Output Drivers
Active output drivers in the FDC37N3869 will always achieve the minimum specified DC Electrical Characteristics
shown in Table 120.
Note: If there is a pull-up on an external node driven by an active output driver the FDC37N3869 may sink current
from the pull-up through the low impedance source.
PWRGD/nGAMECS
Vss (4)
Vcc (2)
nSLCTIN/nSTEP,nINI
T/nDIR, nAUTOFD/
nDENSEL,
POWER
MANAGEMENT
nSTROBE/nDS0,
BUSY/nMTR1,
nACK/nDS1,
MULTI-MODE
PARALLEL
PORT/FDC
MUX
PE/nWRDATA,nERR
OR/nHDSEL,
DATA BUS
PD0/nINDEX,
PD1/nTRK0,
PD2/nWRTPRT,
PD3/nRDATA,
PD4/nDSKCHG,
nCS
ADDRESS BUS
PD6/nMTR,
PD5/
PD7
nIOR
nIOW
AEN
CONFIGURATION
16C550
COMPATIBLE
SERIAL
REGISTERS
TXD1, nCTS1, nRTS1,
RXD1
A0-A15
PORT 1
nDSR1, nDCD1, nRI,
nDTR1
CONTROL BUS
D0-D7
DRQ_A-D
nDACK_A-D
TC
HOST
CPU
IR Mode/IRR3
WDATA
INTERFACE
16C550
TXD2/IRTX,nCTS2,
nRTS2
COMPATIBLE
WCLOCK
SERIAL
SMSC
PORT 2 WITH
RXD2/IRRX
PROPRIETARY
INFRARED
DIGITAL
DATA
nDSR2,nDCD2,
nRI2,nDTR2
82077
COMPATIBLE
SEPARATOR
WITH WRITE
PRECOM-
SIRQ
VERTICAL
FLOPPYDISK
PENSATION
CONTROLLER
CLK33
nADRX/nCLKRUN
RESET
CORE
RCLOCK
RDATA
IRRX2, IRTX2
IR
IRQIN
CLOCK
GEN
IOCHRDY
nDS0
nMTR0
nHDSEL
nINDEX
nDIR
nSTEP
GAME
PORT
DECODER
nTRK0
See Power Mgt
nRDATA
14.318
nDSKCHG
nWRPRT
nWGATE
DRVDEN0
DRVDEN1
CLOCK
nWDATA
FIGURE 2 - FDC37N3869 BLOCK DIAGRAM
SMSC DS – FDC37N3869
Page 16
Rev. 10/25/2000
SMSC [ SMSC CORPORATION ]
