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X40430V14I-A Datasheet(PDF) 7 Page - Xicor Inc. |
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X40430V14I-A Datasheet(HTML) 7 Page - Xicor Inc. |
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7 / 24 page  X40430/X40431 – Preliminary Information Characteristics subject to change without notice. 7 of 24 REV 1.2.3 11/28/00 www.xicor.com Figure 6. VTRIP Set/Reset Sequence (X = 1, 2, 3) VTRIPX Programming Apply VCC and Voltage Decrease VX Actual VTRIPX – Desired VTRIPX DONE Set Higher VX Sequence Error < -MDE Error < | MDE | YES NO Error > +MDE Desired VTRIPX to VX Desired Present Value VTRIPX Note: X = 1, 2, 3 Execute No YES Execute VTRIP Reset Sequence Execute Set Higher VTRIP Sequence New VX applied = Old VX applied + Error New VX applied = Old VX applied - Error Execute Reset VTRIPX Sequence Let: MDE = Maximum Desired Error Output Switches? Vx = VCC, V2MON, V3MON WEL: Write Enable Latch (Volatile) The WEL bit controls the access to the memory and to the Register during a write operation. This bit is a vola- tile latch that powers up in the LOW (disabled) state. While the WEL bit is LOW, writes to any address, including any control registers will be ignored (no acknowledge will be issued after the Data Byte). The WEL bit is set by writing a “1” to the WEL bit and zeroes to the other bits of the control register. Once set, WEL remains set until either it is reset to 0 (by writing a “0” to the WEL bit and zeroes to the other bits of the control register) or until the part powers up again. Writes to the WEL bit do not cause a high volt- age write cycle, so the device is ready for the next operation immediately after the stop condition. |
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