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AN332 Datasheet(PDF) 15 Page - Silicon Laboratories |
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AN332 Datasheet(HTML) 15 Page - Silicon Laboratories |
15 / 302 page AN332 Rev. 1.0 15 Command 0x11. POWER _DOWN Moves the device from powerup to powerdown mode. The CTS bit (and optional interrupt) is set when it is safe to send the next command. This command may only be sent when in powerup mode. Note that only the POWER_UP command is accepted in powerdown mode. If the system controller writes a command other than POWER_UP when in powerdown mode, the device does not respond. The device will only respond when a POWER_UP command is written. GPO pins are powered down and not active during this state. For optimal power down current, GPO2 must be either internally driven low through GPIO_CTL command or externally driven low. Note: In FMTX component 1.0 and 2.0, a reset is required when the system controller writes a command other than POW- ER_UP when in powerdown mode. Note: The following describes the state of all the pins when in powerdown mode: GPIO1, GPIO2, and GPIO3 = 0 DIN, DFS, RIN, LIN = HiZ Available in: All Command arguments: None Response bytes: None Command Response Bit D7 D6 D5 D4 D3 D2 D1 D0 CMD 00 0 1 0 0 0 1 Bit D7D6D5 D4 D3 D2 D1 D0 STATUS CTS ERR X X X RDSINT ASQINT STCINT |
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