Ampro Corporation COM 830 Connector Subsystems Rows A, B, C, D, Primary Connector Rows A and B

Chapter 2 Specifications

COM 830 Reference Manual 13

Connector Subsystems Rows A, B, C, D

The COM 830 is connected to the carrier board via two 220-pin connectors (COM Express Type 2 pinout)

for a total of 440 pins connectivity. These connectors are broken down into four rows. The primary

connector consists of rows A and B while the secondary connector consists of rows C and D.

In this view the connectors are seen “through” the module.

Primary Connector Rows A and B

The following subsystems can be found on the primary connector rows A and B.

Two Serial ATA150 connections are provided via the Intel® 82801GHM (ICH7M-DH). SATA is an

enhancement of the parallel ATA therefore offering higher performance. As a result of this enhancement the

traditional restrictions of parallel ATA are overcome with respect to speed and EMI. SATA starts with a

transfer rate of 150 Mbytes/s and can be expanded up to 600 Mbytes/s in order to accommodate future

developments. SATA is completely protocol and software compatible to parallel ATA.

The COM 830 offers 4 UHCI USB host controllers and one EHCI USB host controller provided by the

Intel�� 82801GHM (ICH7M-DH). These controllers comply with USB standard 1.1 and 2.0 and offer a total

of 8 USB ports via connector rows A and B.

The COM 830 provides an interface that supports the connection of AC'97 digital audio codecs as well as

HDA audio codecs.

The COM 830 is equipped with a Marvell 88E8056 Gigabit Ethernet Controller. This controller is

implemented through the use of the sixth x1 PCI Express lane. The Ethernet interface consists of 4 pairs of

low voltage differential pair signals designated from GBE0_MD0 (+ and -) to GBE0_MD3 (+ and -) plus

control signals for link activity indicators. These signals can be used to connect to a 10/100/1000 BaseT

RJ45 connector with integrated or external isolation magnetics on the carrier board.

COM 830 offers the LPC (Low Pin Count) bus through the use of the Intel® 82801GHM (ICH7M-DH).

There are already many devices available for this Intel defined bus. The LPC bus corresponds approximately

to a serialized ISA bus yet with a significantly reduced number of signals. Due to the software compatibility

to the ISA bus, I/O extensions such as additional serial ports can be easily implemented on an application

specific baseboard using this bus.

The I²C bus is implemented through the use of ATMEL ATmega168 microcontroller. It provides a Fast

Mode (400kHz max.) multi-master I²C Bus that has maximum I²C bandwidth.

NOTE The USB controller is a PCI bus device. The BIOS allocates the necessary

system resources when configuring the PCI devices.