Table 3-23. PCIe Connector (J27) Pin-out (continued)
Pin No.
Side A of PCIe
Connector GP Board Signal
Side B of PCIe
Connector GP Board Signal
20 GND GROUND PETn1 NC
21 PERp1 NC GND GROUND
22 PERn1 NC GND GROUND
23 GND GROUND PETp2 NC
24 GND GROUND PETn2 NC
25 PERp2 NC GND GROUND
26 PERn2 NC GND GROUND
27 GND GROUND PETp3 NC
28 GND GROUND PETn3 NC
29 PERp3 NC GND GROUND
30 PERn3 NC RSVD3 NC
31 GND GROUND PRSNT2#_2 NC
32 RSVD2 NC GND GROUND
3.4.13 High Speed Expansion Interface
The GP board has a high-speed expansion connector allowing connections to the ICSSG and GPMC capabilities
of the AM64x/AM243x. A single high speed connector with part number SEAF-30-06.0-L-05-2-A-K-TR is used
on the EVM. All the signals associated with the ICSSG0 interface is routed to the expansion connector. In
addition, the data and command signals for the GPMC are routed to the AM64x/AM243x as well.
The trace signal is routed to either the high-speed expansion connector or the MIPI60 connector. Zero-Ohm
resistor are used to minimize the disruption to the routing. The default configuration will have the resistors
installed thereby routing the signals to the HSE connector. The MIPI60 is not installed by default.
One FSI transmit channel and one FSI receive channel is required to connect with the C2000 EVM. These
signals from SoC are terminated on 2x5 header with part number 67997-410HLF from Amphenol ICC (FCI).
These signals are muxed so that they are available to both the FSI connector and the expansion connector.
FSI_TX0 signals and FSI_RX0 signals are connected to the mux. The mux is controlled by jumper. The default
state drives the signals from the AM64x/AM243x to the HSE connector unless the jumper is installed. The
boards will be delivered with the jumper installed.
Additional signals like UART4, I2C0, SPI1 and GPIOs are connected to the HSE connector to provide additional
connectivity options.
Necessary voltages such as 5 V, 3V3, 1V8 are provided to the HSE connector and these voltages are connected
through current limiting switches ensuring that an accidental short on the connector will not damage the EVM.
The connector includes a presence detect pin that will be grounded on the application board. This is connected
to the ExpBrdDetect signal on the I2C presence detect buffer. A board ID memory is included in external HSE
board and programmed to identify the board. I2C3 Pinmuxed with MCAN1 and UART4 pinmuxed with MCAN0
are routed to HSE Connector.
Note
The following net names do not indicate an exhaustive list of pin capabilities and available signal
functions. For a full list of available secondary multiplexing of signal functions implemented in device
subsystems, see the EVM Schematic, Sysconfig Tool and device-specific data sheet.
System Description
www.ti.com
46 AM64x/AM243x GP EVM User's Guide SPRUIX0C – FEBRUARY 2021 – REVISED JUNE 2021
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