NXP Semiconductors LPC1768 - Page 459

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User manual Rev. 3 — 19 December 2013 459 of 841
NXP Semiconductors
UM10360
Chapter 19: LPC176x/5x I2C0/1/2
Table 399. Master Receiver mode
I2CSTAT
Status
Code
Status of the
I
2
C-bus and
hardware
Application software response Next action taken by I
2
C hardware
To/From I2DAT To I2CON
STA STO SI AA
0x08 A START condition
has been transmitted.
Load SLA+R X 0 0 X SLA+R will be transmitted; ACK bit will be
received.
0x10 A repeated START
condition has been
transmitted.
Load SLA+R or X 0 0 X As above.
Load SLA+W X 0 0 X SLA+W will be transmitted; the I
2
C block
will be switched to MST/TRX mode.
0x38 Arbitration lost in
NOT ACK bit.
No I2DAT action or 0 0 0 X I
2
C-bus will be released; the I
2
C block will
enter a slave mode.
No I2DAT action 1 0 0 X A START condition will be transmitted
when the bus becomes free.
0x40 SLA+R has been
transmitted; ACK has
been received.
No I2DAT action or 0 0 0 0 Data byte will be received; NOT ACK bit
will be returned.
No I2DAT action 0 0 0 1 Data byte will be received; ACK bit will be
returned.
0x48 SLA+R has been
transmitted; NOT
ACK has been
received.
No I2DAT action or 1 0 0 X Repeated START condition will be
transmitted.
No I2DAT action or 0 1 0 X STOP condition will be transmitted; STO
flag will be reset.
No I2DAT action 1 1 0 X STOP condition followed by a START
condition will be transmitted; STO flag will
be reset.
0x50 Data byte has been
received; ACK has
been returned.
Read data byte or 0 0 0 0 Data byte will be received; NOT ACK bit
will be returned.
Read data byte 0 0 0 1 Data byte will be received; ACK bit will be
returned.
0x58 Data byte has been
received; NOT ACK
has been returned.
Read data byte or 1 0 0 X Repeated START condition will be
transmitted.
Read data byte or 0 1 0 X STOP condition will be transmitted; STO
flag will be reset.
Read data byte 1 1 0 X STOP condition followed by a START
condition will be transmitted; STO flag will
be reset.