Renesas RA Microcontrollers EK-RA4M1 v1 – User's Manual
R20UT4579EU0100 Rev.1.00 Page 19 of 32
Oct.02.19
Limits of the 3.3 V regulator on the board, and limits of the power source supplying that regulator (especially
for USB Host devices), including the to-be-connected PMOD device, must be considered prior to connecting
a module to a PMOD connector.
5.4.7 PMOD B
A 6-pin PMOD type 4 connector is provided at PMOD B. The interface is powered for 3.3 V
modules only. The Main MCU acts as the UART DCE, and the connected module acts as
the UART DTE. This interface may additionally be re-configured in firmware as some other
PMOD type.
Signals on PMOD B are shared with Main MCU pin header J1 and J2. Care must be taken
to ensure that shared signals are not used concurrently.
Table 10. PMOD B Connector (J6)
U1 P400, GPIO (U1-1) (for RTS by Main MCU firmware)
Limits of the 3.3 V regulator on the board, and limits of the power source supplying that regulator (especially
for USB Host devices), including the to-be-connected PMOD device, must be considered prior to connecting
a module to a PMOD connector.
5.4.8 User Capacitive Touch Button
A capacitive sensor region for use as a Capacitive Touch button is provided in the board USER
INPUT region. A support circuit, TSCAP, is required for proper operation of Capacitive Touch
button(s) by the Main MCU.
To disconnect the Capacitive Touch Button from the MCU, the copper jumper E2 must be open.
To connect MCU signal P115 to Pin Header J3, the copper jumper E5 must be closed.
Table 11. Capacitive Touch Button Sensor on the Evaluation Kit Board
Figure 20. Capacitive Touch-Button Circuit
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