Ver 1.3
PRELIMINARY
EAGLE
3.19.4 UART Channel 0~3 Interrupt Enable Register (UIE0 ~ UIE3)
Address : FFE0 8004h / FFE0 8024h / FFE0 8044h / FFE0 8064h
Bit
31: 3
2
R/W
R
R/W
Description
Default Value
Reserved.
-
0b
Enable Receiver Line Status Interrupt(ERLSI)
0 : Disable
1 : Enable
1
0
R/W
R/W
Enable Transmitter Holding Register Empty Interrupt(ETHREI)
0 : Disable
1 : Enable
0b
0b
Enable Received Data Available Interrupt(ERDAI)
0 : Disable
1 : Enable
3.19.5 UART Channel 0~3 Interrupt Identification Register (UII0 ~ UII3)
Address : FFE0 8008h / FFE0 8028h / FFE0 8048h / FFE0 8068h
Bit
31 : 8
7 : 6
5 : 4
3 : 1
0
R/W
R
R
R
R
Description
Default Value
Reserved.
-
00b
-
000b
1b
FIFO Enabled : Always zero if not in FIFO mode
Reserved
Interrupt ID ( Note Table 3, Interrupt Control Function)
Interrupt Pending : When this bit is a logic 1, no interrupt is pending
R
Interrupt
Identification Register
Priority
Level
Interrupt
Type
Interrupt Reset
Condition
Interrupt Source
Bit 3 Bit 2 Bit 1 Bit 0
0
0
0
1
-
None
Receiver
Highest Line
Status
Received
Second Data
None
-
Overrun Error or Parity Error
Framing Error or Break
Interrupt
Reading the Line Status
Register
0
1
1
0
Reading the Receiver
Buffer Register or the FIFO
Drops Below the Trigger
Level
Receiver Data Available or
Trigger Level Reached
0
1
0
1
1
0
0
0
1
0
0
0
Available
No Characters have been
removed from or input to the
RCVR FIFO during the last 4 Reading the Receiver
Char. times, and there is at
least 1 Char. in it during this
Time
Character
Second Timeout
Indication
Buffer Register
Transmitter
Holding
Register
Empty
Reading the IIR Register
(if source of interrupt) or
Writing into the Transmitter
Holding Register
Transmitter Holding
Register Empty
Third
Table 3-24 UART Interrupt Control Function
161
CONFIDENTIAL
Beijing Peak Microtech Co.Ltd.
ETC [ ETC ]
