MAX32665-MAX32668 User Guide
Maxim Integrated Page 299 of 457
Table 13-10: I
2
C Interrupt Flag 1 Register
I2C Interrupt Status Flags 1
START Condition Status Flag
If set, a device START condition has been detected.
0: START condition not detected.
1: START condition detected.
Slave Mode: TX FIFO Underflow Status Flag
In Slave Mode operation, the hardware sets this flag automatically if the TX FIFO is
empty and the master requests more data by sending an ACK after the previous byte
transferred.
0: Slave mode TX FIFO underflow condition has not occurred.
1: Slave mode TX FIFO underflow condition occurred.
Slave Mode: RX FIFO Overflow Status Flag
In Slave Mode operation, the hardware sets this flag automatically when an RX FIFO
overflow occurs. Write 1 to clear. Writing 0 has no effect.
0: Slave mode RX FIFO overflow event has not occurred.
1: Slave mode RX FIFO overflow condition occurred (data lost).
Table 13-11: I
2
C Interrupt Enable 1 Register
START Condition Interrupt Enable
0: Disabled.
1: Enabled.
Slave Mode TX FIFO Underflow Interrupt Enable
0: Disabled.
1: Enabled.
Slave Mode RX FIFO Overflow Interrupt Enable
0: Disabled.
1: Enabled.
Table 13-12: I
2
C FIFO Length Register
TX FIFO Length
Returns the length of the TX FIFO.
8: 8-byte TX FIFO.
RX FIFO Length
Returns the length of the RX FIFO.
8: 8-byte RX FIFO.
Table 13-13: I
2
C Receive Control 0 Register
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