Renesas RA Family
FPB-RA4E1 v1 – User's Manual
R20UT4958EG0100 Rev 1.00
Page 14 of 23
Sep.07.21
5.3 Ecosystem
The Ecosystem connectors provide users the option to simultaneously connect several third-party add-on
modules compatible with two popular ecosystems using the following connectors:
1. Two Digilent Pmod™ (SPI and UART) connectors
2. Arduino™ (Uno R3) connectors
5.3.1 Digilent Pmod™
Connectors
5.3.1.1 Pmod 1
A 12-pin right angle connector can be fitted at PMOD1. A suitable part is Samtec SSW-106-02-T-D-RA. The
connections support Pmod Type-2A (expanded SPI) and Type-3A (expanded UART). The RA MCU acts as
the SPI master, and the connected module acts as an SPI slave device. This interface may additionally be
re-configured in firmware as several other Pmod types.
Table 5. Pmod 1 Connector
Pmod1 Connector Default
FPB-RA4E1
Pmod 1
Configuration
Pin
Description
Option
Type 6A
Signal/Bus
Short
Open
PMOD1-1
SS / CTS
NC/INT
P103 (SSLA0/CTS0)
PMOD1-2
MOSI / TXD
NC/RESET
P101 (MOSIA/TXD0)
PMOD1-3
MISO / RXD
P100 (MISOA/RXD0)
E6
E5
SCL
P400 (SCL0)
E5
E6
PMOD1-4
SCK
P102 (RSPCKA)
E3
E4
SDA
P401 (SDA0)
E4
E3
PMOD1-5
GND
GND
PMOD1-6
VCC
+3.3 V
E1
E2
+5.0 V
E2
E1
PMOD1-7
GPIO / INT (slave to master)
P015 (IRQ13)
PMOD1-8
GPIO / RESET (master to slave)
P014
PMOD1-9
GPIO / CS2
P105 (GPIO/SSLA2)
PMOD1-10
GPIO / CS3
P106 (GPIO/SSLA3)
PMOD1-11
GND
GND
PMOD1-12
VCC
+3.3 V
E1
E2
+5.0 V
E2
E1
Figure 9. Pmod 1
The default setting of the Pmod 1 interface su5 V devices. Please ensure that any Pmod device
installed is compatible with a +5 V supply.
Pmod Type 6A Operation
Pmod 1 can be configured to support proposed Pmod Type 6A connector specification supporting I
2
C
connections. There is also an alternative 3.3 V power source option. In order to configure Pmod 1 for Type
6A operation, modify the trace cut jumpers as described in Table 5. The trace cut jumpers are shown in
Figure 10.
Pin 1
Pin 7
Pin 6
Pin 12
