FDC37B727-NS SMSC, FDC37B727-NS Datasheet - Page 79
FDC37B727-NS
Manufacturer Part Number
FDC37B727-NS
Description
IC CTRLR SUPER I/O ENH 128-QFP
Manufacturer
SMSC
Datasheet
1.FDC37B727-NS.pdf
(238 pages)
Specifications of FDC37B727-NS
Controller Type
I/O Controller
Interface
ISA Host
Voltage - Supply
4.5 V ~ 5.5 V
Current - Supply
30mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Surface Mount
Package / Case
128-QFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Other names
638-1005
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
FDC37B727-NS
Manufacturer:
Standard
Quantity:
99
Company:
Part Number:
FDC37B727-NS
Manufacturer:
Microchip Technology
Quantity:
10 000
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FIFO POLLED MODE OPERATION
With FCR bit 0 = "1" resetting IER bits 0, 1, 2 or 3
or all to zero puts the UART in the FIFO Polled
Mode of operation.
XMITTER are controlled separately, either one or
both can be in the polled mode of operation. In this
mode, the user's program will check RCVR and
XMITTER status via the LSR. LSR definitions for
the FIFO Polled Mode are as follows:
-
-
Bit 0=1 as long as there is one byte in the
RCVR FIFO.
Bits 1 to 4 specify which error(s) have
Since the RCVR and
79
-
-
-
There is no trigger level reached or timeout
condition indicated in the FIFO Polled Mode,
however, the RCVR and XMIT FIFOs are still fully
capable of holding characters.
occurred. Character error status is handled
the same way as when in the interrupt
mode, the IIR is not affected since EIR bit
2=0.
Bit 5 indicates when the XMIT FIFO is empty.
Bit 6 indicates that both the XMIT FIFO and
shift register are empty.
Bit 7 indicates whether there are any errors in
the RCVR FIFO.
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