M13design M13-RA6M3-EK, User Manual, Page: 46 / 52

User Manual - Rev1.0.2 Multiplexed Functions
M13design - 16 Dec. 21 46/53
5.3 TDI / CTS2 / IRQ11
As mentioned in Section 3.9 J-Link OB the default debug protocol used on the board is SWD instead of
TJAG. This gives us an extra GPIO P110 (which is used in JTAG configuration for the TDI signal) which
is used for the mikroBUS TM interface on its pin 3 (CS with RTS capability). If needed, the user can switch
to JTAG anytime by following the next instructions.
Table 57 shows you which shunts to solder/remove in order to either map TDI or CTS2 on P110. And
also, to rewire P708 to the mikroBUS
TM
connector in case you want to access the JTAG and the
mikroBUS TM interface at the same time (Without CTS capability).
Table 57. Multiplexing TDI / CTS2 / IRQ11
RA6M3
Pin
RA6M3
Pin Description
Selected
Function
SH33 SH34 SH35 SH36
91 P110 / CTS2 / TDI TDI F 1 NF 2 NF F
91 P110 / CTS2 / TDI CTS2 3 NF F F NF
35 P708 / IRQ11 IRQ11 X 4 X NF F
Note 1: Fitted / Soldered / Shunted
Note 2: Not Fitted / Not Soldered / Removed
Note 3: CTS2 is selected by default
Note 4: Does not matter if Fitted or Not Fitted