Synchronization Clock Interface; System Management Interface; Jtag Interface; Module Power Interface - Kontron AM4024 User Manual

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2.8.2 Synchronization Clock Inter face

On the AM4024(E), two PCI Express reference clock configurations are supported in accordance with

the PCI Express Base Specification Revision 3.0 as follows:

AM4024(E) uses local PCI Express reference clock, and AMC (input) clock (FCLKA) is disabled.

In this configuration, the clock spread spectrum modulation must be disabled.

AM4024(E) uses local PCI Express reference clock, and AM4024(E) generates PCI Express ref-

erence clock to the AMC Card-edge connector (FCLKA)

The PCI Express reference clock configurations can be set via the uEFI BIOS kBoardConfig command,

option AMCFclka.

2.8.3 System Management Inter face

The system management interface is a port from the module to the carrier via the Local Intelligent Plat-

form Management Bus (IPMB-L). The Module Management Controller uses this port for the communi-

cation with the carrier Intelligent Platform Management Controller (IPMC). The IPMB-L is a multi-

master I²C bus.

2.8.4 JTAG Inter face

JTAG support is provided on the AMC Card-edge connector. The JTAG interface is supported for vendor

product test and logic update.

On the AM4024(E), the FPGA JTAG port is connected to the AMC JTAG port.

2.8.5 Module Power Inter face

The module power interface provides the management power (MP) and the payload power (PWR). These

two supply voltages must have power-good indicators so that the system management can detect boot

sequence events and nominal operating conditions.

The AM4024(E) operates with payload power in the range of 10.8 V to 13.2 V, and with management

power of 3.3 V ± 5%.

The board supports removal and insertion in a powered slot as required by the AMC.0 specification.

The AMC Card-edge connector is a high-speed serial interface with 170 pins. The following table pro-

vides the pinout of the AMC Card-edge connector J1. The shaded table cells indicate signals that are

not used on the AM4024(E).

Note:

When handling the board, take care not to touch the gold conductive fingers of the AMC

Card-edge connector. Failure to comply with the instruction above may cause damage to

the board or result in improper system operation.

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