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7540 Group User
’
s Manual
3-118
APPENDIX
3.5 List of registers
Fig. 3.5.36 Structure of Interrupt request register 2
Fig. 3.5.35 Structure of Interrupt request register 1
Interrupt request register 1
b7 b6 b5 b4 b3 b2 b1 b0
B
0
Function
At reset
R W
0
1
2
3
4
5
6
7
Name
0
0
0
0
0
0
0
Interrupt request register 1 (IREQ1) [Address : 3C
16
]
Serial I/O1 receive
interrupt request bit
Serial I/O1 transmit interrupt
request bit
INT
0
interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
CNTR
0
interrupt request bit
CNTR
1
interrupt request bit
:
These bits can be cleared to
“
0
”
by program, but cannot be set to
“
1
”
.
INT
1
interrupt request bit
Key-on wake up interrupt
request bit
Timer X interrupt request bit
Interrupt request register 2
b7 b6 b5 b4 b3 b2 b1 b0
B
0
Function
At reset
R W
0
1
2
3
4
5
6
7
Name
0
0
0
0
0
0
0
Interrupt request register 2 (IREQ2) [Address : 3D
16
]
Nothing is allocated for these bits. These are write disabled bits.
When these bits are read out, the values are
“
0
”
.
Timer Y interrupt request bit
Timer Z interrupt request bit
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
0 : No interrupt request issued
1 : Interrupt request issued
Timer 1 interrupt request bit
:
These bits can be cleared to
“
0
”
by program, but cannot be set to
“
1
”
.
Timer A interrupt request bit
Serial I/O2 interrupt request
bit
AD converter interrupt
request bit