UMC32+ DIY USB-MIDI User Manual
Firmware v3.1.0, Hardware v1.1, Datasheet: 03/20/2011 1:37 PM / © 2008-20011 Hale Microsystems LLC, http://www.halemicro.com
4
Linking of two UMC’s for 64 IO’s (CN6)
You have the ability to link up to 2 (two) UMC32+s together using
the 5 pin aux port located at the far end of the board between
Bank2 (09-16) and Bank3 (17-24). The linking is achieved by
connecting the corresponding pins with jumpers or the “UMC
linker” board. Master / Slave operation is auto-detected making
the link hassle free. Please keep in mind that slaved units are not
accessible to the Configuration utility. Therefore each UMC must
be configured prior to being linked. The total current for both
devices must not exceed 500mA when utilizing USB bus power.
When using a UMC as a slave device the slave must have the
CN10 Jumper removed or the slave will not operate.
Setup for USB Power(CN10)
The factory default has CN10 fitted with a jumper to provide
power via the USB bus. This also provides a convenients means
for measuring the current consumption of your final build. The
only other cases where this jumper should be removed or off is
when a UMC is connected to a linker board and is being used as
a slave, or when external power is being used as a Master.
Aux Connector (An extra 8 inputs!)
This connector will provide a means for future expansion. It is
configured as a digital input with a 10mS debounce.
The input
Type is NOT configurable and is fixed as Note On/Off Channel 1,
Note # 1 thru 8 if Master, and Notes # 9 thru 16 if a linked slave.
The shift pin also works here.
If a jumper is placed across Pin1 and Pin3 of the Aux Connector
(“A” and Ground - see Pin Diagram on Page 11), the UMC will
configure it‟s 32 I/O‟s as Digital Inputs. This test mode is useful
tor trouble shooting and diagnosis. It is also important to note that
this test mode will not overwrite any of your configuration settings
as only the configuration utility will do that.
