AcroPack Series XMCAP2022
XMC Carrier Board
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3.
PROGRAMMING INFORMATION
This XMCAP2022 carrier board has no end user programmable components.
The PCIe switch on the carrier is transparent to the end user.
4.
THEORY OF OPERATION
This section describes the functionality of the circuitry used on the carrier
board. Refer to Figure 6 as you read this section.
Figure 6 XMCAP2022 AcroPack Carrier Block Diagram
PCIe SWITCH
The PCIe switch is a 6 port 8 lane PCIe Gen 2 switch. It expands the single host
PCIe port to two ports, one for each AcroPack site. The host port consists of
four PCIe lanes, each of the AcroPack sites have one lane each.
Important Note:
The XMCAP2022 board is not hot-swappable.
DC/DC CONVERTERS
The XMCAP2022 has four DC/DC converters to provide the power supply
voltages to the AcroPack modules that are not present at the host interface.
The +1.5V supply is sourced from the VPWR host power. The +5 Volt, +12
Volt, and -12V supplies are sourced from +3.3 Volt host power.
SLOT ADDRESSING
The XMCAP2022 carrier can be assigned by a combination of host supplied
Geographical Addressing bits and/or by selecting the appropriate
combination of SW1 switch settings. The slot address is 8 bits long and