PT AMC123, User Manual

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Chapter 2: Introduction
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Ethernet Interfaces
The Intel EP80579 Integrated Processor on the AMC123 includes three Gigabit Ethernet
controllers that route three GbE ports in one of the following configurations:
• One port via the front panel, and two ports via the AMC card edge connector (AMC.2 - AMC Ports 0
and 1), or
• Two ports via the front panel, and one port via the AMC card edge connector (AMC.2 - AMC Port 0)
The Intel EP80579 Integrated Processor GbE controllers are based on an Intel fourth
generation Gigabit MAC to provide a standard IEEE 802.3 Ethernet interface for 1000BASE-T,
100BASE-TX, and 10BASE-T applications. Each controller is capable of transmitting and
receiving data rates of 10/100/1000 Mbps.
The three RGMII Ethernet ports are supported by an on-board quad PHY (Marvell 88E1145
Quad GbE Transceiver). Two GbE ports on the front panel are sourced from the Intel EP80579
Integrated Processor. These front panel RJ45 connectors each have two LED Indicators to
denote the status of each channel. See
“Ethernet Link and Activity LEDs,” on page 32 . Two
1Gb SerDes Ethernet ports routed to the AMC card edge connector allow interfacing to other
AMC cards on the same carrier or interfacing with a hub or switch on a carrier. A serial
EEPROM provides configuration information to the GbE controllers upon power-up or reset.
See “SW4-2 — Ethernet Port 1 Control,” on page 44 for switch settings for routing Ethernet
Port 1.
The topic “Ethernet,” on page 104 , contains links to the datasheets for the Intel EP80579
Integrated Processor and the PHY device. Connector locations and pinouts for the AMC card
edge and RJ45 connectors are documented in
Chapter 5, “Connectors,” on page 79 .
Real-Time Clock with Battery Backup
The AMC123 features a real-time clock (RTC), which is integrated into the Intel EP80579
Integrated Processor. The RTC performs timekeeping functions and includes 256 bytes of
battery-backed CMOS RAM in two banks (128 bytes each). This device contains the year,
month, date, day, hours, minutes and seconds. The clock operates in 12- or 24-hour format,
and data can be represented in binary-coded decimal (BCD) or binary format. Corrections are
automatically made for 28, 29, 30 and 31 day months, including leap year. The time keeping
comes from a 32.768 KHz oscillating source, which is divided to achieve an update every
second.
An alarm clock function is provided on this device, with one second minimum resolution, that
can be enabled to set an alarm flag.
Batteries
Two rechargeable manganese-lithium ML621 coin-cell batteries located on the AMC123 in two
surface mount battery clips power the RTC and CMOS memory when the AMC123 is not
powered externally. The batteries are intended for AC power failure only, have an estimated life
of 60 days (with batteries fully charged), and recharge whenever management power is
present. The AMC123’s RTC resides in the Intel EP80579 Integrated Processor. See
“Processor,” on page 103 for a link to the data sheet for this device.
See “Battery Backup Characteristics,” on page 94 .