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M37151M6 Datasheet(PDF) 34 Page - Renesas Technology Corp |
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M37151M6 Datasheet(HTML) 34 Page - Renesas Technology Corp |
34 / 138 page ![]() M37151M6/M8/MA/MC/MF-XXXFP, M37151EFFP Rev.1.00 Nov 01, 2002 page 34 of 136 REJ03B0129-0100Z Fig. 8.6.6 I2C Control Register b7 b6 b5 b4 b3 b2 b1 b0 0 to 2 Bit counter (Number of transmit/recieve bits) (BC0 to BC2) b2 b1 b0 0 0 0 : 8 0 0 1 : 7 0 1 0 : 6 0 1 1 : 5 1 0 0 : 4 1 0 1 : 3 1 1 0 : 2 1 1 1 : 1 3I2C-BUS interface use enable bit (ESO) 0 : Disabled 1: Enabled 4 Data format selection bit(ALS) 0 : Addressing mode 1 : Free data format 5 Addressing format selection bit (10BIT SAD) 0 : 7-bit addressing format 1 : 10-bit addressing format 6, 7 Connection control bits between I2C-BUS interface and ports (BSEL0, BSEL1) b7 b6 Connection port (See note) 0 0: None 0 1: SCL1, SDA1 1 0: SCL2, SDA2 1 1: SCL1, SDA1 0 0 0 0 0 I2C control register (S1D) [Address 00F916] I2C Control Register B Name Functions After reset R W Note: • Set the corresponding direction register to "1" to use the port as multi-master I2C-BUS interface. • To use SCL1, SDA1, SCL2 and SDA2, set the port P3 Register (address 00C616) bit 2 to 0. R W R W R W R W R W SCL2, SDA2 Fig. 8.6.7 Port P3 Register Port P3 register (P3) [Address 00C616] Port P3 register 0 1 2 Port P3 register Indeterminate Indeterminate W R 4 to 7 b7 b6 b5 b4 b3 b2 b1 b0 Nothing is assigned. This bit is write disable bit. When this bit is read out, the value is "0." W R 0 W R 0 – R 3 (BSEL20) (See note) 0 W R SCL3/P31-SCL1/P11 SDA3/P30-SDA1/P13 Connection control bit (BSEL21) Notes • For the ports used as the Multi-master I 2C-BUS interface, set their direction registers to 1. • To use SCL3 and SDA3, set the I 2C Control Register (address 00F916) bits 6–7 to 0. BName Functions After reset R W Port P30 data Port P31 data Switch bit of I 2C-BUS interface and port P3 0: Port P30, Port P31 1: I 2CBUS (SDA3,SCL3) 0: Cutting 1: Connection |
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