78M6610+PSU Data Sheet
If the register address pointer has not been set by previous operations, it is necessary to set it issuing a
command as follows:
S
Device Address
0
S
Register Address (n)
P
0 1 2 3 4 5 6
0 1 2 3 4 5 6 7
S
T
A
R
T
A
C
K
A
C
K
S
T
O
P
Random Read: random read operations allow the master to access any register in a random manner. To
perform this operation, the register address must be set as part of the write operation. After the address is
sent, the master generates a start condition following the acknowledge response. This sequence
completes the write operation. The master should issue the control byte again this time, with the R/W bit
set to 1 to indicate a read operation. The 78M6610+PSU will issue the acknowledge response, and
transmit the data.
At the end of the transaction the master will not acknowledge the transfer and generate a STOP
condition.
S
S
T
A
R
T
Device Address
0 1 2 3 4 5 6
0
A
C
K
S
Register Address (n)
0 1 2 3 4 5 6 7
S
R
A S
C T
K A
R
T
Device Address
0 1 2 3 4 5 6
1
A
C
K
Data Data
7 6 5 4 3 2 1 0 0 1 2 3 4 5 6 7
A
C
K
Data
0 1 2 3 4 5 6 7
N
O
A
C
K
S
This read operation is not limited to 3 bytes but can be extended until the register address pointer
reaches its maximum value.
52
Rev 1
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