FDC37M81 SMSC [SMSC Corporation], FDC37M81 Datasheet - Page 71

• Manufacturer Part Number: FDC37M81
• Description: PC98/99 Compliant Enhanced Super I/O Controller with Keyboard/Mouse Wake-Up
• Manufacturer: SMSC [SMSC Corporation]

MODE
ONLY
BIT 3
FIFO
0
0
0
1
0
0
BIT 2 BIT 1 BIT 0
IDENTIFICATION
0
1
1
1
0
0
INTERRUPT
REGISTER
0
1
0
0
1
0
1
0
0
0
0
0
Highest
Second
Second
Third
Fourth
PRIORITY
LEVEL
Table 30 - Interrupt Control
-
INTERRUPT SET AND RESET FUNCTIONS
None
Receiver Line
Status
Received
Data
Available
Character
Timeout
Indication
Transmitter
Holding
Register
Empty
MODEM
Status
INTERRUPT
71
TYPE
None
Overrun Error,
Parity Error,
Framing Error or
Break Interrupt
Receiver Data
Available
No Characters
Have Been
Removed From
or Input to the
RCVR FIFO
during the last 4
Char times and
there is at least 1
char in it during
this time
Transmitter
Holding Register
Empty
Clear to Send or
Data Set Ready
or Ring Indicator
or Data Carrier
Detect
INTERRUPT
SOURCE
Reading the Line
Status Register
Read Receiver Buffer
or the FIFO drops
below the trigger level.
Reading the Receiver
Buffer Register
Reading the IIR
Register (if Source of
Interrupt) or Writing
the Transmitter
Holding Register
Reading the MODEM
Status Register
INTERRUPT RESET
CONTROL
-