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X4003M8 Datasheet(PDF) 5 Page - Intersil Corporation |
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X4003M8 Datasheet(HTML) 5 Page - Intersil Corporation |
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5 / 16 page  5 FN8113.2 June 30, 2008 Resetting the VTRIP Voltage This procedure is used to set the VTRIP to a “native” voltage level. For example, if the current VTRIP is 4.4V and the new VTRIP must be 4.0V, then the VTRIP must be reset. When VTRIP is reset, the new VTRIP is something less than 1.7V. This procedure must be used to set the voltage to a lower value. To reset the new VTRIP voltage, apply the desired VTRIP threshold voltage to the VCC pin and tie the WP pin to the programming voltage VP. Then write 00h to address 03h. The stop bit of a valid write operation initiates the VTRIP programming sequence. Bring WP LOW to complete the operation. 01 2 3 4 5 67 SCL SDA A0h 01 2 3 4 5 67 03h WP VP = 15V TO 18V 01 2 3 45 6 7 00h FIGURE 3. RESET VTRIP LEVEL SEQUENCE (VCC > 3V. WP = 15V TO 18V) 1 2 3 4 8 7 6 5 X4003 VTRIP ADJ. VP RESET/RESET 4.7k SDA SCL µC ADJUST RUN FIGURE 4. SAMPLE VTRIP RESET CIRCUIT X4005 X4003, X4005 |
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