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X3100 Datasheet(PDF) 8 Page - Xicor Inc. |
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X3100 Datasheet(HTML) 8 Page - Xicor Inc. |
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8 / 40 page  X3100/X3101 – Preliminary Information Characteristics subject to change without notice. 8 of 40 REV 1.1.8 12/10/02 www.xicor.com CONFIGURATION REGISTER The X3100 and X3101 can be configured for specific user requirements using the Configuration Register. Table 1. Configuration Register Functionality Table 2. Configuration Register—Upper Byte Table 3. Configuration Register—Lower Byte Over-charge Voltage Settings VOV1 and VOV0 control the cell over-charge level. See section “Over-charge Protection” on page 13. Table 4. Over-charge Voltage Threshold Selection Over-discharge Settings VUV1 and VUV0 control the cell over-discharge (under voltage threshold) level. See section “Over-discharge Protection” on page 15. Over-current Settings VOC1 and VOC0 control the pack over-current level. See section “Over-Current Protection” on page 18. Table 6. Over-Current Threshold Voltage Selection. Cell Charge Enable Settings VCE1, VCE0 and SWCEN control the pack charge enable function. SWCEN enables or disables a circuit that prevents charging if the cells are at too low a voltage. VCE1 and VCE0 select the voltage that is recognized as too low. See section “Sleep Mode” on page 15. Table 7. Cell Charge Enable Function Bit(s) Name Function 0-5 – (don’t care) 6 SWCEN Switch Cell Charge Enable threshold function ON/OFF 7 CELLN Set the number of Li-Ion battery cells used (3 or 4) 8-9 VCE1-VCE0 Select Cell Charge Enable threshold 10-11 VOC1-VOC0 Select over-current threshold 12-13 VUV1-VUV0 Select over-discharge (under voltage) threshold 14-15 VOV1-VOV0 Select over-charge voltage threshold 15 14 13 12 11 10 9 8 VOV1 VOV0 VUV1 VUV0 VOC1 VOC0 VCE1 VCE0 X3100 Default = 30H; X3101 Default = 00H. 7 6 543210 CELLN SWCEN x x x x x x X3100 Default = C0H; X3101 Default = 40H. Configuration Register Bits Operation VOV1 VOV0 00 VOV = 4.20V (Default) 01 VOV = 4.25V 10 VOV = 4.30V 11 VOV = 4.35V Table 5. Over-discharge Threshold Selection. Configuration Register Bits Operation VUV1 VUV0 X3100 X3101 00 VUV=1.95V VUV=2.25V (X3101 default) 01 VUV=2.05V VUV=2.35V 10 VUV=2.15V VUV=2.45V 11 VUV=2.25V (X3100 default) VUV=2.55V Configuration Register Bits Operation VOC1 VOC0 00 VOC=0.075V (Default) 01 VOC=0.100V 10 VOC=0.125V 11 VOC=0.150V Configuration Register Bit Operation SWCEN 0 Charge enable function: ON 1 Charge enable function: OFF |
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