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M451
May. 4, 2018
Page
638
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1006
Rev.2.08
M4
51
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UART Alternate Control/Status Register (UART_ALTCTL)
Register
Offset
R/W
Description
Reset Value
UART_ALTCTL
x=0,1,2,3
U0x2C R/W
UART Alternate Control/Status Register
0x0000_000C
31
30
29
28
27
26
25
24
ADDRMV
23
22
21
20
19
18
17
16
Reserved
ABRDBITS
ABRDEN
ABRIF
Reserved
15
14
13
12
11
10
9
8
ADDRDEN
Reserved
RS485AUD
RS485AAD
RS485NMM
7
6
5
4
3
2
1
0
LINTXEN
LINRXEN
Reserved
BRKFL
Bits
Description
[31:24]
ADDRMV
Address Match Value
This field contains the RS-485 address match values.
Note:
This field is used for RS-485 auto address detection mode.
[23:21]
Reserved
Reserved.
[20:19]
ABRDBITS
Auto-baud Rate Detect Bit Length
00 = 1-bit time from Start bit to the 1st rising edge. The input pattern shall be 0x01.
01 = 2-bit time from Start bit to the 1st rising edge. The input pattern shall be 0x02.
10 = 4-bit time from Start bit to the 1st rising edge. The input pattern shall be 0x08.
11 = 8-bit time from Start bit to the 1st rising edge. The input pattern shall be 0x80.
Note :
The calculation of bit number includes the START bit.
[18]
ABRDEN
Auto-baud Rate Detect Enable Bit
0 = Auto-baud rate detect function Disabled.
1 = Auto-baud rate detect function Enabled.
This bit is cleared automatically after auto-baud detection is finished.
[17]
ABRIF
Auto-baud Rate Interrupt Flag (Read Only)
This bit is set when auto-baud rate detection function finished or the auto-baud rate
counter was overflow and if ABRIEN(UART_INTEN [18]) is set then the auto-baud rate
interrupt will be generated.
Note:
This bit is read only, but it can be cleared by wri
ting “1” to ABRDTOIF
(UART_FIFOSTS[2]) and ABRDIF(UART_FIFOSTS[1]).
[16]
Reserved
Reserved.
[15]
ADDRDEN
RS-485 Address Detection Enable Bit
This bit is used to enable RS-485 Address Detection mode.
0 = Address detection mode Disabled.
1 = Address detection mode Enabled.
Note:
This bit is used for RS-485 any operation mode.
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...