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Table 15.5. I C Master Receiver
...the world's most energy friendly microcontrollers
As when operating as a master transmitter, arbitration can be lost as a master receiver. When this
happens the ARBLOST interrupt flag in I2Cn_IF is set, and the master has a possibility of being selected
as a slave given the correct conditions.
2
I2Cn_STATEDescription
I2Cn_IF
Required
Response
interaction
0x57
START transmitted
START interrupt flag
ADDR
ADDR+R will be sent
(BUSHOLD interrupt
flag)
+R ->
TXDATA
STOP
STOP +
START
STOP will be sent and bus released.
STOP will be sent and bus released. Then a
START will be sent when bus becomes idle.
0x57
Repeated START
transmitted
START interrupt
flag(BUSHOLD
ADDR
+R ->
ADDR+R will be sent
interrupt flag)
TXDATA
STOP
STOP +
START
STOP will be sent and bus released.
STOP will be sent and bus released. Then a
START will be sent when bus becomes idle.
-
ADDR+R transmitted
TXBL interrupt flag
None
(TXC interrupt flag)
0x93
ADDR+R transmitted,
ACK interrupt
RXDATA
Start receiving
ACK received
flag(BUSHOLD)
STOP
START
STOP +
START
STOP will be sent and the bus released
Repeated START will be sent
STOP will be sent and the bus released. Then
a START will be sent when the bus becomes
idle
0x9B
ADDR+R
NACK(BUSHOLD)
CONT +
Continue, start receiving
transmitted,NACK
received
RXDATA
STOP
START
STOP +
START
STOP will be sent and the bus released
Repeated START will be sent
STOP will be sent and the bus released. Then
a START will be sent when the bus becomes
idle
0xB3
Data received
RXDATA interrupt
ACK +
ACK will be transmitted, reception continues
flag(BUSHOLD
interrupt flag)
RXDATA
NACK +
CONT +
RXDATA
ACK/
NACK +
STOP
ACK/
NACK +
START
ACK/
NACK +
STOP +
START
NACK will be transmitted, reception continues
ACK/NACK will be sent and the bus will be
released.
ACK/NACK will be sent, and then a repeated
start condition.
ACK/NACK will be sent and the bus will be
released. Then a START will be sent when the
bus becomes idle
-
Stop received
MSTOP interrupt flag
None
2011-04-12 - d0001_Rev1.10
156
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