PT AMC131, Hardware Manual

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Chapter 3: Getting Started
38
Switch Descriptions
The following sections present the AMC131 switches in numerical order and provide a detailed
description of each switch. Multiple-position switches are identified in the form of
SWx-N ,
where x is the switch number and -N is the switch position. For example, SW2-3 means “switch
number 2, position 3.”
Note: PCIe-only AMC131 boards at revisions 120Q060960 and lower have only one DIP
switch. The settings for SW2 in this document must be applied to the switch marked SW1 on
those boards.
SW1 (Serial Rapid IO Configurations)
Note: All switches must be set prior to power-on reset.
SW1-1: SRIO System Size
The Rapid IO Common Transport Specification defines two system sizes:
• The large size that uses 16-bit source and destination IDs, allowing for 65,536 devices
• The small size that uses 8-bit source and destination IDs, supporting 256 devices
SW1-1 sets the SRIO controller system size as shown in Table 3-1 .
SW1-2 - SW1-4: SRIO Device IDs (small system only)
If large size is selected with SW1-1, SW1-2 - SW1-4 settings are ignored. If small size is
selected, SW1-2 - SW1-4 are used to set configuration device ID bits 5 - 7 as shown in
Table
3-2 .
If configured as a SRIO Host (see SW2-1: PCIe Root Complex/Endpoint - SRIO Host/Agent
below) then the device ID is 0b0000_0||cfg_device_id[5:7].
If configured as a SRIO Agent:
• If cfg_dev_ID[7] input = 0, then the device ID is 0xFE and
• If cfg_dev_ID[7] input = 1, then the device is a generic, undiscovered endpoint with a device ID of
0xFF.
Table 3-1: Setting SRIO System Size
SW1-1 Function
OFF Set the SRIO controller system size as large
ON (Default) Set the SRIO controller system size as small
Table 3-2: Setting SRIO Device IDs
Switch OFF ON (Default)
SW1-2 Device ID bit 5 set to 0 Device ID bit 5 set to 1
SW1-3 Device ID bit 6 set to 0 Device ID bit 6 set to 1
SW1-4 Device ID bit 7 set to 0 Device ID bit 7 set to 1