User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 347 of 909 2019 Ambiq Micro, Inc.
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9.13.2.12INTSTAT Register
IO Slave Interrupts: Status
OFFSET: 0x00000204
INSTANCE 0 ADDRESS: 0x50000204
Read bits from this register to discover the cause of a recent interrupt.
5IOINTW 0x0RW
IO Write interrupt.
4GENAD 0x0RW
I2C General Address interrupt.
3 FRDERR 0x0 RW
FIFO Read Error interrupt.
2 FUNDFL 0x0 RW
FIFO Underflow interrupt.
1FOVFL 0x0RW
FIFO Overflow interrupt.
0FSIZE 0x0RW
FIFO Size interrupt.
Table 493: INTSTAT Register
3
1
3
0
2
9
2
8
2
7
2
6
2
5
2
4
2
3
2
2
2
1
2
0
1
9
1
8
1
7
1
6
1
5
1
4
1
3
1
2
1
1
1
0
0
9
0
8
0
7
0
6
0
5
0
4
0
3
0
2
0
1
0
0
RSVD
XCMPWR
XCMPWF
XCMPRR
XCMPRF
IOINTW
GENAD
FRDERR
FUNDFL
FOVFL
FSIZE
Table 494: INTSTAT Register Bits
Bit Name Reset RW Description
31:10 RSVD 0x0 RO
RESERVED
9XCMPWR 0x0RW
Transfer complete interrupt, write to register space.
8XCMPWF 0x0RW
Transfer complete interrupt, write to FIFO space.
7XCMPRR 0x0RW
Transfer complete interrupt, read from register space.
6XCMPRF 0x0RW
Transfer complete interrupt, read from FIFO space.
5IOINTW 0x0RW
IO Write interrupt.
Table 492: INTEN Register Bits
Bit Name Reset RW Description