NXP Semiconductors LPC1768 - Detailed State Tables

UM10360 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2013. All rights reserved.
User manual Rev. 3 — 19 December 2013 458 of 841
NXP Semiconductors
UM10360
Chapter 19: LPC176x/5x I2C0/1/2
19.9.5 Detailed state tables
The following tables show detailed state information for the four I
2
C operating modes.
Table 398. Master Transmitter 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+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+W 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 I2DAT action or 1 0 0 X Repeated START 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.
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 I2DAT action or 1 0 0 X Repeated START 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.
0x28 Data byte in I2DAT
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 I2DAT action or 1 0 0 X Repeated START 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.
0x30 Data byte in I2DAT
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 I2DAT action or 1 0 0 X Repeated START 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.
0x38 Arbitration lost in
SLA+R/W or Data
bytes.
No I2DAT action or 0 0 0 X I
2
C-bus will be released; not addressed
slave will be entered.
No I2DAT action 1 0 0 X A START condition will be transmitted
when the bus becomes free.