LPC47N227TQFP Standard Microsystems (SMSC), LPC47N227TQFP Datasheet - Page 5

• Manufacturer Part Number: LPC47N227TQFP
• Manufacturer: Standard Microsystems (SMSC)

Specifications of LPC47N227TQFP

• Lead Free Status / RoHS Status: Not Compliant

TQFP/STQFP
23:20
PIN #
24
25
26
27
28
29
30
17
1
2
3
4
5
LPC Address/
Data bus 3-0
LPC Frame
LPC
DMA/Bus Master
Request
PCI RESET
LPC Power Down
(Note 2)
PCI Clock
Controller
PCI Clock
Serial IRQ
Power Mgt. Event
(Note 7)
Drive Density 0
Drive Density 1
Motor On 0
Disk Change
Drive Select 0
NAME
LAD[3:0]
nLFRAME
nLDRQ
nPCI_RESE
T
nLPCPD
nCLKRUN
PCI_CLK
SER_IRQ
nIO_PME
DRVDEN0
DRVDEN1
nMTR0
nDSKCHG
nDS0
DESCRIPTION OF PIN FUNCTIONS
SYMBOL
FLOPPY DISK INTERFACE
LPC INTERFACE
FUNCTION
(O12/OD12)
(O12/OD12)
(O12/OD12)
(O12/OD12)
(O12/OD12)
TYPE PER
PCI_CLK
BUFFER
PCI_OD
PCI_IO
PCI_IO
PCI_O
PCI_I
PCI_I
PCI_I
IS
5
1
multiplexed command, address and data
bus.
cycle and termination of broken cycle.
Active low signal used for encoded
DMA/Bus Master request for the LPC
interface.
Reset.
that the LPC47N227 should prepare for
power to be shut on the LPC interface.
clock status and to request that a
stopped clock be started.
PCI clock input.
Serial IRQ pin used with the PCI_CLK
pin to transfer LPC47N227 interrupts to
the host.
This active low Power Management Event
signal allows the LPC47N227 to request
wakeup.
Indicates the drive and media selected.
Refer to configuration registers CR03,
CR0B, CR1F.
Indicates the drive and media selected.
Refer to configuration registers CR03,
CR0B, CR1F.
drive 0.
open or that the diskette has possibly
been changed since the last drive
selection. This input is inverted and read
via bit 7 of I/O address 3F7H. The
nDSKCHG bit also depends upon the
state of the Force Disk Change bits in the
Force FDD Status Change configuration
register (see subsection CR17 in the
Configuration section).
Active
Active low signal indicates start of new
Active low signal used as LPC Interface
Active low Power Down signal indicates
This signal is used to indicate the PCI
These active low output selects motor
This input senses that the drive door is
Active low output selects drive 0.
high
DESCRIPTION
LPC
signals
used
for