Digilent Vmod Breadboard Reference Manual Revision: December 15, 2010 1300 NE Henley Court, Suite 3 Pullman, WA 99163 (509) 334 6306 Voice | (509) 334 6300 Fax Overview The Digilent Vmod Breadboard (VmodBB) offers a ready-made solution for prototyping breadboarded or wire-wrapped circuits as accessories to Digilent system boards. The VmodBB provides connectors suitable for direct connection of various Digilent system boards. The VmodBB is available in a wire-wrap version or a solderless breadboard version. Features include: • • • • • VHDCI connector for connection to Digilent System boards Two 32 pin breadboards with 16 pins each, connected directly to signals from the system board Two power and one ground bus around Prototype connections on every signal Ships with two 300 tie point breadboards separated by a 100 tie point bus strip. Figure 1 Digilent Vmod Breadboard The usual Digilent convention is to power the VCC bus at 3.3V and the VU bus at 5.0V. However depending on the system board connected, other voltages may be present. Functional Description 68 Pin, VHDCI Connector The Digilent Vmod Breadboard (VmodBB) is used to connect a breadboard to the VHDCI connector and implement up to 28 IO signals to or from Digilent system boards. VHDCI connector J1 is provided on one side of the board for connection to Digilent system boards like the Genesys that contain a VHDCI style connector. The Digilent VHDCI connector signal convention provides for 40 generalpurpose I/O signals. Power Connection The VmodBB provides two power busses and a ground bus. The two power busses are labeled VU and VCC and are powered through the VHDCI connector. These two busses are made available at each connector position on the board. There is also a ground plane that connects the ground pins from all connectors together. Doc: 502-184 28 of the 40 general-purpose I/O signals from the VHDCI connector are brought out to connectors BB1 and BB2. These signals are labeled IO1-IO28. See Table 1 and Table 2 for a description of the relationship between VHDCI connector pins and signal names on BB1 and BB2. page 1 of 3 Copyright Digilent, Inc. All rights reserved. Other product and company names mentioned may be trademarks of their respective owners. VmodBB Reference Manual Digilent, Inc. Table 1: VHDCI Signals and Connector Pinout J1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 S1 IO1 GND IO2 IO3 GND IO4 IO5 GND IO6 IO7 GND IO8 IO9 GND IO10 VCC VU VU VCC IO11 GND IO12 IO13 GND IO14 IO29GND IO30IO31GND IO32IO33GND IO34SHIELD 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 S2 IO15 GND IO16 IO17 GND IO18 IO19 GND IO20 IO21 GND IO22 IO23 GND IO24 VCC VU VU VCC IO25 GND IO26 IO27 GND IO28 IO35GND IO36IO37GND IO38IO39GND IO40SHIELD Note: Signal names appended with ‘-‘ are not used Rev: December 10, 2010 www.digilentinc.com Page 2 of 3 VmodBB Reference Manual Digilent, Inc. Table 2: BB1 and BB2 Signals BB1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VCC GND IO1 IO2 IO3 IO4 IO5 IO6 IO7 IO8 IO9 IO10 IO11 IO12 IO13 IO14 Rev: December 10, 2010 BB2 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 VU GND IO15 IO16 IO17 IO18 IO19 IO20 IO21 IO22 IO23 IO24 IO25 IO26 IO27 IO28 www.digilentinc.com Page 3 of 3