MEC1404 Datasheet, PDF (284/572 Pages) Microchip Technology – Keyboard and Embedded Controller Products for Notebook PC

MEC140X/1X
TABLE 17-8: INTERRUPT CONTROL TABLE
FIFO
Mode
Only
Interrupt
Identification Register
Interrupt SET and RESET Functions
Bit 3
0
1
0
Bit 2 Bit 1 Bit 0
0
0
1
1
1
0
0
0
1
0
0
Priority
Level
-
Highest
Second
Third
Fourth
Interrupt Type
None
Receiver Line
Status
Received Data
Available
Character Time-
out Indication
Transmitter Hold-
ing Register
Empty
MODEM Status
Interrupt Source
Interrupt Reset
Control
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 Hold-
ing Register
Empty
Clear to Send or
Data Set Ready
or Ring Indicator
or Data Carrier
Detect
-
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 Inter-
rupt) or Writing
the Transmitter
Holding Register
Reading the
MODEM Status
Register
DS00001956D-page 284
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