Datasheet

S
Device
Slave Address
0
A
Register Pointer
(Register Address)
A
High Byte to
Device Register
A A P
From Master to Slave
A = Acknowledge
N = Not Acknowledge
S = START Condition
P = Stop Condition
Sr = Repeated START Condition
From Slave to Master
Low Byte to
Device Register
AMC7812
www.ti.com SBAS513E –JANUARY 2011–REVISED SEPTEMBER 2013
AMC7812 Communication Protocol for I
2
C
The AMC7812 uses the following I
2
C protocols.
Writing a Single Word of Data to a 16-Bit Register (Figure 100)
1. The master device asserts a start condition.
2. The master then sends the 7-bit AMC7812 slave address followed by a zero for the direction bit, indicating a
write operation.
3. The AMC7812 asserts an acknowledge signal on SDA.
4. The master sends a register address.
5. The AMC7812 asserts an acknowledge signal on SDA.
6. The master sends a data byte of the high byte of the register (D15:D8).
7. The AMC7812 asserts an acknowledge signal on SDA.
8. The master sends a data byte of the low byte of the register (D7:D0).
9. The AMC7812 asserts an acknowledge signal on SDA.
10. The master asserts a stop condition to end the transaction.
Figure 100. Write Single Byte
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