As previously mentioned, another option for serial port loopback is SSI to SPI. This is available on the SSI3 and SPIA. In this option, the SPIA can either act as the slave or the master.
DigiKey customers in the United States can select from a range of delivery options, including Ground shipping at $6.99 and 2-Day at $12.99
Credit account for qualified institutions and businesses.
Payment in Advance by Wire Transfer
![]()
![]()
![]()
![]()
![]()


More Products From Fully Authorized Partners
Average Time to Ship 1-3 Days. Please see product page, cart, and checkout for actual ship speed.
Extra Ship Charges May Apply
For more information visit Help & Support
As previously mentioned, another option for serial port loopback is SSI to SPI. This is available on the SSI3 and SPIA. In this option, the SPIA can either act as the slave or the master.
Thank you!
Keep an eye on your inbox for news and updates from DigiKey!
Please enter an email address
Please accept the checkbox