LPC47M192-NW Standard Microsystems (SMSC), LPC47M192-NW Datasheet - Page 101

• Manufacturer Part Number: LPC47M192-NW
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LPC47M192-NW

• Lead Free Status / RoHS Status: Compliant

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.
2.
The ECP logic is in powerdown under any of the following condition
1.
2
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.
SMSC DS – LPC47M192
A.
B.
EPP is not enabled in the configuration register
EPP is not selected through ecr while in ECP mode.
ECP is not enabled in the configuration register
SPP, PS/2 Parallel port or EPP mode is selected through ecr while in ECP mode.
Receive FIFO is empty
The receiver is waiting for a start bit.
DATASHEET
Page 101
Rev. 03/30/05