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LPC47M192 Datasheet(PDF) 16 Page - SMSC Corporation |
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LPC47M192 Datasheet(HTML) 16 Page - SMSC Corporation |
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16 / 228 page  SMSC DS – LPC47M192 Page 16 Rev. 03/30/05 DATASHEET QFP PIN# NAME DESCRIPTION BUFFER NAME PWR WELL NOTES 97 GP54/ nDSR2 General Purpose I/O. GPIO can be configured as an Open-Drain Output. Data Set Ready 2 Input. See nDSR1 pin description above. IO8 VCC 5 94 GP51/ nDCD2 General Purpose I/O. GPIO can be configured as an Open-Drain Output. Data Carrier Detect 2 Input. See nDCD1 pin description above. IO8 VCC 5 92 GP50/ nRI2 General Purpose I/O. GPIO can be configured as an Open-Drain Output. Ring Indicator 2 Input. See nRI1 pin description above. IO8 VCC 5 PARALLEL PORT INTERFACE (17) 66 nINIT This output is bit 2 of the printer control register. This is used to initiate the printer when low. Refer to Parallel Port description for use of this pin in ECP and EPP mode. Can be configured as an Open-Drain Output. OP14 VCC 67 nSLCTIN This active low output selects the printer. This is the complement of bit 3 of the Printer Control Register. Refer to Parallel Port description for use of this pin in ECP and EPP mode. Can be Configured as an Open-Drain Output. OP14 VCC 68 PD0 Port Data 0 I/O IOP14 VCC 69 PD1 Port Data 1 I/O IOP14 VCC 70 PD2 Port Data 2 I/O IOP14 VCC 71 PD3 Port Data 3 I/O IOP14 VCC 72 PD4 Port Data 4 I/O IOP14 VCC 73 PD5 Port Data 5 I/O IOP14 VCC 74 PD6 Port Data 6 I/O IOP14 VCC 75 PD7 Port Data 7 I/O IOP14 VCC 77 SLCT This high active input from the printer indicates that it has power on. Bit 4 of the Printer Status Register reads the SLCT input. Refer to Parallel Port description for use of this pin in ECP and EPP mode. I VCC 78 PE Another status input from the printer, a high indicating that the printer is out of paper. Bit 5 of the Printer Status Register reads the PE input. Refer to Parallel Port description for use of this pin in ECP and EPP mode. I VCC 79 BUSY This is a status input from the printer, a high indicating that the printer is not ready to receive new data. Bit 7 of the Printer Status Register is the complement of the BUSY input. Refer to Parallel Port description for use of this pin in ECP and EPP mode. I VCC 80 nACK A low active input from the printer indicating that it has received the data and is ready to accept new data. Bit 6 of the Printer Status Register reads the nACK input. Refer to Parallel Port description for use of this pin in ECP and EPP mode. I VCC |
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