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boards:ecb:backplane-3:start [2017/03/18 12:44]
will [Introduction]
boards:ecb:backplane-3:start [2022/11/02 11:20] (current)
zenxyzzy
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 The ECB Mini Backplane is a backplane card for the EuroCard Bus which allows up to 3 ECB cards to be connected at one time. The ECB Mini Backplane is a backplane card for the EuroCard Bus which allows up to 3 ECB cards to be connected at one time.
  
-The backplane features a power input, power switch, LED to indicate when power is on, and a 2-pin input header to connect a reset switch. On the reverse side of the PCB the ECB pin rows and columns are labelled for quick identification and a key listing the ECB signal names is provided.+The backplane features a power input, power switch, LED to indicate when power is on, and a 2-pin input header to connect a reset switch. On the back side of the PCB the ECB pin rows and columns are labeled for quick identificationand a key listing the ECB signal names is provided.
  
-The reset input header is connected to pin C31 for KONTRON compatible reset (this is recommended over the legacy "N8" style reset).+The reset input header is connected to pin C31 for Kontron compatible reset (which is recommended over the legacy "N8" style reset).
  
-The board is designed to be used either standing up or lying on its side with the backplane connectors and power switch above the ECB cards.+The board is designed to be used either flat on a table with the cards standing upor on its side with the backplane connectors and power switch above the ECB cards and both backplane and cards resting their edges on the table.
  
-The PCBs are manufactured using 2.0mm thick FR4 with ENIG finish.+The 2018 PCBs are manufactured using 1.6mm thick FR4 with lead solder HASL finish (the 2017 boards used 2.0mm thick FR4 with ENIG finish, however HASL is nicer to solder, 1.6mm is easily strong enough, and it reduces the cost significantly)
  
 +===== Schematic =====
 +
 +{{:boards:ecb:backplane-3:backplane.pdf|Schematic (PDF format)}}
  
 ===== Bill of Materials ===== ===== Bill of Materials =====
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 |C1, C2, C6, C7|Capacitor with 0.2" lead spacing, under 10mm diameter, under 12mm height (Builder's choice - typically at least 100uF)|Panasonic 6SEPC560MX (good diameter, lead spacing is a bit narrow but fits with some "encouragement", very low ESR) \\ Panasonic EEUFR1E331B (untested but looks to be a good choice)| |C1, C2, C6, C7|Capacitor with 0.2" lead spacing, under 10mm diameter, under 12mm height (Builder's choice - typically at least 100uF)|Panasonic 6SEPC560MX (good diameter, lead spacing is a bit narrow but fits with some "encouragement", very low ESR) \\ Panasonic EEUFR1E331B (untested but looks to be a good choice)|
 |R1|470 ohm 0.25W resistor|Multicomp MCF 0.25W 470R (Farnell order code 9339531)| |R1|470 ohm 0.25W resistor|Multicomp MCF 0.25W 470R (Farnell order code 9339531)|
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 ===== Notes on Construction ===== ===== Notes on Construction =====
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 If you will be using the Interrupt or DMA chains you will need to fit four wire jumpers connecting /BAO to /BAI and /IEO to /IEI as indicated on the PCB. The only Retrobrew Computers board to use these signals is the "Zilog Peripherals" board so these jumpers can generally be omitted. If you will be using the Interrupt or DMA chains you will need to fit four wire jumpers connecting /BAO to /BAI and /IEO to /IEI as indicated on the PCB. The only Retrobrew Computers board to use these signals is the "Zilog Peripherals" board so these jumpers can generally be omitted.
  
-If you intend to use the board lying flat with the cards standing up, fit four 3M BumpOn rubber domes on the rear to prevent scratching your work surfaces. If you intend to use the board vertically with the ECB cards lying against the desk be aware that many cards will be "upside-down", take care to ensure the electrons don't fall out. +If you intend to use the board lying flat with the cards standing up, fit four 3M BumpOn rubber domes on the rear to prevent scratching your work surfaces. If you intend to use the board vertically with the ECB cards lying against the desk be aware that many cards will be "upside-down", so please take care to ensure the electrons don't fall out.
  
 ===== Photographs ===== ===== Photographs =====
  
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 + 
 +Curt Mayer (curt@zen-room.org) has published a 3d printable card cage for this motherboard. 
 + 
 +it can be downloaded from https://github.com/cm68/ecb_cage_3
  
-\\+{{https://www.retrobrewcomputers.org/lib/plugins/ckgedit/fckeditor/userfiles/image/boards/ecb/backplane-3/ecb3-oblique.jpg?nolink&400x383}}
  
  
boards/ecb/backplane-3/start.1489855489.txt.gz · Last modified: 2017/03/18 12:44 by will
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