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поискавой системы для электроныых деталей |
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поискавой системы для электроныых деталей |
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M38045F2HKP датащи(PDF) 228 Page - Renesas Technology Corp |
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M38045F2HKP датащи(HTML) 228 Page - Renesas Technology Corp |
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228 / 387 page  2-104 APPLICATION 2.5 Multi-master I2C-BUS interface Rev.1.00 Jan 14, 2005 REJ09B0212-0100Z 3804 Group (Spec.H) ➃ Reception of lower data Confirm correct completion of communication at ➂ before receiving the lower data. After confirming correct completion, clear the ACK bit (bit 6 of address 001516) to “0”, in which ACK is returned, and set to the master receive mode. After that, write dummy data to the I2C data shift register (address 001116). When the MST bit (bit 7 of address 001316) is “0”, perform the error process explained as follows and return to the process ➀. When the last receive bit (LRB bit; bit 0 of address 001316) is “1”, generate the STOP condition and make the bus release, because the slave device specified on the SMBUS does not exist. Fig. 2.5.25 Reception process of lower data 1 (STOP condition) AL (address 001316), bit 3 ? MST (address 001316), bit 7 ? 0 (ACK) 1 (master) S2 (address 001516) ← 100001012 LRB (address 001316), bit 0 ? 0 (slave) 1 (NACK) 1 (detected) 0 (not detected) End Re-transmission preparation Error processing S1 (address 001316) ←101000002 S0 (address 001116) ← 111111112 PIN (address 001316), bit 4 ? 0 (transmission of RESTART condition) • Master receive mode set 4 STOP condition output • Judgment of bus hold • Judgment of arbitration lost detection • ACK confirmation • “ACK clock is used” select and “ACK is returned” set • Judgment of slave mode detection • Dummy data to I2C data shift register write |
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