User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 234 of 909 2019 Ambiq Micro, Inc.
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7.10.2.6 RXFIFO Register
RX Data FIFO
OFFSET: 0x00000014
INSTANCE 0 ADDRESS: 0x50014014
RX Data FIFO
7.10.2.7 TXENTRIES Register
TX FIFO Entries
OFFSET: 0x00000018
INSTANCE 0 ADDRESS: 0x50014018
Number of words in TX FIFO
Table 338: RXFIFO 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
RXFIFO
Table 339: RXFIFO Register Bits
Bit Name Reset RW Description
31:0 RXFIFO 0x0 RO
Receive data. Data is aligned to the LSB (padded zeros on upper bits)
unless BIGENDIAN is set.
Table 340: TXENTRIES 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 TXENTRIES
Table 341: TXENTRIES Register Bits
Bit Name Reset RW Description
31:5 RSVD 0x0 RO
RESERVED
4:0 TXENTRIES 0x0 RO
Number of 32-bit words/entries in TX FIFO