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X40626S14-4.5A Datasheet(PDF) 4 Page - Xicor Inc. |
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X40626S14-4.5A Datasheet(HTML) 4 Page - Xicor Inc. |
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4 / 23 page  X40626 REV 1.1.15 2/11/04 Characteristics subject to change without notice. 4 of 23 www.xicor.com To set the new VTRIP voltage, start by setting the WEL bit in the control register, then apply the desired VTRIP threshold voltage to the VCC pin and the programming voltage, VP, to the WP pin and 2 byte address and 1 byte of “00” data. The stop bit following a valid write operation initiates the VTRIP programming sequence. Bring WP LOW to complete the operation. 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 some- thing less than 1.7V. This procedure must be used to set the voltage to a lower value. To reset the new VTRIP voltage start by setting the WEL bit in the control register, apply the desired VTRIP threshold voltage to the VCC pin and the programming voltage, VP, to the WP pin and 2 byte address and 1 byte of “00” data. The stop bit of a valid write operation initiates the VTRIP programming sequence. Bring WP LOW to complete the operation. Figure 2. Reset VTRIP Level Sequence (VCC/V2MON > 3V, WP = 12-15V, WEL bit set) Figure 3. Sample VTRIP Reset Circuit 012 345 67 SCL SDA A0H 012 345 67 00H WP VP = 12-15V 012 345 67 xxH* 012 345 6 7 00H *for VTRIP2 address is 0FH for VTRIP address is 03H 1 2 5 7 14 12 9 8 X40626 VTRIP Adj. VP RESET 4.7K SDA SCL µC Adjust Run 6 3 13 4 |
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