Renesas EK-RA4E2

Renesas RA Family EK-RA4E2 v1 – User's Manual
R20UT5175EG0300 Rev. 3.00 Page 20 of 30
Feb.27.23
Pmod 1 Connector Default
EK-RA4E2
Pmod 1 Configuration
J26-6
VCC
+3.3 V
E16
E17
+5.0 V
E17
E16
J26-7
GPIO / INT (slave to master)
P105 (IRQ0)
J26-8
GPIO / RESET (master to slave)
P408
J26-9
GPIO
P015
J26-10
GPIO
P014
J26-11
GND
GND
J26-12
VCC
+3.3 V
E16
E17
+5.0 V
E17
E16
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.
Figure 12. Pmod 1 Connector
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
EK-RA4E2
Pmod 2 Configuration
Pin
Description
Signal/Bus
Short
Open
J25-1
CTS
P302 (CTS0)
J25-2
TXD
P411 (TXD0)
E79
E77
P213 (TXD0)
E77
E79*
J25-3
RXD
P410 (RXD0)
E80
E78
P212 (RXD0)
E78
E80*
J25-4
RTS
P103 (CTS_RTS0)
J25-5
GND
GND
J25-6
VCC
+3.3V
J25-7
GPIO / INT (slave to master)
P409 (IRQ6)
J25-8
GPIO / RESET (master to slave)
P102
J25-9
GPIO
P107
J25-10
GPIO
P106
J25-11
GND
GND
J25-12
VCC
+3.3V
*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.
Pin 1
Pin 7
Pin 6
Pin 12