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M451
May. 4, 2018
Page
734
of
1006
Rev.2.08
M4
51
S
E
RI
E
S
T
E
CH
NICA
L RE
F
E
R
E
NC
E
M
A
NU
A
L
I
2
C Bus Management Status Register (I2C_BUSSTS)
Register
Offset
R/W
Description
Reset Value
I2C_BUSSTS
0x4C
R/W
I
2
C Bus Management Status Register
0x0000_0000
31
30
29
28
27
26
25
24
Reserved
23
22
21
20
19
18
17
16
Reserved
15
14
13
12
11
10
9
8
Reserved
7
6
5
4
3
2
1
0
Reserved
CLKTO
BUSTO
SCTLDIN
ALERT
PECERR
BCDONE
BUSY
Bits
Description
[31:6]
Reserved
Reserved.
[6]
CLKTO
Clock Low Cumulate Time-out Status
0 = Indicates that the cumulative clock low is no any time-out.
1 = Indicates that the cumulative clock low time-out occurred.
Note:
Software can write 1 to clear this bit.
[5]
BUSTO
Bus Time-out Status
0 = Indicates that there is no any time-out or external clock time-out.
1 = Indicates that a time-out or external clock time-out occurred.
In bus busy, the bit indicates the total clock low time-out event occurred otherwise, it
indicates the bus idle time-out event occurred.
Note:
Software can write 1 to clear this bit.
[4]
SCTLDIN
Bus Suspend or Control Signal Input Status
0 = The input status of SUSCON pin is 0.
1 = The input status of SUSCON pin is 1.
[3]
ALERT
SMBus Alert Status
Device Mode (BMHEN =0).
0 = Indicates SMALERT pin state is low.
1 = Indicates SMALERT pin state is high.
Host Mode (BMHEN =1).
0 = No SMBALERT event.
1 = Indicates there is SMBALERT event (falling edge) is detected in SMALERT pin when
the BMHEN = 1 (SMBus host configuration) and the ALERTEN = 1.
Note:
1. The SMALERT pin is an open-drain pin, the pull-high resistor is must in the
system. 2. Software can write 1 to clear this bit.
[2]
PECERR
PEC Error in Reception
0 = Indicates the PEC value equal the received PEC data packet.
1 = Indicates the PEC value doesn’t match the receive PEC data packet.
Note:
Software can write 1 to clear this bit.
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...