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X5045PI-2.7A Datasheet(PDF) 4 Page - Xicor Inc. |
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X5045PI-2.7A Datasheet(HTML) 4 Page - Xicor Inc. |
4 / 20 page X5043/X5045 Characteristics subject to change without notice. 4 of 20 REV 1.1.2 5/29/01 www.xicor.com 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 VTRIP voltage, apply at least 3V to the VCC pin and tie the WP pin to the programming voltage VP. Then send a WREN command, followed by a write of Data 00h to address 03h. CS going HIGH on the write operation initiates the VTRIP programming sequence. Bring WP LOW to complete the operation. Note: This operation also writes 00h to array address 03h. Figure 2. Reset VTRIP Level Sequence (VCC > 3V. WP = 15–18V) Figure 3. Sample VTRIP Reset Circuit 012 345 67 SCK SI CS 06h 012 345 67 89 10 12 13 14 15 8 Bits 03h 02h WP VPE = 15-18V 00h WREN Write Address Data 11 1 2 3 4 8 7 6 5 X5043 VTRIP Adj. VP RESET 4.7K SI SO CS SCK µC Adjust Run X5045 |
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