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7220 Datasheet(PDF) 194 Page - Renesas Technology Corp |
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7220 Datasheet(HTML) 194 Page - Renesas Technology Corp |
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194 / 303 page  APPLICATION 5.4 Example of I2C-BUS interface control (M37221Mx-XXXSP/FP) 5-21 7220 Group User’s Manual 5.4 Example of I2C-BUS interface control (M37221Mx-XXXSP/FP) The M37221Mx-XXXSP/FP has multi-master I2C-BUS interface. This interface, offering both arbitration lost detection and synchronous functions, is useful for the multi-master serial communications. This paragraph explains transmit/receive control example of E2PROM (M6M80012P) adaptable to the I2C- BUS interface. For details on the I2C-BUS interface, refer to “2.8 Multi-master I2C-BUS interface.” 5.4.1 Specifications q E2PROM required: M6M80012P q Synchronous clock: internal clock q Standard clock mode: 100 kHz q Number of transfer bits: 8 bits q Data format: addressing format q Pins required: SCL1, SDA1 q Direction of data transfer: MSB first 5.4.2 Connection example Fig. 5.4.1 Connection example P11/SCL1 P13/SDA1 M37221Mx-XXXSP <Master> M6M80012P <Slave> SCL SDA SCL SDA SCL SDA : Serial clock : Serial data |
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