Paddle and Pass-Through Cards --------------------------------- Original Rev. 6-MAR-1996 Latest Rev. 3-APR-1997 Paddle and Pass-Through boards are used in the Run II Frameworks to simplify the cabling between the various components in the Frameworks. All signal cabling will be accomplished with 34 conductor twist and flat cables. 34 conductor cables are used because they are much more flexible than the 64 conductor material and because it is easy to correctly install insulation displacement connectors on 34 conductor cable. These cables can carry 17 differential signals although often they will be used to carry only 16 differential signals in the Run II Frameworks. When carrying only 16 signals then the last pair, conductors #33 and #34 are not used. All cabling in the Run II frameworks will use 34 conductor cabling installed in the normal way. That is, the pin #1 end of the insulation displacement female connector is installed at the brown/tan side of the cable. All of the cable mount female connectors plug into the male headers on the Paddle and Pass-Through boards in the normal key aligned way. All Paddle and Pass-Through boards have been designed so that the pin #1 edge of the twist and flat cables is always up. All twist and flat cables carry differential signals in the normal way; that is the odd pins (colored wires) are the non-inverted half of the signal and the even pins (tan wires) are the inverted half of the signal. The pin #1 edge of a flat cable always carries the lesser significant bits of a multi bit signal and the pin #34 edge of a cable always carries the more significant bits of a multi bit signal. In order to have all of the 34 conductor cables carrying signals in the standard order a certain amount of mapping must take place on the Paddle and Pass-Through boards. Understanding this mapping is slightly complicated by the fact that different versions of different connectors will use different numbering schemes, and connectors will carry the same signal on different pins depending on their location. Two rules are used to keep all of this straight so that we acheive the goal of all flat cables carrying the signals in a standard order. These rules are: 1. For all P2-P3 backplane connectors, the signal carried by a given connector pin is the same, independent of whether the backplane slot contains a THE Card, or a Pass-Through Board. The arrangement of signal name vs P2-P3 backplane connector pin number is: MAS_In_000 : MASS_In_031 carried on P2 rows A,B pins 1:32 MAS_In_032 : MASS_In_063 carried on P2 rows D,E pins 1:32 MAS_In_064 : MASS_In_095 carried on P3 rows A,B pins 1:32 MAS_In_096 : MASS_In_127 carried on P3 rows D,E pins 1:32 In all cases the non-inverted signal of a differential pair is received by a pin in rows B or E and the inverted half of the signal is received by a pin in row A or D. The pin numbers as used in the above table and this paragraph are those from the ERNI backplane connector and the ERNI right angle receptacle as used on THE Card. 2. In all technical descriptions of a board (Paddle boards, THE Card, Pass-Through board) the layout of signal name vs connector pin will be in terms of the actual connector and its orientation as used on that particular board. Front Paddle Board ------------------ The purpose of the Front Paddle Board is to map the Main Array Output signals from THE Card onto four 34 pin headers. The Main Array Output Signals exit THE Card using a 160 pin 90 degree female reverse style DIN connector. This is the same connector as is used on THE Card for connection to P1, P2, and P3. To plug into THE Card's 160 pin female reverse style DIN connector the Front Paddle Board uses a 160 pin 90 degree solder tail male standard style DIN connector. The numbering on the standard style DIN connector runs opposite to that on a reverse style DIN connector (the rows on both styles are alpha labeled the same) so even though the Main Array front panel output connector has pin number 32 at the top, the standard style DIN connector on the Front Paddle Board will have pin number 1 at the top. However, the same Mentor "geometry" is going to be used to place the standard male DIN connector on the Front Paddle Board as was used to place the reverse style DIN connectors on THE Card. Thus the actual pin numbering in the net list for the Front Paddle board contains the product of a number of translations. To isolate this source of potential confusion, this document, the official description of the Front Paddle board, will not talk about the pinout of the 5 row DIN connector on the Front Paddle board. The Front Paddle Board is officially described only in terms of which Main Array Output Signal appears on which pin on the four 34 pin headers for the twist and flat cables. +------------------------- | TOP \ | +----+-- +----+-- \ | |O | |O | -----+ | | J1 | | J3 | | | | | | | +----+-+ | | 0: | |32: | | | | | | 15| | 47| | | | | +----+-- +----+-- | | | | | J5 | | | +----+- +--- +-- | | | | |O | |O | | | | | | J2 | | J4 | | | | | | | | | +----+-+ | |16: | |48: | | | | 31| | 63| -----+ | +----+-- +----+-- / | / +------------------------- Note that the four 34 pin connectors are mounted with their latches facing forwards towards the 5 row DIN connector, i.e. the 34 conductor twist and flat cables will enter these connectors from this side. The following table is the map of Main Array Output Signals to the various pins on the four 34 pin headers for the twist and flat cables. Front Paddle Main Array Board Output 34 Pin Header Signal Name Pin Number --------------- ------------- MAS_Out_00_Non \ / J1 pin 1 MAS_Out_OO_Inv \ / J1 pin 2 .... ---- ... MAS_Out_15_Non / \ J1 pin 31 MAS_Out_15_Inv / \ J1 pin 32 MAS_Out_16_Non \ / J2 pin 1 MAS_Out_16_Inv \ / J2 pin 2 .... ---- ... MAS_Out_31_Non / \ J2 pin 31 MAS_Out_31_Inv / \ J2 pin 32 MAS_Out_32_Non \ / J3 pin 1 MAS_Out_32_Inv \ / J3 pin 2 .... ---- ... MAS_Out_47_Non / \ J3 pin 31 MAS_Out_47_Inv / \ J3 pin 32 MAS_Out_48_Non \ / J4 pin 1 MAS_Out_48_Inv \ / J4 pin 2 .... ---- ... MAS_Out_63_Non / \ J4 pin 31 MAS_Out_63_Inv / \ J4 pin 32 The Front Paddle Board uses a ground plane to separate the signal traces for J1 and J2 from the traces for J3 and J4. This ground plane is connected to the ground pins in the center row of the 5 row DIN connector. The intend is to have the transmission line characteristics of this paddle board appear just like 110 Ohm twist and flat cable. The Front Paddle Boards provide bridging vias so that pins #33 and #34 on all four of the 34 pin headers may optionally be tied to the ground plane. Rear Paddle Board ----------------- The purpose of the Rear Paddle Board is to map THE Card's Main Array Signal Inputs to connectors that are appropriate for twisted flat cable. The Rear Paddle Board plugs into either P2 or P3 from the rear of the back plane and maps rows A, B, D, and E of the backplane connector into 4 twisted flat cable connectors of 34 pins each. The Rear Paddle Board is also used on backplane slots containing a Pass-Through Board. This allows cabling of a Pass-Through Board to the inputs of a THE Card with standard 34 conductor twist and flat cables. The following is an outline of the Rear Paddle Board as seen looking at its "component" side. ---------------------------+ / TOP | / +----+-- +----+-- | +----- |O | |O | | | | J4 | | J2 | | +-+----+ | | | | | | | | |32: | | 0: | | | | | | 47| | 15| | | | J1 | +----+-- +----+-- | | | | | | | | +--- +-- +----+- | | | | |O | |O | | | | O | | J5 | | J3 | | All connectors +-+----+ | | | | | are mounted on | |48: | |16: | | the Component +----- | 63| | 31| | side of the Rear \ +----+-- +----+-- | Paddle Board. \ | ---------------------------+ J1 34 Pin Header Signal Name Pin Number Pin Number ----------- ------------ ------------- MAS_00_Non row B pin 32 J2 pin 1 MAS_OO_Inv row A pin 32 J2 pin 2 .... ..... ... MAS_15_Non row B pin 17 J2 pin 31 MAS_15_Inv row A pin 17 J2 pin 32 MAS_16_Non row B pin 16 J3 pin 1 MAS_16_Inv row A pin 16 J3 pin 2 .... ..... ... MAS_31_Non row B pin 1 J3 pin 31 MAS_31_Inv row A pin 1 J3 pin 32 MAS_32_Non row E pin 32 J4 pin 1 MAS_32_Inv row D pin 32 J4 pin 2 .... ..... ... MAS_47_Non row E pin 17 J4 pin 31 MAS_47_Inv row D pin 17 J4 pin 32 MAS_48_Non row E pin 16 J5 pin 1 MAS_48_Inv row D pin 16 J5 pin 2 .... ..... ... MAS_63_Non row E pin 1 J5 pin 31 MAS_63_Inv row D pin 1 J5 pin 32 The same Rear Paddle Board is used for both P2 (i.e. MAS_00 : MAS_63) and for P3 (i.e. MAS_64 : MAS_127). Additional Rear Paddle Ideas: We could make the Rear Paddle Cards so that you can "stack" them to distribute a set of signals along the P2-P3 backplane. It looks like one can just use ERNI 414310 connectors instead of the normal 34 pin headers to make them stackable. Some of the Rear Paddle Cards will want to have Terminator Resistors and some must not have them. Could has a big value of terminator on Rear Paddle Card in a set of stacked cards. Could flip the connectors to the other side of the Rear Paddle card to even up the ERNI Pin Length going through the backplane: --------------+----+ --- +----+----------------- THE Card | | --- | | Read Paddle +----+ --- +----+ vs --------------+----+ --- +----+ "Equal ERNI THE Card | | --- | | Read Paddle pin length" +----+ --- +----+----------------- Rear Paddle Card Rev. A Problem(s) In the net list for the Rev. A Rear Paddle Cards the pin numbers for the center row of pins (row C) was not properly flipped over to take into consideration that on the Rear Paddle Card ERNI pin C32 is at the top. This is only a problem on the center power/ground row where the straight definition of the 5 Row P2-P3 was used. This lack of flipping center row pin numbers causes come SHORT CIRCUIT problems if one of these Rev A Rear Paddles is used on either the Slot #1 or Slot #21 P2-P3 backplane positions which do have the center row pins installed The table below shows where the SHORT CIRCUITS will occur with the Rev. A Rear Paddle Cards. All "*" indicate a power supply pin. Official 5 Row P2-P3 Definition turned up side down Official 5 Row (i.e. as was done on P2-P3 Definition Rev. A Rear Paddle (i.e. What is on because the net list the P2-P3 backplane) was not flipped) P2-P3 Row C P2-P3 Row C -------------- -------------- C1 Gnd C32 Gnd C2 * C31 * C3 Gnd C30 Gnd C4 * C29 * C5 * C28 * C6 Gnd C27 Gnd C7 * C26 * C8 Gnd C25 Gnd C9 * C24 * C10 Gnd C23 Gnd C11 * C22 * C12 Gnd C21 Gnd C13 * C20 * C14 Gnd C19 * ---> C15 * C18 Gnd C16 Gnd C17 * ---> C17 * C16 Gnd C18 Gnd C15 * ---> C19 * C14 Gnd C20 * C13 * C21 Gnd C12 Gnd C22 * C11 * C23 Gnd C10 Gnd C24 * C9 * C25 Gnd C8 Gnd C26 * C7 * C27 Gnd C6 Gnd C28 * C5 * C29 * C4 * C30 Gnd C3 Gnd C31 * C2 * C32 Gnd C1 Gnd Thus, counting from the bottom up, ERNI pin numbers 15, 17, and 19 are in conflict, i.e. that tie a backplane power supply pin to the Rev. A Rear Paddle Card ground plane. So we will try to pull these three Row C pins from all the TE160 connectors use to assemble the Rear Paddle Cards. OTHER Problem on Rev. A Rear Paddle (and also on Front Paddle and Pass-Through). Once the cables are plugged in the Silk Screen that tells you the MSA_IN or MSA_OUT signal number is covered up !! OTHER Problem on Rev. A Rear Paddle (and also on Front Paddle). Ansley 34 pin cable mount connectors were used when determining the physical layout of the Rev. A Front and Rear Paddle Cards. The 3M cable mount connectors are thicker and will NOT fit. Pass-Through Board ------------------ The Pass_Through Board is used to route signals from the front of the crate to the rear of the crate. This board presents signals on the backplane pins of the slot tht it is plugged into with the same arrangement of signal name vs backplane pin number as THE Card uses. The Pass-Through Board is a full size 9U x 400mm board. It has a normal 9U front panel. The front panel has slots to allow up to eight 34 conductor cables to pass through the front panel. Immediately behind the front panel are clamps which are used to hold these 34 conductor cables in place. These 34 conductor cables run most of the length of the Pass-Through board and plug into 34 pin headers near the P2 and P3 rear connectors. The twist and flat cable is used to run the signals for most of the length of the Pass-Through board because ti make a better transmission medium than circuit board traces. The 34 pin headers near the rear P2 and P3 connectors appear to be facing in the wrong direction. They are arranged in this apparently strange way in order to have their pin #1 in the proper orientation with respect to the rear P2 and P3 connectors. All connectors are mounted on the component side of the Pass-Through board. The Pass-Through board must be able to fit into a VME slot of the normal width. The 34 conductor cables that run most of the length of the Pass-Through board will block some the vertical air flow past the component side of the board but this is good as it forces the cooling air to flow past the electronics board that generate heat. Because the rear section of the Pass-Through board will need to be a multi layer board and the large front section is just a mechanical support; it may be that the board is constructed in two parts. If possible the rear P1 connector will be installed, but just the plastic shell of this connector. All of the metal contacts would be removed to eliminate any connection to the P1 bus, especially the P1 Timing Signals. The reason for installing the plastic shell of P1 is to provide the additional alignment and support that it affords. P1 P2 P3 +------------------+ +------------------+ +------------------+ +--+------------------+----+------------------+----+------------------+--+ | +------------------+ +------------------+ +------------------+ | | | O J1 | | O J2 | | O J3 | | | +------------------+ +------------------+ +------------------+ | | | | | | | | | | | | | | | | +--------+ +--------+ +--------+ +--------+ | | T |O J4 | |O J5 | |O J8 | |O J9 | | | O +--------+ +--------+ +--------+ +--------+ | | P 0:15 16:31 64:79 80:95 | | | | | | | | | | | | | | | | +--------+ +--------+ +--------+ +--------+ | | |O J6 | |O J7 | |O J10 | |O J11 | | | +--------+ +--------+ +--------+ +--------+ | | 32:47 48:63 96:111 112:127 | | | ============================================================================ Front All connectors are mounted on the Component side of the Pass-Through Board. The eight 34 pin headers are mounted with their ejection latches facing the backplane in order to have their pin number one be in the proper orientation. J2 34 Pin Header Signal Name Pin Number Pin Number ----------- ------------ ------------- MAS_00_Non row B pin 1 J4 pin 1 MAS_OO_Inv row A pin 1 J4 pin 2 .... ..... ... MAS_15_Non row B pin 16 J4 pin 31 MAS_15_Inv row A pin 16 J4 pin 32 MAS_16_Non row B pin 17 J5 pin 1 MAS_16_Inv row A pin 17 J5 pin 2 .... ..... ... MAS_31_Non row B pin 32 J5 pin 31 MAS_31_Inv row A pin 32 J5 pin 32 MAS_32_Non row E pin 1 J6 pin 1 MAS_32_Inv row D pin 1 J6 pin 2 .... ..... ... MAS_47_Non row E pin 16 J6 pin 31 MAS_47_Inv row D pin 16 J6 pin 32 MAS_48_Non row E pin 17 J7 pin 1 MAS_48_Inv row D pin 17 J7 pin 2 .... ..... ... MAS_63_Non row E pin 32 J7 pin 31 MAS_63_Inv row D pin 32 J7 pin 32 J3 34 Pin Header Signal Name Pin Number Pin Number ----------- ------------ ------------- MAS_64_Non row B pin 1 J8 pin 1 MAS_64_Inv row A pin 1 J8 pin 2 .... ..... ... MAS_79_Non row B pin 16 J8 pin 31 MAS_79_Inv row A pin 16 J8 pin 32 MAS_80_Non row B pin 17 J9 pin 1 MAS_80_Inv row A pin 17 J9 pin 2 .... ..... ... MAS_95_Non row B pin 32 J9 pin 31 MAS_95_Inv row A pin 32 J9 pin 32 MAS_96_Non row E pin 1 J10 pin 1 MAS_96_Inv row D pin 1 J10 pin 2 .... ..... ... MAS_111_Non row E pin 16 J10 pin 31 MAS_111_Inv row D pin 16 J10 pin 32 MAS_112_Non row E pin 17 J11 pin 1 MAS_112_Inv row D pin 17 J11 pin 2 .... ..... ... MAS_127_Non row E pin 32 J11 pin 31 MAS_127_Inv row D pin 32 J11 pin 32 How Evenly Are the Different Species of Signals Handled As They Journey Through These Three Cards ------------------------------------------------------- Using the Feb-1995 as built information one wants to look at a couple of different things: 1. Which signals travel next to the GND plane and which signals are one layer away from the GND plane. 2. Which signals take the short path through the ERNI connectors (i.e. the "A" column of connector pins) and which signals take the long path (i.e. the "E" column) through these connectors. 3. Which signals spend lots of time in trace on the pcb's and which signals spend only a little time in trace. Signal PCB Trace ERNI Component Species Length PCB Layers Column --------- ------- --------- ----------------- ------ Front_PB 15:0 \/ Long \/ Non-Inv NT Solder - D 31:16 /\ Long /\ Inv is Solder - E Front_PB 47:32 \/ Short \/ Non-Inv is Comp - A 63:48 /\ Short /\ Inv NT Comp - B Rear_PB 15:0 \/ Long \/ Non-Inv NT Solder - B 31:16 /\ Long /\ Inv is Solder - A Rear_PB 47:32 \/ Short \/ Non-Inv is Comp - E 63:48 /\ Short /\ Inv NT Comp - D Pass_Thru 15:0 \/ Short \/ Non-Inv is Comp - B 31:16 /\ Short /\ Inv NT Comp - A Pass-Thru 47:32 \/ Long \/ Non-Inv NT Solder - E 63:48 /\ Long /\ Inv is Solder - D How Many of each type of Card to Build and their Expected Cost -------------------------------------------------------------- Card Quantity Cost of Cost of other Assembly Total Type to Build Raw PCB Components Cost Cost -------- -------- ------- ------------- -------- ----- Front_PB 160 est $25 Pass_Thr 15 Rear_PB 320 est $25 ------- Totals $12,000 Common Parts Used on all 3 Boards --------------------------------- 34 pin male header right angle, 4 sided, solder tail pcb mount, with center and military polarization, with ejection latches, gold on mating surface AMP Part Number: 499786-8 160 pin male header extended DIN, right angle, solder tail, used only on the Front Panel Paddle Board ERNI product: STV-E 160-M-abcde ERNI Part Number: 004-778 160 pin female header reversed style extended DIN, right angle, solder tail, (also used on THE Card for P1, P2, P3, and front panel Main Array Output Signals) ERNI product: STV-TE 160-F-abcde ERNI Part Number: 013-167