nPME
SMI
PME
WDT
MULTI-MODE
PARALLEL
PORT/FDC
MUX
PD0-7
BUSY, SLCT, PE,
nERROR, nACK
nSTB, nSLCTIN,
nINIT, nALF
ADDRESS BUS
DATA BUS
SER_IRQ
PCI_CLK
SERIAL
IRQ
nIOR
nIOW
AEN
SA[0:12] (nCS)
*
SA[13-15]
SD[O:7]
DRQ[1:3]
*
nDACK[1:3]
TC
RESET_DRV
IOCHRDY
RDATA
*
*
CONFIGURATION
REGISTERS
16C550
COMPATIBLE
SERIAL
PORT 1
TXD1, nCTS1, nRTS1
RXD1
nDSR1, nDCD1, nRI1, nDTR1
CONTROL BUS
HOST
CPU
INTERFACE
WCLOCK
WDATA
16C550
COMPATIBLE
SERIAL
PORT 2 WITH
INFRARED
IRRX, IRTX
*
TXD2(IRTX), nCTS2, nRTS2
*
RXD2(IRRX)
*
nDSR2, nDCD2, nRI2, nDTR2
SMSC
PROPRIETARY
DIGITAL
DATA
82077
SEPARATOR
COMPATIBLE
WITH WRITE
VERTICAL
PRECOM-
FLOPPYDISK
PENSATION
CONTROLLER
CORE
RCLOCK
8042
CLOCK
GEN
nINDEX DENSEL nDS0
nTRK0 nDIR nMTR0
nWDATAnRDATA
nDSKCHG
nSTEP DRVDEN0
nWRPRT
*
nHDSEL DRVDEN1
CLK32 CLOCKI
32KHz 14MHz nWGATE
KCLK
KDATA
MCLK
MDATA
GATEA20, KRESET
P12
*
, P16
*
V
TR
Vcc Vss
*
Denotes Multifunction Pins
FIGURE 1 - FDC37B77x BLOCK DIAGRAM
11
SMSC [ SMSC CORPORATION ]
