MCP3421 - Microchip
MCP3421 - Microchip
MCP3421 - Microchip
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<strong>MCP3421</strong>1 9 1 9 1 9 19SCLSDA1 1 0 1 A2 A1 A0D15D14D13D12D11D10D9D8D7D6D5D4D3D2D1D0C1C0S1S0G1G0Start Bit byMasterR/WACK by<strong>MCP3421</strong>ACK byMasterACK byMasterRDY O/C1st Byte<strong>MCP3421</strong> Address Byte2nd ByteUpper Data Byte3rd ByteLower Data Byte4th ByteConfiguration Byte(Optional)To continue: ACK by MasterTo end: NAK by Master19C1C0S1S0G1G0RDY O/CNAK byMasterStop Bit byMasterNth Repeated Byte:Configuration Byte(Optional)Note: – <strong>MCP3421</strong> device code is 1101.– See Figure 5-1 for details in Address Byte.– Stop bit or NAK bit can be issued any time during reading.– In 14 - bit mode: D15 and D14 are repeated MSB and can be ignored.– In 12 - bit mode: D15 - D12 are repeated MSB and can be ignored.– Configuration byte repeats as long as clock is provided after the 4th byte.FIGURE 5-4:Timing Diagram For Reading From The <strong>MCP3421</strong> With 12-Bit to 16-Bit Modes.© 2009 <strong>Microchip</strong> Technology Inc. DS22003E-page 21
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