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© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
User manual Rev. 02 — 23 May 2005 79 of 133
Philips Semiconductors
UM10109
P89LPC932A1 User manual
30h Data byte in I2DAT
has been
transmitted, NOT
ACK has been
received
Load data byte or000xData byte will be transmitted;
ACK bit will be received
no I2DAT action or100xRepeated START will be
transmitted;
no I2DAT action or010xSTOP condition will be
transmitted; STO flag will be
reset
no I2DAT action110xSTOP condition followed by a
START condition will be
transmitted. STO flag will be
reset.
38H Arbitration lost in
SLA+R/W or data
bytes
No I2DAT action
or
000xI
2
C-bus will be released; not
addressed slave will be entered
No I2DAT action 100xA START condition will be
transmitted when the bus
becomes free.
Table 68: Master Transmitter mode
…continued
Status code
(I2STAT)
Status of the I
2
C
hardware
Application software response Next action taken by I
2
C
hardware
to/from I2DAT to I2CON
STA STO SI AA
Table 69: Master Receiver mode
Status code
(I2STAT)
Status of the I
2
C
hardware
Application software response Next action taken by I
2
C hardware
to/from I2DAT to I2CON
STA STO SI STA
08H A START
condition has
been transmitted
Load SLA+R x 0 0 x SLA+R will be transmitted; ACK bit
will be received
10H A repeat START
condition has
been transmitted
Load SLA+R or x 0 0 x As above
Load SLA+W SLA+W will be transmitted; I
2
C-bus
will be switched to Master Transmitter
Mode
38H Arbitration lost in
NOT ACK bit
no I2DAT action or 0 0 0 x I
2
C-bus will be released; it will enter a
slave mode
no I2DAT action 1 0 0 x A START condition will be
transmitted when the bus becomes
free
40h 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 or 0 0 0 1 Data byte will be received; ACK bit
will be returned
48h SLA+R has been
transmitted; NOT
ACK has been
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 or 1 1 0 x STOP condition followed by a START
condition will be transmitted; STO
flag will be reset