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RXB0CTRL Datasheet(PDF) 57 Page - Microchip Technology |
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RXB0CTRL Datasheet(HTML) 57 Page - Microchip Technology |
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57 / 92 page  2003-2012 Microchip Technology Inc. DS21801G-page 57 MCP2515 9.0 RESET The MCP2515 differentiates between two Resets: 1. Hardware Reset – Low on RESET pin 2. SPI Reset – Reset via SPI command Both of these Resets are functionally equivalent. It is important to provide one of these two Resets after power-up to ensure that the logic and registers are in their default state. A hardware Reset can be achieved automatically by placing an RC on the RESET pin (see Figure 9-1). The values must be such that the device is held in Reset for a minimum of 2 µs after VDD reaches operating voltage, as indicated in the electrical specification (tRL). FIGURE 9-1: RESET PIN CONFIGURATION EXAMPLE RESET R1(2) VDD VDD R C D(1) Note 1: The diode D helps discharge the capacitor quickly when VDD powers down. 2: R1 = 1 k to 10 k will limit any current flowing into RESET from external capacitor C, in the event of RESET pin breakdown due to Electrostatic Discharge (ESD) or Electrical Overstress (EOS). |
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