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LPC47M192 Datasheet(PDF) 101 Page - SMSC Corporation |
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LPC47M192 Datasheet(HTML) 101 Page - SMSC Corporation |
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101 / 228 page  SMSC DS – LPC47M192 Page 101 Rev. 03/30/05 DATASHEET A. Receive FIFO is empty B. The receiver is waiting for a start bit. Exit Auto Powerdown The transmitter exits powerdown on a write to the XMIT buffer. The receiver exits auto powerdown when MIDI_IN changes state. Parallel Port Direct power management is controlled by CR22. Refer to CR22 for more information. Auto Power Management is enabled by CR23-B3. When set, this bit allows the ECP or EPP logical parallel port blocks to be placed into powerdown when not being used. The EPP logic is in powerdown under any of the following condition 1. EPP is not enabled in the configuration register 2. EPP is not selected through ecr while in ECP mode. The ECP logic is in powerdown under any of the following condition 1. ECP is not enabled in the configuration register 2 SPP, PS/2 Parallel port or EPP mode is selected through ecr while in ECP mode. Exit Auto Powerdown The parallel port logic can change powerdown modes when the ECP mode is changed through the ecr register or when the parallel port mode is changed through the configuration registers. |
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