Panasonic MN103001G/F01K - Manual (Page 321)

Serial Interface
13-19
■ I2C mode connection
It is possible to connect a device that is capable of slave transmission and slave reception.
SDA and SCL require pull-up resistors. Connect pull-up resistors externally.
The SBO pin is an open-drain input/output, and the SBT pin is an open drain output.
Fig.13-2-14 Connections
SBO
SBI
SBT
Master
transmission/
reception
SDA
SCL
Slave
transmission/reception
Slave
transmission/reception