XLF vs. XUF vs. XEF pinout configuration

[mon2]

For a cost reduction, considering to use the XLF series but only the datasheets of the XUF / XEF are posted at this time on the XMOS website. To replace the XUF with a XLF device, how should the missing USB function pins be strapped for proper operation ? On this design, there is no interest to use the USB nor Ethernet PHY. Respectively, welcome a review of the XLF datasheet (FB236 BGA package). If in a pinch on inventory, we wish to be able to switch between the use of either the XEF, XUF or XLF series with a common footprint (and external respective strappings) during production.

[Thomas]

Datasheets for the general purpose family of XL and XLF chips are now available on xmos.com.

http://www.xmos.com/products/silicon/xc ... /xl-series

They are not pin compatible with XU and XE chips.