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CYW43364KUBGT Datasheet(PDF) 10 Page - Cypress Semiconductor |
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CYW43364KUBGT Datasheet(HTML) 10 Page - Cypress Semiconductor |
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10 / 68 page  Document Number: 002-14781 Rev. *C Page 10 of 68 PRELIMINARY CYW43364 2.5 Power-Off Shutdown The CYW43364 provides a low-power shutdown feature that allows the device to be turned off while the host, and any other devices in the system, remain operational. When the CYW43364 is not needed in the system, VDDIO_RF and VDDC are shut down while VDDIO remains powered. This allows the CYW43364 to be effectively off while keeping the I/O pins powered so that they do not draw extra current from any other devices connected to the I/O. During a low-power shutdown state, provided VDDIO remains applied to the CYW43364, all outputs are tristated, and most input signals are disabled. Input voltages must remain within the limits defined for normal operation. This is done to prevent current paths or create loading on any digital signals in the system, and enables the CYW43364 to be fully integrated in an embedded device and to take full advantage of the lowest power-savings modes. When the CYW43364 is powered on from this state, it is the same as a normal power-up, and the device does not retain any information about its state from before it was powered down. 2.6 Power-Up/Power-Down/Reset Circuits The CYW43364 has two signals (see Table 2) that enable or disable the WLAN circuits and the internal regulator blocks, allowing the host to control power consumption. For timing diagrams of these signals and the required power-up sequences, see Section 14.: “Power-Up Sequence and Timing,” on page 62. Table 2. Power-Up/Power-Down/Reset Control Signals Signal Description WL_REG_ON This signal is used by the PMU to power-up the WLAN section. When this pin is high, the regulators are enabled and the WLAN section is out of reset. When this pin is low, the WLAN section is in reset. This pin has an internal 200 kΩ pull-down resistor that is enabled by default. It can be disabled through programming. |
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Similar Description - CYW43364KUBGT |
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