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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 | + | 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 |
- | The reset input header is connected to pin C31 for KONTRON | + | The reset input header is connected to pin C31 for Kontron |
- | 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 |
- | 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 ===== | ||
+ | |||
+ | {{: | ||
===== 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' | |C1, C2, C6, C7|Capacitor with 0.2" lead spacing, under 10mm diameter, under 12mm height (Builder' | ||
|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" | 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" | ||
- | 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 " | + | 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 " |
===== Photographs ===== | ===== Photographs ===== | ||
- | {{: | + | [[https:// |
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+ | Curt Mayer (curt@zen-room.org) has published a 3d printable card cage for this motherboard. | ||
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+ | it can be downloaded from https:// | ||
- | \\ | + | {{https:// |