Philips LPC2101 - Page 140

© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
User manual Rev. 01 — 12 January 2006 140
Philips Semiconductors
UM10161
Volume 1
Chapter 11: I
2
C interfaces
Table 133: Master Transmitter 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+W 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 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.