User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 340 of 909 2019 Ambiq Micro, Inc.
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9.13.2 IOSLAVE Registers
9.13.2.1 FIFOPTR Register
Current FIFO Pointer
OFFSET: 0x00000100
INSTANCE 0 ADDRESS: 0x50000100
Current FIFO Pointer
9.13.2.2 FIFOCFG Register
FIFO Configuration
OFFSET: 0x00000104
INSTANCE 0 ADDRESS: 0x50000104
FIFO Configuration
Table 471: FIFOPTR 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 FIFOSIZ FIFOPTR
Table 472: FIFOPTR Register Bits
Bit Name Reset RW Description
31:16 RSVD 0x0 RO
RESERVED
15:8 FIFOSIZ 0x0 RW
The number of bytes currently in the hardware FIFO.
7:0 FIFOPTR 0x0 RW
Current FIFO pointer.
Table 473: FIFOCFG 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
ROBASE RSVD
RSVD
FIFOMAX RSVD FIFOBASE