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Table 7-12. I2C Wakeup Enable Register (I2C_WE) Field Descriptions (continued)
Bit
Field
0
AL_WE
SPRUGX9 – 15 April 2011
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Preliminary
Value
Description
Arbitration lost IRQ wakeup enable. This read/write bit is used to enable or disable wakeup signal
generation when I2C module is configured as a master and it loses the arbitration. This wake up is
very useful when the module is configured as a master transmitter, all the necessary data is
provided in the FIFO Tx, STT is enabled and the module enters in Idle Mode. If the module loses
the arbitration, an Arbitration Lost event is raised and the module needs to inform CPU about
transmission error.
Note: The AL wakeup must be enabled only for multimaster communication. If the AL_WE is not
enabled and the scenario described above occurs, the module will not be able to inform the CPU
about the state of the transfer and it will be blocked in an undetermined state.
0
Arbitration lost wakeup disabled
1
Arbitration lost wakeup enabled
© 2011, Texas Instruments Incorporated
Inter-Integrated Circuit (I2C) Controller Module
Registers
875
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