User Manual

Apollo3 Blue Datasheet
DS-A3-0p9p1 Page 711 of 909 2019 Ambiq Micro, Inc.
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17.6.2 UART Registers
17.6.2.1 DR Register
UART Data Register
OFFSET: 0x00000000
INSTANCE 0 ADDRESS: 0x4001C000
INSTANCE 1 ADDRESS: 0x4001D000
UART Data Register
17.6.2.2 RSR Register
UART Status Register
OFFSET: 0x00000004
INSTANCE 0 ADDRESS: 0x4001C004
Table 1037: DR 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
OEDATA
BEDATA PEDATA
FEDATA
DATA
Table 1038: DR Register Bits
Bit Name Reset RW Description
31:12 RSVD 0x0 RO
This bitfield is reserved for future use.
11 OEDATA 0x0 RO
This is the overrun error indicator.
NOERR = 0x0 - No error on UART OEDATA, overrun error indicator.
ERR = 0x1 - Error on UART OEDATA, overrun error indicator.
10 BEDATA 0x0 RO
This is the break error indicator.
NOERR = 0x0 - No error on UART BEDATA, break error indicator.
ERR = 0x1 - Error on UART BEDATA, break error indicator.
9 PEDATA 0x0 RO
This is the parity error indicator.
NOERR = 0x0 - No error on UART PEDATA, parity error indicator.
ERR = 0x1 - Error on UART PEDATA, parity error indicator.
8FEDATA 0x0RO
This is the framing error indicator.
NOERR = 0x0 - No error on UART FEDATA, framing error indicator.
ERR = 0x1 - Error on UART FEDATA, framing error indicator.
7:0 DATA 0x0 RW
This is the UART data port.