IMP16C552-CJ68 IMP Inc, IMP16C552-CJ68 Datasheet - Page 16

• Manufacturer Part Number: IMP16C552-CJ68
• Description: Dual Universal Asynchronous Receiver/Transmitter (UART) with 16-BYTE FIFO & Parallel Printer Port
• Manufacturer: IMP Inc

16
TABLE VI- interrupt Control Functions
Interrupt Identification
Bit3
0
0
0
1
0
0
(*) This interrupt type is not available in character mode of IMP6C552.
Register
Bit2
0
1
1
1
0
0
Bit1
1
1
0
0
1
0
Bit
0
1
0
0
0
0
0
Priority
level
.—
Highest
second
Second
Third
Fourth
408-432-9100/www.impweb.com
Interrupt
type
None
Receiver
Line Status
Received
Data
Available
Character
Timeout
Identification
(‘’)
Transmitter
Holding
Register
Empty
MODEM
Status
Interrupt Set Reset Functions
Interrupt source
None
Overrun error
or party error
or framing
or break interrupt
Receiver Data
Available
or Trigger Level
Reached
No characters
have been input to
or removed from
the RCVR FIFO
during the Last 4
character times,
and there is at
least one
character in it
during this time.
Transmitter
Holding
Register
Empty
Clear to send or
Data Set ready or
Ring Indicator or
Received Line
Signal Detect
IMP16C552
IMP16C552
Interrupt reset
control
.---
Reading the
Line Status
Register
Reading the
Receiver Buffer
Register or the
FIFO Drops below
the Trigger Level
Reading the
Receiver Buffer
Register
Reading the IIR
Register (if source
of interrupt) or
Writing into the
Transmitter
Holding Register
Reading the
MODEM status
Register
© 2002 IMP, Inc.