DAMC-FMC20 User’s Manual
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UART debug interface (over UART-to-USB translator);
Transceiver FPGA SPI FLASH programming (2 memories);
Transceiver FPGA control (reset, reboot etc.).
2.4.3
I2C Buses
MMC on DAMC-FMC20 has four independent I2C buses: Bus one is connected
to the AMC interface (IPMI-B), Bus two is connected to the RTM using an I2C
isolator and Bus three is connected to on-board sensors. Addresses are: 0x51 for serial
number IC, 0x38 for I2C expander and 0x49 for temperature monitor.
A schematic is presented below:
MMC V1.0
Atxmega
128
FMC1
JTAG
FMC2
JTAG
AMC Connector
Bus 1
Bus 3
Bus 4
Serial
Number
+
2KB EEPROM
I2C
Expander
Temp.
Monitor
Bus 2
RTM Connector
Address:
101.0001
Address:
011.1000
Address:
100.1001
I2C
Isolator
2.4.1
AMC Connectivity
Available connections are presented in the below table:
Channel
Signal
Voltage levels
Protocol/Signal
Remarks
4
PCIe x1 (lane 0)
CML
AMC.1
PCIe Bus
12
cross point switch CML
custom
RIO (Xilinx)
13
cross point switch CML
custom
RIO (Xilinx)
14
cross point switch CML
custom
RIO (Xilinx)