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M451
May. 4, 2018
Page
628
of
1006
Rev.2.08
M4
51
S
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NICA
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NU
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UART FIFO Status Register (UART_FIFOSTS)
Register
Offset
R/W
Description
Reset Value
UART_FIFOSTS
x=0,1,2,3
U0x18
R/W
UART FIFO Status Register
0x1040_4000
31
30
29
28
27
26
25
24
Reserved
TXEMPTYF
Reserved
TXOVIF
23
22
21
20
19
18
17
16
TXFULL
TXEMPTY
TXPTR
15
14
13
12
11
10
9
8
RXFULL
RXEMPTY
RXPTR
7
6
5
4
3
2
1
0
Reserved
BIF
FEF
PEF
ADDRDETF
ABRDTOIF
ABRDIF
RXOVIF
Bits
Description
[31:29]
Reserved
Reserved.
[28]
TXEMPTYF
Transmitter Empty Flag (Read Only)
This bit is set by hardware when TX FIFO (UART_DAT) is empty and the STOP bit of the
last byte has been transmitted.
0 = TX FIFO is not empty or the STOP bit of the last byte has been not transmitted.
1 = TX FIFO is empty and the STOP bit of the last byte has been transmitted.
Note:
This bit is cleared automatically when TX FIFO is not empty or the last byte
transmission has not completed.
[27:25]
Reserved
Reserved.
[24]
TXOVIF
TX Overflow Error Interrupt Flag (Read Only)
If TX FIFO (UART_DAT) is full, an additional write to UART_DAT will cause this bit to
logic 1.
0 = TX FIFO is not overflow.
1 = TX FIFO is overflow.
Note:
This bit is read only, but can be cleared by writing “1” to it.
[23]
TXFULL
Transmitter FIFO Full (Read Only)
This bit indicates TX FIFO full or not.
0 = TX FIFO is not full.
1 = TX FIFO is full.
Note:
This bit is set when the number of usage in TX FIFO Buffer is equal to 16,
otherwise is cleared by hardware.
[22]
TXEMPTY
Transmitter FIFO Empty (Read Only)
This bit indicates TX FIFO empty or not.
0 = TX FIFO is not empty.
1 = TX FIFO is empty.
Note:
When the last byte of TX FIFO has been transferred to Transmitter Shift Register,
hardware sets this bit high. It will be cleared when writing data into DAT (TX FIFO not
empty).
Содержание ARM Cortex NuMicro M451 Series
Страница 301: ...M451 May 4 2018 Page 301 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL...
Страница 324: ...M451 May 4 2018 Page 324 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL Figure 6 4 18 Checksum Calculation Flow...
Страница 355: ...M451 May 4 2018 Page 355 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL 2 0 Reserved Reserved...
Страница 625: ...M451 May 4 2018 Page 625 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL 00 5 bits 01 6 bits 10 7 bits 11 8 bits...
Страница 721: ...M451 May 4 2018 Page 721 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL the SCL line 1 0 Reserved Reserved...
Страница 1001: ...M451 May 4 2018 Page 1001 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 64L 10x10x1 4 mm footprint 2 0 mm 9 2...
Страница 1002: ...M451 May 4 2018 Page 1002 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 64L 7x7x1 4 mm footprint 2 0 mm 9 3...
Страница 1003: ...M451 May 4 2018 Page 1003 of 1006 Rev 2 08 M451 SERIES TECHNICAL REFERENCE MANUAL LQFP 48L 7x7x1 4mm footprint 2 0mm 9 4...