COM Express Module
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J-COM
J-COM is the pair of connectors which serves as interface between the XB1 COM Express Module and
the carrier board. The assembly is composed of two double-row, high speed, 0.5mm pitch plugs.
Each row has 110 leads, i.e. J-COM provides 440 contact positions in total. The COM.0 specification
assigns each row a letter A, B and C, D. For Type 1 COM Express modules, rows A and B are sufficient
(single connector, 220 leads). In addition, rows C and D (dual connector, 440 positions) are required
for extended functionality incorporated into Type 2 modules such as the XB1.
AB#CD
GND GND 1 GND GND
ETH_MX3- 1) ETH_LKACT# 1) 2 IDE_D7 IDE_D5
ETH_MX3+ 1) LPC_FRAME# 3 IDE_D6 IDE_D10
ETH_LK100# 1) LPC_AD0 4 IDE_D3 IDE_D11
ETH_LK1000# 1) LPC_AD1 5 IDE_D15 IDE_D12
ETH_MX2- 1) LPC_AD2 6 IDE_D8 IDE_D4
ETH_MX2+ 1) LPC_AD3 7 IDE_D9 IDE_D0
ETH_LKACT# 1) LPC_DRQCOM# (LPC_DRQ0#) 8 IDE_D2 IDE_DREQ
ETH_MX1- 1) LPC_DRQ1# 9 IDE_D13 IDE_IOW#
ETH_MX1+ 1) CLK_33LPC (LPC_CLK) 10 IDE_D1 IDE_DACK#
GND GND 11 GND GND
ETH_MX0- PWRBTN# 12 IDE_D14 IDE_IRQ
ETH_MX0+ SMB_CLK 13 IDE_IORDY IDE_A0
+2.5V (ETH_CTREF) SMB_DATA 14 IDE_IOR# IDE_A1
ICH_SLP_S3# (SUS_S3#) SMB_ALERT# 15 PCI_PME# IDE_A2
SATA_0TP SATA_1TP 16 PCI_GNT2# IDE_CS1#
SATA_0TN SATA_1TN 17 PCI_REQ2# IDE_CS3#
ICH_SLP_S4# (SUS_S4#) SUS_STAT# 18 PCI_GNT1# IDE_RST#
SATA_0RP SATA_1RP 19 PCI_REQ1# PCI_GNT3#
SATA_0RN SATA_1RN 20 PCI_GNT0# PCI_REQ3#
GND GND 21 GND GND
SATA_2TP SATA_3TP 22 PCI_REQ0# PCI_AD1
SATA_2TN SATA_3TN 23 PCI_RST# PCI_AD3
ICH_SLP_S5# (SUS_S5#) PWR_OK 24 PCI_AD0 PCI_AD5
SATA_2RP SATA_3RP 25 PCI_AD2 PCI_AD7
SATA_2RN SATA_3RN 26 PCI_AD4 PCI_CBE0#
BATLOW# WDOGRST (WDT) 27 PCI_AD6 PCI_AD9
SATA_ACT# AC_SDIN2 28 PCI_AD8 PCI_AD11
AC_SYNC AC_SDIN1 29 PCI_AD10 PCI_AD13
AC_RST# AC_SDIN0 30 PCI_AD12 PCI_AD15