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FDC37M817-MS Datasheet(PDF) 8 Page - SMSC Corporation |
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FDC37M817-MS Datasheet(HTML) 8 Page - SMSC Corporation |
8 / 198 page 8 DESCRIPTION OF PIN FUNCTIONS PIN No./QFP NAME TOTAL SYMBOL BUFFER TYPE PER FUNCTION (NOTE 1) 99 Clear to Send 2/Sys Addr 13 1 nCTS2/ SA13 I/I 100 Data Terminal Ready/Sys Addr 14 1 nDTR2/ SA14 O4/I 97 Data Set Ready 2/Sys Addr 15 1 nDSR2/ SA15 I/I 94 Data Carrier Detect 2/8042 P12 1 nDCD2/P12 I/IO24 92 Ring Indicator 2/8042 P16 1 nRI2/P16 I/IO24 PARALLEL PORT INTERFACE (17) 75:68 Parallel Port Data Bus 8 PD[0:7] IO24 66 Printer Select 1 nSLCTIN OD24/O24 67 Initiate Output 1 nINIT OD24/O24 83 Auto Line Feed 1 nALF OD24/O24 82 Strobe Signal 1 nSTROBE OD24/O24 81 Busy Signal 1 BUSY I 77 Acknowledge Handshake 1 nACK I 80 Paper End 1 PE I 79 Printer Selected 1 SLCT I 78 Error at Printer 1 nERROR I KEYBOARD/MOUSE INTERFACE (6) 59 Keyboard Data 1 KDAT IOD16 58 Keyboard Clock 1 KCLK IOD16 57 Mouse Data 1 MDAT IOD16 56 Mouse Clock 1 MCLK IOD16 64 Keyboard Reset 1 KBDRST (Note 3) O4 63 Gate A20 1 A20M O4 Note: The "n" as the first letter of a signal name indicates an "Active Low" signal. Note 1:Buffered types per function on multiplexed pins are separated by a slash “/”. Buffer types in parenthesis represent multiple buffer types for a single pin function. Note 2:For 12 bit addressing, SA0:SA11 only, nCS should be tied to GND. For 16 bit external address qualification, address bits SA11:SA15 can be "ORed" together and applied to nCS. The nCS pin functions as SA11 in full 16 bit Internal Address Qualification Mode. CR24.6 controls the FDC37M81x addressing modes. Note 3:KBDRST is active low. Note 4: The pull-down on this pin is always active including when the output driver is tristated and regardless of the state of internal PWRGOOD. |
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