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X80121 Datasheet(PDF) 10 Page - Renesas Technology Corp |
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X80121 Datasheet(HTML) 10 Page - Renesas Technology Corp |
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10 / 17 page  X80120, X80121 FN8151 Rev 0.00 Page 10 of 17 January 20, 2005 V1MON tDELAY1 V1GDO Programmable Delay Timing not to scale 100ms 500ms 1 sec 5 secs V4MON tDELAY4 V4GDO Programmable Delay tSPOR Programmable Delay RESET Can Choose Different Delays for each Voltage Monitor FIGURE 8. PARALLEL POWER CONTROL - TIMING V4GDO V4MON V1GDO V1MON RESET µC VCC1 FPGA VCC1 ASIC VCC1 RESET VCC2 VCC2 VCC2 MR 5V Power Supply On/Off 1.2V Power Supply On/Off 3.3V Power Supply X80120/21 VCC 5V 12V FIGURE 9. EXAMPLE OF RELAY POWER SUPPLY SEQUENCING V1MON tDELAY1 V1GDO V1MON threshold Power Supply #2 ON Power Supply V4MON threshold V4GDO Timing Not To Scale Example: Two Independent Power Supplies in relay timing 100ms RESET Programmable Delay Programmable Delay #2 OUTPUT 500ms 1sec 5sec 100ms 500ms 1sec 5sec tDELAY4 Power Supply #3 ON Power Supply #3 OUTPUT (5V) (1.2V) (3.3V tSPOR FIGURE 10. RELAY SEQUENCING OF DC-DC SUPPLIES (TIMING) |
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