Panasonic MN103001G/F01K User Manual
Page 216
Interrupt Controller
9-28
Interrupt accepted group register
Register symbol: IAGR
Address:
x'34000200
Purpose:
This register is used to read the group number that generated the interrupt request.
Bit No.
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit
-
-
-
-
-
-
-
-
-
GN4 GN3 GN2
GN1 GN0
-
-
name
Reset
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
Access
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
R
Bit No.
Bit name
Description
6 to 2
GN4 to 0
Group number register
The group number that was accepted is stored in GN 4 to 0.
During a register read, this register returns the smallest group number of the groups that are generating an interrupt
of the interrupt levels indicated by IM2 to 0 the PSW.
Because when an interrupt generated, the interrupt levels accepted by the CPU are set in IM2 to 0, this register
returns a group number that is generating an interrupt level accepted by the CPU. However, if IM2 to 0 are
changed, if the interrupt control register is manipulated, or if a new interrupt factor is generated, the value that this
register returns may change even while interrupt processing is in progress.
The interrupt accepted group register IAGR is a read-only register; it cannot be written.