Datasheet

486
11011B–ATARM–21-Feb-12
SAM3N
486
11011B–ATARM–21-Feb-12
SAM3N
28.10.5.3 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 28-27 on page 486 describes the General Call access.
Figure 28-27. Master Performs a General Call
Note: This method allows the user to create an own programming sequence by choosing the program-
ming bytes and the number of them. The programming sequence has to be provided to the
master.
0000000 + W
GENERAL CALL
P
S
A
GENERAL CALL Reset or write DADD
A New SADR
DATA 1
A DATA 2
A
A
New SADR
Programming sequence
TXD
GCACC
SVACC
RESET command = 00000110X
WRITE command = 00000100X
Reset after read