© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
User manual Rev. 01 — 12 January 2006 135
Philips Semiconductors
UM10161
Volume 1
Chapter 11: I
2
C interfaces
If the AA bit is reset during a transfer, the I
2
C block will return a not acknowledge (logic 1)
to SDA after the next received data byte. While AA is reset, the I
2
C block does not respond
to its own slave address or a general call address. However, the I
2
C-bus is still monitored
and address recognition may be resumed at any time by setting AA. This means that the
AA bit may be used to temporarily isolate the I
2
C block from the I
2
C-bus.
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