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UART
Flash
MCU(HMS39C7092)
132
Table
9.5
Interrupt
Control
Functions
FIFO
Mode
Only
Interrupt
Identification
Register
Interrupt
Set
and
Reset
Functions
Priority
Level
Bit
3
Bit
2
Bit
1
Bit
0
Interrupt
Type
Interrupt
Source
Interrupt
Reset
Control
-
0
0
0
1
None
None
-
Highest
0
1
1
0
Receiver
Line
Status
Overrun
Error,
Parity
Error,
Framing
Error
or
Break
Interrupt
Reading
the
Line
Status
Register
Second
0
1
0
0
Receiver
Data
Available
Receiver
Data
Available
or
Trigger
Level
Reached
Reading
the
Receiver
Buffer
Register
or
the
FIFO
drops
below
the
trigger
level
Second
1
1
0
0
Character
Time-out
Indication
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
Reading
the
Receiver
Buffer
Register
Third
0
0
1
0
Transmitter
Holding
Register
Empty
Transmitter
Holding
Register
Empty
Reading
the
IIR
Register
(if
it
is
the
source
of
interrupt)
or
writing
it
into
the
Transmitter
Holding
Register
Fourth
0
0
0
0
MODEM
Status
Clear
to
Send,
Data
Set
Ready,
Ring
Indicator,
or
Data
Carrier
Detect
Reading
the
MODEM
Status
Register
IEN
Interrupt
Enable
Register
(0x1404
R/W)
b31
b8
b7
b6
b5
b4
b3
b2
b1
b0
IEN
Reserved
Res
RLSIE
THREIE
DRIE
Reset
-
0
0
0
0
0
0
0
0
Initial
value
:
0xXXXXXX00
DRIE
0:
No
data
received
1:
Received
Data
Ready
THREIE
0:
No
overrun
error
1:
Overrun
Error
RLSIE
0:
No
parity
error
1:
Parity
Error
This
register
enables
the
five
types
of
UART
interrupts.
Each
interrupt
can
individually
activate
the
interrupt
output
signal.
It
is
possible
to
totally
disable
the
interrupt
Enable
Register
(IER).
Similarly,
setting
bits
of
the
IER
register
to
ë1í
enable
the
selected
interrupt(s).
Disabling
an
interrupt
prevents
it
from
being
indicated
as
active
in
the
IIR
and
from
activating
the
UART
interrupt
output
signal.
All
other
system
functions
operate
in
their
normal
manners,
including
the
setting
of
the
Line
Status
Registers.
Table
9.6
the
Summary
of
Registers
shows
the
contents
of
the
IER.
Details
on
each
bit
are
:
DRIE
This
bit
enables
the
Received
Data
Available
Interrupt
(and
time-out
interrupts
in
the
FIFO
mode)
when
it
is
set
to
ë1í.
THREIE
This
bit
enables
the
Transmitter
Holding
Register
Empty
Interrupt
when
set
Summary of Contents for HMS39C7092
Page 1: ...HMS39C7092 32Bit Embedded Flash MCU User s Manual Version 1 2...
Page 11: ...Flash MCU HMS39C7092 11...
Page 12: ...Flash MCU HMS39C7092 12...
Page 13: ...Flash MCU HMS39C7092 Introduction 13 Chapter 1 Introduction...
Page 27: ...Flash MCU HMS39C7092 ARM7TDMI Core 27 Chapter 2 ARM7TDMI Core...
Page 40: ...BUS Controller Flash MCU HMS39C7092 40...
Page 41: ...Flash MCU HMS39C7092 BUS Controller 41 Chapter 3 BUS Controller...
Page 59: ...Flash MCU HMS39C7092 MCU controller 59 Chapter 4 MCU Controller...
Page 67: ...Flash MCU HMS39C7092 Power Management Unit 67 Chapter 5 Power Management Unit...
Page 77: ...Flash MCU HMS39C7092 Interrupt controller 77 Chapter 6 The Interrupt Controller...
Page 85: ...Flash MCU HMS39C7092 Watchdog Timer 85 Chapter 7 Watchdog Timer...
Page 98: ...Watchdog Timer Flash MCU HMS39C7092 98...
Page 99: ...Flash MCU HMS39C7092 General Purpose Timer 99 Chapter 8 The General Purpose Timer...
Page 118: ...General Purpose Timer Flash MCU HMS39C7092 118...
Page 119: ...Flash MCU HMS39C7092 UART 119 Chapter 9 UART Universal Asynchronous Receiver Transmitter...
Page 137: ...Flash MCU HMS39C7092 GPIO 137 Chapter 10 GPIO General Purpose Input Output...
Page 142: ...GPIO Flash MCU HMS39C7092 142...
Page 143: ...Flash MCU HMS39C7092 On Chip SRAM 143 Chapter 11 On Chip SRAM...
Page 145: ...Flash MCU HMS39C7092 On chip Flash memory 145 Chapter 12 On chip Flash Memory...
Page 173: ...Flash MCU HMS39C7092 A D Converter 173 Chapter 13 A D Converter...
Page 185: ...Flash MCU HMS39C7092 Electrical Characteristics 185...
Page 186: ...Electrical Characteristics Flash MCU HMS39C7092 186 Chapter 14 Electrical Characteristics...
Page 195: ...Flash MCU HMS39C7092 Electrical Characteristics 195...
Page 196: ...Electrical Characteristics Flash MCU HMS39C7092 196...
Page 197: ...A 1 Flash MCU HMS39C7092 197 A 1 Package Dimension...