FDC37C669-MT SMSC, FDC37C669-MT Datasheet - Page 81

• Manufacturer Part Number: FDC37C669-MT
• Description: IC CTRLR SUPER I/O FLPPY 100TQFP
• Manufacturer: SMSC

Specifications of FDC37C669-MT

• Controller Type: I/O Controller
• Interface: ISA Host
• Voltage - Supply: 4.5 V ~ 5.5 V
• Current - Supply: 25mA
• Operating Temperature: 0°C ~ 70°C
• Mounting Type: Surface Mount
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 638-1008

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:
-
-
BAUD RATE
Bit 0=1 as long as there is one byte in the RCVR
FIFO.
Bits 1 to 4 specify which error(s) have occurred.
Character error status is handled the same way as
when in the interrupt
DESIRED
115200
230400
460800
19200
38400
57600
134.5
1200
1800
2000
2400
3600
4800
7200
9600
110
150
300
600
50
75
GENERATE 16X CLOCK
Table 33 - Baud Rates Using 1.8462 MHz Clock (24 MHz/13)
DIVISOR USED TO
32770
32769
2307
1538
1049
858
769
384
192
96
64
58
48
32
24
16
12
6
3
2
1
BETWEEN DESIRED AND ACTUAL*
PERCENT ERROR DIFFERENCE
81
-
-
-
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.
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.
0.005
0.03
0.03
0.01
0.03
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.16
0.5
1.6
BIT 7 OR 6
CROC:
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
1
1