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M37151M6 Datasheet(PDF) 29 Page - Renesas Technology Corp |
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M37151M6 Datasheet(HTML) 29 Page - Renesas Technology Corp |
29 / 138 page M37151M6/M8/MA/MC/MF-XXXFP, M37151EFFP Rev.1.00 Nov 01, 2002 page 29 of 136 REJ03B0129-0100Z Function In conformity with Philips I2C-BUS standard: 10-bit addressing format 7-bit addressing format High-speed clock mode Standard clock mode In conformity with Philips I2C-BUS standard: Master transmission Master reception Slave transmission Slave reception 16.1 kHz to 400 kHz ( φ = at 4 MHz) Table 8.6.1 Multi-master I2C-BUS Interface Functions Item Format Communication mode SCL clock frequency φ : System clock = f(XIN)/2 Note : We are not responsible for any third party’s infringement of patent rights or other rights attributable to the use of the control function (bits 6 and 7 of the I2C control register at address 00F916) for connections between the I2C-BUS interface and ports (SCL1, SCL2, SDA1, SDA2). 8.6 MULTI-MASTER I2C-BUS INTERFACE The multi-master I2C-BUS interface is a serial communications cir- cuit, conforming to the Philips I2C-BUS data transfer format. This interface, offering both arbitration lost detection and synchronous function, is useful for multi-master serial communications. Figure 8.6.1 shows a block diagram of the multi-master I2C-BUS in- terface and Table 8.6.1 shows multi-master I2C-BUS interface func- tions. This multi-master I2C-BUS interface consists of the address register, the data shift register, the clock control register, the control register, the status register and other control circuits. Fig. 8.6.1 Block Diagram of Multi-master I2C-BUS Interface I2C address register (S0D) b7 b0 SAD6 SAD5 SAD4 SAD3 SAD2 SAD1 SAD0 RBW Noise elimination circuit Serial data (SDA) Address comparator b7 I2C data shift register b0 Data control circuit I2C clock control register (S2) System clock ( φ) Interrupt generating circuit Interrupt request signal (IICIRQ) b7 MST TRX BB PIN AL AAS AD0 LRB b0 I2C status register (S1) b7 b0 BSEL1 BSEL0 10BIT SAD ALS BC2 BC1 BC0 I2C control register (S1D) I2C control register (S1D) Bit counter BB circuit Clock control circuit Noise elimination circuit Serial clock (SCL) b7 b0 ACK ACK BIT FAST MODE CCR4 CCR3 CCR2 CCR1 CCR0 Internal data bus Clock division S0 AL circuit ESO |
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