NXP Semiconductors LPC24XX UM10237 - Manual (Page 595)

UM10237_4 © NXP B.V. 2009. All rights reserved.
User manual Rev. 04 — 26 August 2009 595 of 792
NXP Semiconductors
UM10237
Chapter 22: LPC24XX I 2 C interfaces I 2 C0/1/2
Table 526. Master Receiver mode
Status
Code
(I2CSTAT) 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.