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Chapter 25 External Interrupt
4.Registers
4.2 EIRR: Interrupt Request Register
Status bit of a request of an external interrupt.
• EIRR0 (INT0-INT7): Address 030H (access: Byte, Half-word, Word)
7
6
ER7
ER6
0
0
R (RM1), W R (RM1), W R (RM1), W R (RM1), W R (RM1), W R (RM1), W
(About attributes, see
• EIRR1 (INT8-INT15): Address 034H (access: Byte, Half-word, Word)
7
6
ER15
ER14
0
0
R (RM1), W
R (RM1), W R (RM1), W R (RM1), W R (RM1), W R (RM1), W
(About attributes, see
An external interrupt request bit (ERn) indicates the corresponding external interrupt request.
ERn
0
No external interrupt request present
1
External interrupt request present
Note: n = 0 to 15
4.3 ENIR: Interrupt Request Enable Register
Enable bit of external interrupt requests.
• ENIR0 (INT0-INT7): Address 031H (access: Byte, Half-word, Word)
7
6
EN7
EN6
0
0
R/W
R/W
(About attributes, see
• ENIR1 (INT8-INT15): Address 035H (access: Byte, Half-word, Word)
7
6
EN15
EN14
0
0
R/W
R/W
(About attributes, see
An external interrupt request enable bit (ENn) enables the corresponding external interrupt request.
ERn
0
External interrupt request output disable
1
External interrupt request output enable
Note: n = 0 to 15
326
5
4
ER5
ER4
0
0
"Meaning of Bit Attribute Symbols (Page
5
4
ER13
ER12
0
0
"Meaning of Bit Attribute Symbols (Page
Read value
5
4
3
EN5
EN4
EN3
0
0
0
R/W
R/W
R/W
"Meaning of Bit Attribute Symbols (Page
5
4
3
EN13
EN12
EN11
0
0
0
R/W
R/W
R/W
"Meaning of Bit Attribute Symbols (Page
3
2
ER3
ER2
ER1
0
0
R (RM1), W
No.10)".)
3
2
ER11
ER10
0
0
R (RM1), W R (RM1), W
No.10)".)
Description
Clear external interrupt factor bits
No effect on operation
2
1
EN2
EN1
0
0
R/W
R/W
No.10)".)
2
1
EN10
EN9
0
0
R/W
R/W
No.10)".)
Description
1
0
ER0
0
0
Initial value
R (RM1), W
Attribute
1
0
ER9
ER8
0
0
Initial value
Attribute
Write value
0
Bit
EN0
0
Initial value
R/W
Attribute
0
Bit
EN8
0
Initial value
R/W
Attribute
Bit
Bit
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