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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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NRF7002-QFAA-R7 데이터시트(PDF) 43 Page - Nordic Semiconductor |
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NRF7002-QFAA-R7 데이터시트(HTML) 43 Page - Nordic Semiconductor |
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43 / 61 page  Hardware and layout • De-assert BUCKEN and power down IOVDD • Power down VBAT There are no specific timing delay requirements as long as the sequence is correct. 14.3.3 Supply system alternatives There are two options (high voltage and normal voltage) for connecting nRF7002 to an nRF5340 host, supporting dynamic powerup/powerdown of the nRF7002. This dynamic control utilises an external switch to control the IOVDD supply. The following figure shows the recommended connection between nRF7002 and the host MCU (nRF5340). 32 MHz 40 MHz nRF5340 (High voltage mode) VDDH VDD GPIO (Q)SPI GPIO GPIO GPIO nRF7002 IOVDD HOST_IRQ COEX BUCKEN VBAT BUCKVBAT AFEVBAT OTPVDD PWRIOVDD (Q)SPI 1.8 V 3.6 V 3.6 V 1.8 V (2.5 V) Figure 19: Supply system - high voltage mode Both nRF5340 (used in high voltage mode) and nRF7002 can be supplied from a single 3.6 V supply. nRF5340 can provide a 1.8 V supply used for the IO supply on nRF7002. An external switch is used to disconnect IOVDD on nRF7002 when not in use. The control of the switch is handled by the Wi-Fi driver on nRF5340. 4486_184 v1.0 43 |
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