# # Sensor I2C Bus - Nets # --------------------------- # # # Original Rev. 14-Dec-2015 # Current Rev. 21-Oct-2016 # # # This file holds all of the nets for the Sensor I2C Bus # and its associated buffer/translators. # # # # Connect Power and Ground and ByPass Caps # to the I2C Buffer/Translators # # Note the different Bulk_3V3 and Ground connections: # U1501 buffers to a 3V3 I2C bus # U1502 and U1503 buffer to 1V8 I2C buses # NET 'Bulk_3V3' U1501-12 C1501-1 C1502-1 U1501-11 NET 'GROUND' U1501-6 C1501-2 C1502-2 NET 'Bulk_3V3' U1502-12 C1511-1 C1512-1 NET 'GROUND' U1502-6 C1511-2 C1512-2 U1502-11 NET 'Bulk_3V3' U1503-12 C1521-1 C1522-1 NET 'GROUND' U1503-6 C1521-2 C1522-2 U1503-11 # # Connect the Pull-Up Resistors to the various # control and monitor pins on the Buffer/Translator chips # NET 'I2C_Buf_1501_DISCEN' U1501-2 R1503-1 NET 'I2C_Buf_1501_ACC_B' U1501-5 R1504-1 NET 'I2C_Buf_1501_READY' U1501-7 R1505-1 NET 'I2C_Buf_1501_ENABLE' U1501-1 R1506-1 NET 'Bulk_3V3' R1503-2 R1504-2 R1505-2 R1506-2 NET 'I2C_Buf_1502_DISCEN' U1502-2 R1513-1 NET 'I2C_Buf_1502_ACC_B' U1502-5 R1514-1 NET 'I2C_Buf_1502_READY' U1502-7 R1515-1 NET 'I2C_Buf_1502_ENABLE' U1502-1 R1516-1 NET 'Bulk_3V3' R1513-2 R1514-2 R1515-2 R1516-2 NET 'I2C_Buf_1503_DISCEN' U1503-2 R1523-1 NET 'I2C_Buf_1503_ACC_B' U1503-5 R1524-1 NET 'I2C_Buf_1503_READY' U1503-7 R1525-1 NET 'I2C_Buf_1503_ENABLE' U1503-1 R1526-1 NET 'Bulk_3V3' R1523-2 R1524-2 R1525-2 R1526-2 # # Now connect the ENABLE pins on the 3 I2C Buffer/Translators # to Select I/O pins in a 3V3 Bank of the Hub Virtex FPGA. # NET 'I2C_Buf_1501_ENABLE' U1-BA16 # IO_L3P_T0L_N4_AD15P_94 NET 'I2C_Buf_1502_ENABLE' U1-BA15 # IO_L1N_T0L_N1_DBC_94 NET 'I2C_Buf_1503_ENABLE' U1-BB16 # IO_L4N_T0U_N7_DBC_AD7N_94 # # Now connect the Sensor I2C Bus from the IPMC # to the "in" side of the 3x I2C Buffer/Translators. NET 'IPMC_Sensor_I2C_Bus_SCL' IPMC-183 NET 'IPMC_Sensor_I2C_Bus_SCL' U1501-4 U1502-4 U1503-4 NET 'IPMC_Sensor_I2C_Bus_SDA' IPMC-184 NET 'IPMC_Sensor_I2C_Bus_SDA' U1501-9 U1502-9 U1503-9 # # Now connect the Sensor I2C Bus (that runs between the # IPMC and the "in" side of the 3x I2C Buffer/Translators) # to the J2 Front Panel connector pins 11 and 12. NET 'IPMC_Sensor_I2C_Bus_SCL' J2-11 NET 'IPMC_Sensor_I2C_Bus_SDA' J2-12 # # Now connect the I2C Buses on the "output" side of their # I2C Buffer/Translator chips. Connect their pull-up resistors. # # NOTE: The pull-up resistors for the I2C Bus that runs # to the Hub's 7x DCDC Converters pull up to 3V3. # # The pull-up resistors for the I2C Bus that runs # to the Hub FPGA SysMon port and Master port # pull up to 1V8. # # YES, there are two connections of the # Sensor I2C Bus to the Hub FPGA: # # - Connect to its defined SysMon I2C pins. # # - Connect to a second set of pins to provide # for an I2C Bus Master in the Hub FPGA, e.g. # to allow us to control the DC/DC Conveters. # # The pull-up resistors for the Sensor I2C Bus that # runs to the ROD mezzanine are on the ROD itself. # NET 'Hub_PMBus_SCL' U1501-3 R1501-1 NET 'Hub_PMBus_SDA' U1501-10 R1502-1 NET 'Bulk_3V3' R1501-2 R1502-2 NET 'Hub_I2C_to_FPGA_SCL' U1502-3 R1511-1 NET 'Hub_I2C_to_FPGA_SDA' U1502-10 R1512-1 NET 'Bulk_1V8' R1511-2 R1512-2 NET 'Hub_I2C_to_FPGA_SCL' U1-BE16 # IO_L23P_T3U_N8_I2C_SCLK_65 NET 'Hub_I2C_to_FPGA_SDA' U1-BF16 # IO_L23N_T3U_N9_I2C_SDA_65 NET 'Hub_I2C_to_FPGA_SCL' U1-BA29 # IO_L18P_T2U_N10_AD2P_67 NET 'Hub_I2C_to_FPGA_SDA' U1-BB29 # IO_L18N_T2U_N11_AD2N_67 NET 'Hub_I2C_to_ROD_SCL' U1503-3 Meg_S1-B26 NET 'Hub_I2C_to_ROD_SDA' U1503-10 Meg_S1-C26 # # Finally connect the ByPass Capacitors for # the 1V8 supply to the Pull-Up Resistors for # the U1502 Buffer/Translator for the I2C Bus # that runs to the Hub FPGA itself, i.e. to # this FPGA's SysMon I2C port and to this # FPGA's I2C Master port. # NET 'Bulk_1V8' C1513-1 C1514-1 NET 'GROUND' C1513-2 C1514-2 # # No Connect pins on the Buffer/Translator chips # NET 'No_Conn_U1501_Fault' U1501-8 NET 'No_Conn_U1502_Fault' U1502-8 NET 'No_Conn_U1503_Fault' U1503-8