S50 Hardware User Guide
1VV0301505 Rev. 3
Page 30 of 60
2021-05-05
Not Subject to NDA
Signal
Handling
TESTMODE#
Leave open
(1)
unused GPIOs
Leave open
SWDIO, SWCLK
Leave open. Only needed for debug purposes
(1)
Signals must be accessible for regulatory approving
(2)
It is strongly recommended to use hardware flow control in both directions. Not using flow control can cause loss of data.
Table 9: Handling of Unused Signals