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MCP4451T-103E/ML Datasheet(PDF) 61 Page - Microchip Technology |
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MCP4451T-103E/ML Datasheet(HTML) 61 Page - Microchip Technology |
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61 / 94 page  2010 Microchip Technology Inc. DS22267A-page 61 MCP443X/5X FIGURE 7-4: I2C Read (Last Memory Address Accessed). FIGURE 7-5: I2C Random Read. STOP bit Control Byte 1 010 S 1 A1 A0 1 A Fixed Address Variable Address Read bits P 0 000 0 0 0 D8 A1 Read bit D3 D7 D6 D5 D4 D2 D1 D0 A2 Read Data bits Note 1: Master Device is responsible for A / A signal. If a A signal occurs, the MCP44XX will abort this transfer and release the bus. 2: The Master Device will Not Acknowledge, and the MCP44XX will release the bus so the Master Device can generate a Stop or Repeated Start condition. 3: The MCP44XX retains the last “Device Memory Address” that it has received. This is the MCP44XX does not “corrupt” the “Device Memory Address” after Repeated Start or Stop conditions. 4: The Device Memory Address pointer defaults to 00h on POR and BOR conditions. STOP bit Control Byte READ Command 1 01 0 S 1 A1 A0 0 1 AD AD AD AD A1 x X A Sr 0 1 2 3 Fixed Address Variable Address Device Memory Address Command Control Byte Read bits P 0 00 0 0 0 0 D8 A1 Write bit D3 D7 D6 D5 D4 D2 D1 D0 A2 1 0 1 0 1 A1 A0 1 A Read bit Repeated Start bit Read Data bits Note 1: Master Device is responsible for A / A signal. If a A signal occurs, the MCP44XX will abort this transfer and release the bus. 2: The Master Device will Not Acknowledge, and the MCP44XX will release the bus so the Mas- ter Device can generate a Stop or Repeated Start condition. 3: The MCP44XX retains the last “Device Memory Address” that it has received. This is the MCP44XX does not “corrupt” the “Device Memory Address” after Repeated Start or Stop conditions. |
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