Relative Seek...................................................................................................................................... 54
Perpendicular Mode.......................................................................................................................... 55
LOCK................................................................................................................................................. 56
ENHANCED DUMPREG.................................................................................................................. 56
PARALLEL PORT FLOPPY DISK CONTROLLER......................................................................................... 57
SERIAL PORT (UART) ..................................................................................................................... 58
REGISTER DESCRIPTION ......................................................................................................................... 58
RECEIVE BUFFER REGISTER (RB) ............................................................................................... 59
TRANSMIT BUFFER REGISTER (TB)............................................................................................. 59
INTERRUPT ENABLE REGISTER (IER) ......................................................................................... 59
INTERRUPT IDENTIFICATION REGISTER (IIR) .......................................................................... 59
FIFO CONTROL REGISTER (FCR)................................................................................................. 61
LINE CONTROL REGISTER (LCR).............................................................................................. 61
MODEM CONTROL REGISTER (MCR).......................................................................................... 63
LINE STATUS REGISTER (LSR) ...................................................................................................... 64
MODEM STATUS REGISTER (MSR)............................................................................................... 65
SCRATCHPAD REGISTER (SCR) .................................................................................................... 66
PROGRAMMABLE BAUD RATE GENERATOR DIVISOR LATCHES ........................................... 66
The Affects of RESET on the UART Registers................................................................................... 68
FIFO INTERRUPT MODE OPERATION...................................................................................................... 68
FIFO POLLED MODE OPERATION........................................................................................................... 69
NOTES ON SERIAL PORT FIFO MODE OPERATION ................................................................................. 71
GENERAL.......................................................................................................................................... 71
TX AND RX FIFO OPERATION....................................................................................................... 71
INFRARED INTERFACE ................................................................................................................. 71
IRDA SIR/FIR AND ASKIR................................................................................................................... 72
CONSUMER IR........................................................................................................................................ 72
HARDWARE INTERFACE.......................................................................................................................... 72
IR HALF DUPLEX TURNAROUND DELAY TIME....................................................................................... 72
PARALLEL PORT ............................................................................................................................. 74
IBM XT/AT COMPATIBLE, BI-DIRECTIONAL AND EPP MODES .............................................. 75
DATA PORT...................................................................................................................................... 75
STATUS PORT .................................................................................................................................. 75
CONTROL PORT .............................................................................................................................. 76
EPP ADDRESS PORT....................................................................................................................... 77
EPP DATA PORT 0........................................................................................................................... 77
EPP DATA PORT 1........................................................................................................................... 77
EPP DATA PORT 2........................................................................................................................... 77
EPP DATA PORT 3........................................................................................................................... 77
EPP 1.9 OPERATION........................................................................................................................... 77
Software Constraints ......................................................................................................................... 78
EPP 1.9 Write.................................................................................................................................... 78
EPP 1.9 Read .................................................................................................................................... 78
EPP 1.7 OPERATION........................................................................................................................... 79
Software Constraints ......................................................................................................................... 79
EPP 1.7 Write.................................................................................................................................... 79
EPP 1.7 Read .................................................................................................................................... 79
EXTENDED CAPABILITIES PARALLEL PORT.............................................................................. 81
Vocabulary ........................................................................................................................................ 81
ISA IMPLEMENTATION STANDARD ............................................................................................. 82
Description ........................................................................................................................................ 82
Register Definitions........................................................................................................................... 83
OPERATION ..................................................................................................................................... 88
SMSC DS – FDC37N769
Page 4 of 137
Rev. 02-16-07
DATASHEET
SMSC [ SMSC CORPORATION ]
