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MCP454X Datasheet(PDF) 41 Page - Microchip Technology |
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MCP454X Datasheet(HTML) 41 Page - Microchip Technology |
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41 / 92 page  © 2008 Microchip Technology Inc. DS22107A-page 41 MCP454X/456X/464X/466X 4.2.2.2 Terminal Control (TCON) Register This register contains 8 control bits. Four bits are for Wiper 0, and four bits are for Wiper 1. Register 4-2 describes each bit of the TCON register. The state of each resistor network terminal connection is individually controlled. That is, each terminal connection (A, B and W) can be individually connected/ disconnected from the resistor network. This allows the system to minimize the currents through the digital potentiometer. The value that is written to this register will appear on the resistor network terminals when the serial command has completed. When the WL1 bit is enabled, writes to the TCON register bits R1HW, R1A, R1W, and R1B are inhibited. When the WL0 bit is enabled, writes to the TCON register bits R0HW, R0A, R0W, and R0B are inhibited. On a POR/BOR this register is loaded with 1FFh (9-bits), for all terminals connected. The Host Controller needs to detect the POR/BOR event and then update the Volatile TCON register value. Additionally, there is a bit which enables the operation of General Call commands. |
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