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CHAPTER 18 I
2
C BUS MODE (
µ
PD784225Y SUBSERIES ONLY)
User’s Manual U12697EJ3V0UM
18.5.13 Wake-up function
This is a slave function of the I
2
C bus and generates the interrupt request (INTIIC0) when the base address and
extended code were received.
When the address does not match, an unused interrupt request is not generated, and efficient processing is
possible.
When the start condition is detected, the wake-up standby function is entered. Since the master can become a
slave in an arbitration failure (when a start condition was output), the wake-up standby function is entered while the
address is transmitted.
However, when the stop condition is detected, the generation of interrupt requests is enabled or disabled based
on the setting of bit 5 (SPIE0) in I
2
C bus control register 0 (IICC0) unrelated to the wake-up function.
