CB-Fan Build Time Defaults ----------------------------- Rev. 6-May-2012 The CB-Fan card includes a large number of options that may or may not be selected. This file list which options will be enabled during the production assembly of the CB-Fan cards. 1. Send Almost_Full_2 or SBC_n_Busy to the Control H-Clk Card ? - The CB-Fan cards will be assembled to send the SBC_n_Busy signals to the Control H-Clk card. - Enable sending the SBC_n_Busy signals to Control H-Clk. Install a zero Ohm jumper in: R122, R124 Do NOT install: R121, R123 - Disable sending the Almost_Full_2 signals to Control H-Clk. Do NOT install: R101, R102, R103, R104, R105, R106 R107, R108, R109, R110, R111, R112 R113, R114, R115, R116 2. Use J6 pair 4 (Load_Next_Event) or J6 pair 5 (separate SBCs_READ_NOW) as the source of the Read_Now signal that will be sent to the SBCs ? - Use the J6 pair 4, i.e. the Load_Next_Event signal, as the source of the Read_Now signal that is sent to 8 SBCs. - Install a zero Ohm jumper in: R126 - Do NOT install: R125 3. On J7, send back to the Control H-Clk card either the Almost_Full_1_2 signals from the special Control Bus for the scaler system or send back the General_Purpose_Input signals number 1 and 2 ? - Send back the General_Purpose_Input signals 1 and 2. - See item #5 below. 4. On the special Control Bus, Control Bus #9 for the Scaler System, either send the normal CRST and CLR signals to the Scaler System or lock these signals LOW to the Scaler System ? - Lock LOW the CRST and CLR signals on the special Control Bus to the Scaler System. - Install a zero Ohm jumper in: R133, R135 - Do NOT install: R132, R134 5. J7 may return 4 General_Purpose_Input signals to the Control H-Clk card. These 4 General Purpose Input signals may be received on the CB-Fan card as either Differential ECL LVDS signals received on connector J12 or they may be received as single ended 3.3V signals on connector J13. - Enable the CB-Fan card to receive the 4 General Purpose input signals as Differential ECL / LVDS signals on the J12 connector. - Install a zero Ohm jumper in: R136, R138 - Do NOT install: R137, R139 6. Setup the J9 J10 Generic 16 bit Diff_ECL <--> LVDS Converter for either Diff_ECL --> LVDS or set it up for LVDS --> Diff_ECL ? - Set it up for Diff_ECL input converted to LVDS output. - Install a jumper cap between J231 pins 1 and 2. - J231 pin 3 is open floating. - Install 6 pin resistor packs that contain 3 isolated 110 Ohm resistors in the sockets at: R221, R222, R223, R224, R225, R226, R227, R228. - The 6 pin resistor packs that contain 3 isolated 110 Ohm resistors are part number: ?? ?? 7. There are a number of additional jumpers, vias, and other features on the CB-Fan card that may be useful in certain applications of this card. They are: - R131 This jumper runs between Vdd and the Output Enable pin, pin #5, of the DS90LV110T control signal fan out chips. The output enable pin of the DS90LV110Ts must be voltage Hi for its outputs to be enabled - thus jumper R231 is normally installed. - R231 This jumper runs between Vdd and the Master Enable pin, pin #10, of the DS91M040 LVDS transceiver chips. The master enable pin of the DS91M040 must be voltage Hi for these chips to power up and operate - thus jumper R231 is normally installed. - R232 This jumper runs between Gnd and the FSEN 1 & 2 pins, pin #9 & #32, of the DS91M040 LVDS transceiver chips. The FSEN 1 & 2 pins control whether the LVDS receivers have a conventional type 1 symmetric input threshold or a 50 mV offset type 2 failsafe input threshold. With the FSEN 1 & 2 pins held voltage Low the LVDS input have. conventional symmetric thresholds. Jumper R232 is normally installed. - R233 This jumper runs between Gnd and the Latch Enable pin, pin #21, of the 100398 Differential ECL transceiver chips. When the Latch 100398 Enable pin is held voltage Low the the latches in this chip are transparent. Thus jumper R233 is normally installed. - R234 This jumper runs between Vcc and the Output Enable pin, pin #9, of the 100398 Differential ECL transceiver chips. This Output Enable pin must be pulled voltage Hi for the 100398 outputs to be enabled in either direction. Thus jumper R234 is normally installed. - The TRIG and CLK fan out chips, DS90LV110T chips U2 and U4, have vias on their unused outputs to make it easy to access these signals in the future if that is necessary. - The Output Enable pin, pin #16, on all of the 100324 Differential ECL driver chips for the Control Buses do not have a jumper or via on them - rather they were all routed through a loop that is external to the chip's foot-print. Thus if one needs to access these Output Enable pins it is straight forward to do so. As built these pins are held voltage Hi to enable the outputs from these chips. These are chips: U27, U28, U37, U38, U43. - The unused section of U55, a 65LVDT34D LVDS receiver chip has vias on its input and output pins just in case access to them is necessary in the future. - The unused sections of U51, a 74LVC541 Octal Buffer chip, has its inputs pulled Low. Access to the input and output of this SO-20 package chip has been made possible just in case it is needed in the future. - The 8 SBC_n_Busy inputs and the 4 General Purpose Inputs may or may not be used or perhaps only a subset of them will be used on a given card. All of these inputs have been equipped with 50k Ohm pull down resistors so these CMOS inputs are safe whether or not they are driven by a signal. - Four extra mounting holes for M2.5 screws have been provided on the CB-Fan card. As built nothing will be installed in these holes. They are located at: 137.2, 16.0 137.2, 46.0 135.0, 178.0 135.0, 217.0 - Eight extra ground access vias have been provided at locations distributed around the CB-Fan card. These are 1.1mm land 0.7mm hole diameter vias with thermo relief that are tied to both ground planes. They can be used for scope loop grounds or for future modifications to the CB-Fan card. - Connection to any of the power buses on the card: Vcc, Vdd, Vtt, Vee are provided at the multi via connected tantalum capacitor locations on the card. - U56 the 65LVDS391 quad LVDS driver chip for the 4 single ended General Purpose Input signals is setup so that either or both pairs of its outputs can be enabled. Thus if necessary one can mix and match single ended vs Diff_ECL LVDS General Purpose Inputs signal formats at the pair level. - There may be some advantage in grounding the unused Control Bus signal lines that carry the L2_Acpt and L2_Rej signals to the CAEN TDC cards. These 2 control signals are not used by the TDC cards. For all 9 copies of the Control Bus that are sent out from the CB-Fan card, ground vias have been provided near the connector pins for these unused signals so that these lines may easily be grounded if that seems appropriate in the future. - The non-isolated DC/DC converters to make the -2.0V and -4.5V Vtt and Vee power buses have been conservatively sized so that power is available for additional ECL receivers, drivers, or logic if that is necessary in the future.