Perpendicular Mode ................................................................................................................................ 56
LOCK ....................................................................................................................................................... 57
ENHANCED DUMPREG......................................................................................................................... 57
P
ARALLEL
P
ORT
F
LOPPY
D
ISK
C
ONTROLLER
.................................................................................................. 58
SERIAL PORT (UART) .............................................................................................................................. 59
R
EGISTER
D
ESCRIPTION
................................................................................................................................ 59
RECEIVE BUFFER REGISTER (RB) ..................................................................................................... 60
TRANSMIT BUFFER REGISTER (TB) ................................................................................................... 60
INTERRUPT ENABLE REGISTER (IER)................................................................................................ 60
INTERRUPT IDENTIFICATION REGISTER (IIR)................................................................................... 61
FIFO CONTROL REGISTER (FCR) ....................................................................................................... 62
LINE CONTROL REGISTER (LCR)
....................................................................................................... 63
MODEM CONTROL REGISTER (MCR)................................................................................................. 65
LINE STATUS REGISTER (LSR) ........................................................................................................... 65
MODEM STATUS REGISTER (MSR)..................................................................................................... 67
SCRATCHPAD REGISTER (SCR) ......................................................................................................... 67
PROGRAMMABLE BAUD RATE GENERATOR DIVISOR LATCHES .................................................. 67
The Affects of RESET on the UART Registers ....................................................................................... 69
FIFO I
NTERRUPT
M
ODE
O
PERATION
.............................................................................................................. 69
FIFO P
OLLED
M
ODE
O
PERATION
................................................................................................................... 70
N
OTES
O
N
S
ERIAL
P
ORT
FIFO M
ODE
O
PERATION
.......................................................................................... 72
GENERAL ............................................................................................................................................... 72
TX AND RX FIFO OPERATION.............................................................................................................. 72
INFRARED INTERFACE............................................................................................................................ 72
I
R
DA SIR/FIR
AND
ASKIR............................................................................................................................ 73
C
ONSUMER
IR............................................................................................................................................... 73
H
ARDWARE
I
NTERFACE
.................................................................................................................................. 73
IR H
ALF
D
UPLEX
T
URNAROUND
D
ELAY
T
IME
.................................................................................................. 73
PARALLEL PORT ...................................................................................................................................... 75
IBM XT/AT COMPATIBLE, BI-DIRECTIONAL AND EPP MODES ........................................................... 76
DATA PORT ............................................................................................................................................ 76
STATUS PORT ....................................................................................................................................... 76
CONTROL PORT .................................................................................................................................... 77
EPP ADDRESS PORT ............................................................................................................................ 78
EPP DATA PORT 0................................................................................................................................. 78
EPP DATA PORT 1................................................................................................................................. 78
EPP DATA PORT 2................................................................................................................................. 78
EPP DATA PORT 3................................................................................................................................. 78
EPP 1.9 OPERATION................................................................................................................................. 78
Software Constraints ............................................................................................................................... 79
EPP 1.9 Write .......................................................................................................................................... 79
EPP 1.9 Read.......................................................................................................................................... 79
EPP 1.7 OPERATION................................................................................................................................. 80
Software Constraints ............................................................................................................................... 80
EPP 1.7 Write .......................................................................................................................................... 80
EPP 1.7 Read.......................................................................................................................................... 80
EXTENDED CAPABILITIES PARALLEL PORT ......................................................................................... 82
Vocabulary............................................................................................................................................... 82
ISA IMPLEMENTATION STANDARD..................................................................................................... 83
Description............................................................................................................................................... 83
Register Definitions ................................................................................................................................. 84
OPERATION ........................................................................................................................................... 89
AUTO POWER MANAGEMENT ................................................................................................................ 92
FDC P
OWER
M
ANAGEMENT
.......................................................................................................................... 92
SMSC DS – FDC37N769
Page 4 of 137
Rev. 12/21/2000
SMSC [ SMSC CORPORATION ]
