AT32UC3B0512_1 Datasheet, PDF (242/676 Pages) ATMEL Corporation – 32-bit AVR® Microcontroller

AT32UC3B
19.13.5.3
General Call
The general call is performed in order to change the address of the slave.
If a GENERAL CALL is detected, GACC is set.
After the detection of General Call, it is up to the programmer to decode the commands which
come afterwards.
In case of a WRITE command, the programmer has to decode the programming sequence and
program a new SADR if the programming sequence matches.
Figure 19-26 on page 242 describes the General Call access.
Figure 19-26. Master Performs a General Call
0000000 + W
RESET command = 00000110X
WRITE command = 00000100X
TXD
GCACC
SVACC
S GENERAL CALL ^A Reset or write DADD ^A DATA1 ^{A DATA2 A New SADR A P}
New SADR
Programming sequence
Reset after read
Note:
1. This method allows the user to create an own programming sequence by choosing the pro-
gramming bytes and the number of them. The programming sequence has to be provided to
the master.
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