R4d CORE Module

Click here for documentation for past revisions

Live Board Map:
Move your mouse around over the image below to see info on the parts.

Parts List:
MBHP CORE_R4 Orderlist
| Loc.  | Description                        	| Qty   | Mouser Part #      |
| IC1   | IC-Socket for PIC                  	|     1 | 571-1-390262-5     |
| IC2   | Optocoupler 6N138                  	|     1 | 782-6N138          |
| IC2   | IC-Socket for 6N138                	|     1 | 571-1-390261-2     |
| IC3   | Voltage Regulator 7805             	|     1 | 512-LM7805CT       |
| T1    | Transistor BC337                   	|     1 | 512-BC337          |
| D1    | Diode 1N4148                       	|     1 | 512-1N4148         |
| Dx    | Diode 1N4148 (CAN bus termination)    |     1 | 512-1N4148         |
| Q1    | 10mhz 49S Crystal                  	|     1 | 73-XT49S1000-20    |
| BR1   | Bridge Rectifier                   	|     1 | 625-W08G           |
| P1,2  | TrimPot 10 kΩ                       	|     2 | 531-PT6KV-10K      |
| R1    | Resistor 100 Ω                   	|     1 | 291-100            |
| R5    | Resistor 5.6 kΩ                  	|     1 | 291-5.6K           |
| R6    | Resistor 1.2 kΩ                  	|     1 | 291-1.2K           |
|R2,4,12| Resistor 1 kΩ                    	|     3 | 291-1K             |
| Rx	| Resistor 1 kΩ  (CAN bus termination)  |     1 | 291-1K             |
|R3,9-10| Resistor 10 kΩ                   	|     3 | 291-10K            |
|R7,8,11| Resistor 220 Ω                   	|     3 | 291-220            |
| C1,2  | Ceramic Cap 33pF (2.54LS) "33"        |     2 | 140-50N2-330J      |
|C3,7,8 | Ceramic Cap 100nF=.1µF "104"       	|     3 | 80-C412C104K5R     |
| C4    | Electrolytic Cap 10µF (5DIA-2LS)    	|     1 | 140-HTRL25V10-RC   |
| C5    | Electrolytic Cap 2200µF (13DIA-5LS)  	|     1 | 140-HTRL16V2200-RC |
| C6    | Ceramic Cap 330nF=.33µF (2.54LS) "334"|     1 | 80-C320C334M5U     |
| Jxx   | 1-row SIL Headers (5 pins)        	|     1 | 517-6111TG         |
| Jxx   | 2-row DIL Headers (86 pins)        	|     2 | 517-6221TG         |
|J12,13 | 5 PIN DIN Jack PCB mount              |     2 | 161-0505           |
1.  The required PIC chip (IC1) is not included in this list, they are available
    blank or pre-programmed from mbhp.avishowtech.com or blank from other sources.
2.  The above pinheader counts are for recommended configuration, other loadings
    will change this count.  See the live board map above for the recommended
    connector placement.

PCBs and Kits are available: Click to order.

PCB Quick View:

# Location Detail Description                              
J1 Connection to the power supply. Either the output of a 7V-10V transformer, or a wall adapter can be used. 500 mA is recommented, especially if a backlit display is used, but MIDIfilter and MIDImerger work also with ca. 100 mA. AC or DC doesn't matter, since the rectifier behind J1 converts to DC anyhow. Also the polarity has not to be taken into account.
J2 +5V output, can be used to supply other core modules in a multiprocessor environment, so that you only have to mount the parts for the power supply (BR1, IC3, C5, C6) on one core module. Restriction: the 7805 gets very hot when it delivers currents above 500 mA, so only core modules without backlit display like MIDIO128, MIDImerger, MIDIfilter should be supplied over this port.
J4 Interface to the BankStick, to MBHP_IIC_* modules like MBHP_IIC_MIDI, and to the second MIDI IN port for MIDImerger.
J5, J5A J5B This is an either-or setup. J5 matches the old (SIL) AIN connection. J5A and J5B match the with newer AIN boards (AIN_R3 up). Obviously with newer AIN boards leave out the SIL pinheader out and load J5A/B, if using older boards leave out J5A/B and load J5. Interface to the AIN module for MIDIbox64 and MIDIbox64E. There are also some application which use this as digital in- or output.
J6/J7 J6:Interface to the AIN module for MIDIbox64 and MIDIbox64E.
J7:Interface to the MF module, sometimes also used for the MBHP_AOUT or MBHP_AOUT_LC module.
J8/J9 Pay attention to this one, it has moved since last rev....
J8:Interface to the DOUT module chain.
J9:Interface to the DIN module chain.
J10 Pay attention to this one, it has moved since last rev....Do not mistake it for J8/J9 since they were in this position on the last rev!
J10:Interface to application specific module extensions like the SID module.
J11 MIDI digital IO port, interface to the LED/Thru/COM module. Can also be used to cascade multiple core modules in a long MIDI chain. Note: Don't plug the optocoupler (IC2, 6N138) into the socket when using the J11:MI (MIDI-IN) pin as an input, otherwise the Rx input will get the data from two different sources, which is not provided by the MIDI protocol (point-to-point). A MIDImerger is necessary to combine multiple MIDI IN sources. In other words: when using the COM module or when connecting the J11:MO of one core module to J11:MI of another core module, or when connecting the core module directly with the Gameport, the optocoupler of the other module should not be plugged into the socket to avoid a corrupted MIDI data stream.
J12 MIDI OUT port.
This is an either-or position, load SIL 3 pin header for wiring to panel mount MIDI jacks, otherwise install a PCB mount MIDI socket in/over the J12 pads.
J13 MIDI IN port.
This is an either-or position, load SIL 3 pin header for wiring to panel mount MIDI jacks, otherwise install a PCB mount MIDI socket in/over the J12 pads.
J14 Used by MIOS as touch sensor strobe line. Sometimes also used for debugging purposes.
J15 Interface to LCD display module.
GND LIFT Can be used to temorarily disconnect the CORE's ground from the ground on J12:Pin2. Leave this alone for normal operation!

Resistor Placement:

Changes from R4c PCB:
Added resistor R12 to keep up with current official schematic.

2.26.10: Parts list changes - Added 1 1kΩ resistor and 1 1N4148 diode for CAN bus termination. (Prevents random resets with SID app)

For complete technical info and instructions see www.midibox.org