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EMC1822 Datasheet(PDF) 36 Page - Microchip Technology |
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EMC1822 Datasheet(HTML) 36 Page - Microchip Technology |
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36 / 103 page  Table 8-7. Receive Byte Protocol START Slave Address RD ACK Register Data NACK STOP 1 → 0 YYYY_YYY 1 0 XXh 1 0 → 1 8.9 THERM Pin Considerations Because of the decode method used to determine the System Shutdown Temperature value, it is important that the pull-up resistance on the THERM pin be within the tolerances shown in Table 7-2. For tINT_T after power-up, the THERM pin must not be pulled low or the I2C address will not be decoded properly. If the system requirements do not permit these conditions, the THERM pin must be isolated from its hard-wired OR’d bus during this time. One method of isolating this pin is shown in the following figure. Figure 8-1. THERM Pin Isolation +3.3V 22K 4.7K-33K +2.5-5V Shared THERM 1 2 3 4 VDD DP DN THERM/ ADDR Multi-Channel Low Voltage Temp Sens... System Management Bus Protocol © 2018 Microchip Technology Inc. Datasheet DS20006048A-page 36 |
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