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M32C83T Datasheet(PDF) 218 Page - Renesas Technology Corp |
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M32C83T Datasheet(HTML) 218 Page - Renesas Technology Corp |
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218 / 527 page  Page 195 8 8 4 f o 6 0 0 2 , 1 3 . n a J 1 3 . 1 . v e R 1 3 1 0 - 4 3 0 0 B 9 0 J E R 16. Serial I/O (Special Function) ) T 3 8 / C 2 3 M , 3 8 / C 2 3 M ( p u o r G 3 8 / C 2 3 M 16.3 Special Mode 1 (I2C Mode) I2C mode is a mode to communicate with external devices with a simplified I2C . Table 16.12 lists specifi- cations of I2C mode. Table 16.13 lists registers to be used and settings, Table 16.14 lists each function. Figure 16.19 shows a block diagram of I2C mode. Figure 16.20 shows timings for transfer to the UiRB register and interrupts. Tables 16.14 to 16.16 list pin settings. As shown in Table 16.14, I2C mode is entered when the SMD2 to SMD0 bits in the UiMR register is set to "0102" and the IICM bit in the UiMR register is set to "1". SDAi output changes after SCLi becomes low ("L") and stabilizes due to a SDAi output via the delay circuit. Table 16.12 I2C Mode Specifications Item Specifications Interrupt Start condition detect, stop condition detect, no acknowledgment detect, acknowledgment detect Selectable Function • Arbitration lost The update timing of the ABT bit in the UiRB register can be selected. Refer to 16.3.3 Arbitration. • SDAi digital delay Selected from no digital delay or 2 to 8 cycle delay of the count source of BRG. Refer to 16.3.5 SDA Output. • Clock phase setting Selected from clock delay or no clock delay. Refer to 16.3.4 Transfer Clock. |
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