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UM10503
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© NXP B.V. 2015. All rights reserved.
User manual
Rev. 2.1 — 10 December 2015
1302 of 1441
NXP Semiconductors
UM10503
Chapter 46: LPC43xx/LPC43Sxx I2C-bus interface
Table 1101.Master Transmitter mode
Status
Code
(STAT)
Status of the I
2
C-bus
and hardware
Application software response
Next action taken by I
2
C hardware
To/From DAT
To CON
STA STO SI
AA
0x08
A START condition
has been transmitted.
Load SLA+W;
clear STA
X
0
0
X
SLA+W will be transmitted; ACK bit will
be received.
0x10
A Repeated START
condition has been
transmitted.
Load SLA+W or
X
0
0
X
As above.
Load SLA+R;
Clear STA
X
0
0
X
SLA+R will be transmitted; the I
2
C block
will be switched to MST/REC mode.
0x18
SLA+W has been
transmitted; ACK has
been received.
Load data byte or
0
0
0
X
Data byte will be transmitted; ACK bit will
be received.
No DAT action or
1
0
0
X
Repeated START will be transmitted.
No DAT action or
0
1
0
X
STOP condition will be transmitted; STO
flag will be reset.
No DAT action
1
1
0
X
STOP condition followed by a START
condition will be transmitted; STO flag will
be reset.
0x20
SLA+W has been
transmitted; NOT ACK
has been received.
Load data byte or
0
0
0
X
Data byte will be transmitted; ACK bit will
be received.
No DAT action or
1
0
0
X
Repeated START will be transmitted.
No DAT action or
0
1
0
X
STOP condition will be transmitted; STO
flag will be reset.
No DAT action
1
1
0
X
STOP condition followed by a START
condition will be transmitted; STO flag will
be reset.
0x28
Data byte in DAT has
been transmitted;
ACK has been
received.
Load data byte or
0
0
0
X
Data byte will be transmitted; ACK bit will
be received.
No DAT action or
1
0
0
X
Repeated START will be transmitted.
No DAT action or
0
1
0
X
STOP condition will be transmitted; STO
flag will be reset.
No DAT action
1
1
0
X
STOP condition followed by a START
condition will be transmitted; STO flag will
be reset.
0x30
Data byte in DAT has
been transmitted;
NOT ACK has been
received.
Load data byte or
0
0
0
X
Data byte will be transmitted; ACK bit will
be received.
No DAT action or
1
0
0
X
Repeated START will be transmitted.
No DAT action or
0
1
0
X
STOP condition will be transmitted; STO
flag will be reset.
No DAT action
1
1
0
X
STOP condition followed by a START
condition will be transmitted; STO flag will
be reset.
0x38
Arbitration lost in
SLA+R/W or Data
bytes.
No DAT action or
0
0
0
X
I
2
C-bus will be released; not addressed
slave will be entered.
No DAT action
1
0
0
X
A START condition will be transmitted
when the bus becomes free.