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CYRF69103 Datasheet(PDF) 10 Page - Cypress Semiconductor |
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CYRF69103 Datasheet(HTML) 10 Page - Cypress Semiconductor |
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10 / 68 page  CYRF69103 Document #: 001-07611 Rev *F Page 10 of 68 The PMU also provides a configurable low battery detection function which may be read over the SPI interface. One of seven thresholds between 1.8V and 2.7V may be selected. The interrupt pin may be configured to assert when the voltage on the VBAT pin falls below the configured threshold. LV IRQ is not a latched event. Battery monitoring is disabled when the device is in sleep mode. The following three figures show different examples of how to use PRoC LP with and without the PMU. Figure 8-2. shows the most common circuit making use of the PMU to boost battery voltage up to 2.7V. Figure 8-3. is an example of the circuit used when the supply voltage is always above 2.7V. This could be three 1.5V battery cells in series along with a linear regulator, or some similar power source. Figure 8-4. shows an example of using the PRoC LP with its PMU disabled and an external boost to supply power to the device. This might be required when the load is much greater than the 15 mA average load that PRoC can support. Figure 8-2. PMU Enabled Figure 8-3. PMU Disabled - Linear Regulator Figure 8-4. PMU Disabled - External Boost Converter PRoC LP 10 µF 6.3V VCC 100 µF 10V VBat BAT400D 10 µH VCC VBat 0.047 µF 0.047 µF 0.047 µF 0.047 µF 0.047 µF 10 µF 6.3V 1 µF 6.3V 0.047µF 1 Ohm 1% 47 Ohm VDD_MICRO VDD 0.1µF PRoC LP VCC 0.047µF 0.047µF 0.047µF 0.047µF 0.047µF 0.047µF 0.047µF 0.047µF VDD_MICRO VDD 0.1µF PRoC LP VCC VBat 0.047µF 0.047µF 0.047µF 0.047µF 0.047µF 10µF 6.3V 1µF 6.3V 0.047µF 1 Ohm 1% 47 Ohm External DC-DC Boost Converter VDD_MICRO VDD 0.1µF [+] Feedback |
Similar Part No. - CYRF69103_10 |
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Similar Description - CYRF69103_10 |
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