Lime Zipper card spec(s)

Description

These specs would benefit from having documentation somewhere specifying what modifications are necessary for the default-from-the-manufacturer zipper board - namely, the shorting of R24, R54, R55, R56, and R57, and open circuiting of R60, R61, R62, R63, and R64 in order to open up the SPI bus to the HSMC/FMC connectors (and remove the from the microcontroller)

Environment

None

Activity

Show:
Davis Hoover
February 16, 2016, 6:21 PM

In addition, it should be noted that R74 should never be shorted. if you do this bad thing (which you might consider doing, along with removing R76, in an attempt to allow for HSMC control of the I2C SDA pin on the SI5351), SDA will be pulled high by pin 111 on the HSMC host, which is BAD for the SDA pin (open-drain) of any I2C bus.

James Kulp
April 12, 2017, 11:31 AM

This should be in the installation doc.

Assignee

Unassigned

Reporter

Davis Hoover

Labels

None

Components

Priority

Minor
Configure