Figure 12. Pmod 1 Connector; Table 15. Pmod 2 Connector - Renesas RA4 Series User Manual

Renesas RA Family
Pmod 1 Connector Default
J26-6 VCC
J26-7 GPIO / INT (slave to master)
J26-8 GPIO / RESET (master to slave)
J26-9 GPIO
J26-10 GPIO
J26-11 GND
J26-12 VCC
Note: Exercise caution while modifying power source trace jumpers, E16 and E17. Permanent
damage to the EK-RA4E2 board and/or connected modules may result.
Pin 6
Pin 12
5.3.3.2 Pmod 2
A 12-pin Pmod connector is provided at J25, Pmod 2. This Pmod is dedicated type-3A (expanded UART).
There are two options for SCI0 on Pmod 2. By cutting trace-cut links E79 and E80, and connecting solder-
bridge links E77 and E78, the secondary option is selected. The secondary option can only be used if the
main 20 MHz clock crystal is not being used. This also requires that trace-cut links E68 and E69 are cut, and
solder-bridge links E70 and E71 are connected. The benefit of using P212 and P213 over P410 and P411 is
that the serial data exchanged with Pmod 2 is not also shared with the debugger serial console.

Table 15. Pmod 2 Connector

Pmod 2 Connector
Pin Description
J25-1 CTS
J25-2 TXD
J25-3 RXD
J25-4 RTS
J25-5 GND
J25-6 VCC
J25-7 GPIO / INT (slave to master)
J25-8 GPIO / RESET (master to slave)
J25-9 GPIO
J25-10 GPIO
J25-11 GND
J25-12 VCC
*Note: The use of these options also requires the disconnection of 20 MHz crystal Y1 (open links E68 and
E69) and the shorting of links E70 and E71.
R20UT5175EG0300 Rev. 3.00
Feb.27.23
EK-RA4E2
+3.3 V
+5.0 V
P105 (IRQ0)
P408
P015
P014
GND
+3.3 V
+5.0 V

Figure 12. Pmod 1 Connector

EK-RA4E2
Signal/Bus
P302 (CTS0)
P411 (TXD0)
P213 (TXD0)
P410 (RXD0)
P212 (RXD0)
P103 (CTS_RTS0)
GND
+3.3V
P409 (IRQ6)
P102
P107
P106
GND
+3.3V
EK-RA4E2 v1 – User's Manual
Pmod 1 Configuration
E16
E17
E16
E17
Pin 1
Pin 7
Pmod 2 Configuration
Short
E79
E77
E80
E78
E17
E16
E17
E16
Open
E77
E79*
E78
E80*
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