Ethercat Eeprom I C Connection Pins (R-In32M3-Ec Only); Figure 15.1 Connection Example Between R-In32M3-Ec And Ethercat Eeprom - Renesas R-IN32M3 Series User Manual

R-IN32M3 Series: Board design edition
15. EtherCAT EEPROM I
In the case of using the EtherCAT
2
EEPROM I C connection pins.
2
The EEPROM I C connection pins are following two pins.
- CATI2CCLK pin (shared with the P22 function):
- CATI2CDATA pin (shared with the P23 function): EtherCAT EEPROM I
Figure 15.1 shows a connection example between the R-IN32M3-EC and the EEPROM.
Since the serial clock line and serial data line are N-ch. open drain outputs, external pull-up resistors are required.
R-IN32M3
Clock output
P23 (CATI2CDA TA)
Data ou tpu t
Data in put

Figure 15.1 Connection Example between R-IN32M3-EC and EtherCAT EEPROM

R18UZ0021EJ0400
Dec. 28, 2018
15. EtherCAT EEPROM I2C Connection Pins (R-IN32M3-EC Only)
2
C Connection Pins (R-IN32M3-EC Only)
®
protocol, the user needs to connect to the external EEPROM with the dedicated
P22 (CATI2CCL K)
SCL
SDA
2
EtherCAT EEPROM I C clock output
2
C data
VDD33 (3.3 V)
SCL
VDD33 (3.3 V)
SDA
Slave device
Clock inpu t
Data ou tpu t
Data in put
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