11. I/O EXPANSION & CoM Express SOCKETS

This page describes the expansion sockets & CoM Express connector available on Athena IV.

The functionalities on Athena IV is enhanced by the expansion sockets available on-board. There are two I/O expansion sockets & one CoMEx socket on Athena IV.

The two I/O expansions sockets present on Athena IV are:

1. PC/104

2. M.2 SATA

Apart from I/O expansion, Athena IV also hosts a CoM Express AB connector. This connector is used to connect the Type 10 CoMEx Mini CPU module.

The pinout details of these sockets are briefed below.

11.1 PC/104 Expansion Connectors [J1, J2]

The ISA interface on Athena IV is accessed on PC/104 connectors. PC/104 connectors are a combination of two connectors; 2x32 connector & 2x20 connector. The 2x32 connector hosts the 8-bit ISA I/O cards. For added 16-bit ISA I/O support, the 2x20 connector is used. Athena IV supports interrupts, 8-bit & 16-bit transactions on the ISA bus.

The PC/104 connectors are press-fit stack through connectors. The ISA I/O cards can be either mounted on the top or the bottom. However, the ISA I/O are recommended to be mounted on the bottom side. This is to avoid blocking airflow over the top-side heat sink on Athena IV.

The 64-pin connector incorporates the 8-bit bus connector signals, and the 40-pin header incorporates the 36-pin 16-bit bus connector signals.

The resources available for external ISA cards are provided below:

For E3845 CoM

Available ISA Address Ranges: 0x100 - 17F, 0x200 - 0x28F, 0x300 - 0x37F

Available ISA IRQs: 5, 7, 9, 10, 11, 12, 13, 15

For E3940/E3950 CoMs

Pinouts are as shown below:

Connector PN: J1; EPT# 962-60323-12, J2; EPT# 962-60203-12

11.2 M.2 SATA [J10]

Athena IV provides an M-Keyed 2230 size socket for storage applications. Pinouts are as shown below:

NOTE: The NC pins are not connected on Athena IV.

Connector PN: MDT320M03001

11.3 CoM Express Module [J18]

A 220-pin connector is used to mount the CoMEx CPU module. Pinouts are as shown below:

GND	A1	B1	GND
GBE0_MDI3-	A2	B2	GBE0_ACT#
GBE0_MDI3+	A3	B3	LPC_FRAME#
GBE0_LINK100#	A4	B4	LPC_AD0
GBE0_LINK1000#	A5	B5	LPC_AD1
GBE0_MDI2-	A6	B6	LPC_AD2
GBE0_MDI2+	A7	B7	LPC_AD3
GBE0_LINK# (NC)	A8	B8	LPC_DRQ0# (NC)
GBE0_MDI1-	A9	B9	LPC_DRQ1# (NC)
GBE0_MDI1+	A10	B10	LPC_CLK
GND	A11	B11	GND
GBE0_MDI0-	A12	B12	PWRBTN#
GBE0_MDI0+	A13	B13	SMB_CK
GBE0_CTREF (NC)	A14	B14	SMB_DAT
SUS_S3#	A15	B15	SMB_ALERT# (NC)
SATA0_TX+	A16	B16	SATA1_TX+
SATA0_TX-	A17	B17	SATA1_TX-
SUS_S4#	A18	B18	SUS_STAT#
SATA0_RX+	A19	B19	SATA1_RX+
SATA0_RX-	A20	B20	SATA1_RX-
GND	A21	B21	GND
USB_SSRX0-	A22	B22	USB_SSTX0-
USB_SSRX0+	A23	B23	USB_SSTX0+
SUS_S5#	A24	B24	PWR_OK
USB_SSRX1- (NC)	A25	B25	USB_SSTX1- (NC)
USB_SSRX1+ (NC)	A26	B26	USB_SSTX1+ (NC)
BATLOW# (NC)	A27	B27	WDT (NC)
ATA_ACT#	A28	B28	AC_SDIN2 (NC)
AC_SYNC	A29	B29	AC_SDIN1 (NC)
AC_RST#	A30	B30	AC_SDIN0
GND	A31	B31	GND
AC_BITCLK	A32	B32	SPKR
AC_SDOUT	A33	B33	I2C_CK
BIOS_DIS0#	A34	B34	I2C_DAT
THRMTRIP# (NC)	A35	B35	THRM# (NC)
USB6- (NC)	A36	B36	USB7- (NC)
USB6+ (NC)	A37	B37	USB7+ (NC)
USB_6_7_OC# (NC)	A38	B38	USB_4_5_OC# (NC)
USB4-	A39	B39	USB5- (NC)
USB4+	A40	B40	USB5+ (NC)
GND	A41	B41	GND
USB2-	A42	B42	USB3-
USB2+	A43	B43	USB3+
USB_2_3_OC# (NC)	A44	B44	USB_0_1_OC# (NC)
USB0-	A45	B45	USB1-
USB0+	A46	B46	USB1+
VCC_RTC	A47	B47	EXCD1_PERST# (NC)
EXCD0_PERST# (NC)	A48	B48	EXCD1_CPPE# (NC)
EXCD0_CPPE# (NC)	A49	B49	SYS_RESET#
LPC_SERIRQ	A50	B50	CB_RESET#
GND	A51	B51	GND
RSVD (NC)	A52	B52	RSVD (NC)
RSVD (NC)	A53	B53	RSVD (NC)
SD_DATA0 (NC)	A54	B54	SD_CMD (NC)
RSVD (NC)	A55	B55	RSVD (NC)
RSVD (NC)	A56	B56	RSVD (NC)
GND	A57	B57	SD_WP (NC)
PCIE_TX3+ (NC)	A58	B58	PCIE_RX3+ (NC)
PCIE_TX3- (NC)	A59	B59	PCIE_RX3- (NC)
GND	A60	B60	GND
PCIE_TX2+	A61	B61	PCIE_RX2+
PCIE_TX2-	A62	B62	PCIE_RX2-
SD_DATA1 (NC)	A63	B63	SD_CD# (NC)
PCIE_TX1+	A64	B64	PCIE_RX1+
PCIE_TX1-	A65	B65	PCIE_RX1-
GND	A66	B66	WAKE0#
SD_DATA2 (NC)	A67	B67	WAKE1# (NC)
PCIE_TX0+	A68	B68	PCIE_RX0+
PCIE_TX0-	A69	B69	PCIE_RX0-
GND	A70	B70	GND
LVDS_A0+	A71	B71	DDI0_PAIR0+
LVDS_A0-	A72	B72	DDI0_PAIR0-
LVDS_A1+	A73	B73	DDI0_PAIR1+
LVDS_A1-	A74	B74	DDI0_PAIR1-
LVDS_A2+	A75	B75	DDI0_PAIR2+ (NC)
LVDS_A2-	A76	B76	DDI0_PAIR2- (NC)
LVDS_VDD_EN	A77	B77	DDI0_PAIR4+ (NC)
LVDS_A3+	A78	B78	DDI0_PAIR4- (NC)
LVDS_A3-	A79	B79	LVDS_BKLT_EN
GND	A80	B80	GND
LVDS_A_CLK+	A81	B81	DDI0_PAIR3+ (NC)
LVDS_A_CLK-	A82	B82	DDI0_PAIR3- (NC)
LVDS_I2C _CK (NC)	A83	B83	LVDS_BKLT_CTRL
LVDS_I2C_DAT (NC)	A84	B84	VCC_5V_SBY
SD_DATA3	A85	B85	VCC_5V_SBY
RSVD (NC)	A86	B86	VCC_5V_SBY
RSVD (NC)	A87	B87	VCC_5V_SBY
PCIE0_CK_REF+	A88	B88	BIOS_DIS1#
PCIE0_CK_REF-	A89	B89	DDI0_HPD
GND	A90	B90	GND
SPI_POWER	A91	B91	DDIO_PAIR5+ (NC)
SPI_MSIO	A92	B92	DDIO_PAIR5- (NC)
SD_CLK (NC)	A93	B93	DDIO_PAIR6+ (NC)
SPI_CKL	A94	B94	DDIO_PAIR6- (NC)
SPI_MOSI	A95	B95	DDI0_DDC_AUX_SEL (NC)
TPM_PP (NC)	A96	B96	USB_HOST_PRSNT (NC)
TYPE10# (NC)	A97	B97	SPI_CS#
SER0_TX	A98	B98	DDI0_CTRLCLK_AUX+
SER0_RX	A99	B99	DDI0_CTRLCLK_AUX-
GND	A100	B100	GND
SER1_TX (NC)	A101	B101	FAN_PWMOUT (NC)
SER1_RX (NC)	A102	B102	FAN_TACHIN (NC)
LID# (NC)	A103	B103	SLEEP# (NC)
VCC_5V	A104	B104	VCC_5V
VCC_5V	A105	B105	VCC_5V
VCC_5V	A106	B106	VCC_5V
VCC_5V	A107	B107	VCC_5V
VCC_5V	A108	B108	VCC_5V
VCC_5V	A109	B109	VCC_5V
GND	A110	B110	GND

NOTE: The NC pins are not connected on Athena IV.

Connector PN: Foxconn# QT002206-4131-3H