User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 712 of 909 2019 Ambiq Micro, Inc.
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INSTANCE 1 ADDRESS: 0x4001D004
UART Status Register
17.6.2.3 FR Register
Flag Register
OFFSET: 0x00000018
INSTANCE 0 ADDRESS: 0x4001C018
INSTANCE 1 ADDRESS: 0x4001D018
Flag Register
Table 1039: RSR 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
OESTAT
BESTAT PESTAT
FESTAT
Table 1040: RSR Register Bits
Bit Name Reset RW Description
31:4 RSVD 0x0 RO
This bitfield is reserved for future use.
3 OESTAT 0x0 RW
This is the overrun error indicator.
NOERR = 0x0 - No error on UART OESTAT, overrun error indicator.
ERR = 0x1 - Error on UART OESTAT, overrun error indicator.
2 BESTAT 0x0 RW
This is the break error indicator.
NOERR = 0x0 - No error on UART BESTAT, break error indicator.
ERR = 0x1 - Error on UART BESTAT, break error indicator.
1 PESTAT 0x0 RW
This is the parity error indicator.
NOERR = 0x0 - No error on UART PESTAT, parity error indicator.
ERR = 0x1 - Error on UART PESTAT, parity error indicator.
0FESTAT 0x0RW
This is the framing error indicator.
NOERR = 0x0 - No error on UART FESTAT, framing error indicator.
ERR = 0x1 - Error on UART FESTAT, framing error indicator.