MIC24045 datasheet(39/46 Pages) MICROCHIP

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DS20005568A-page 39

MIC24045

8.5.5

BLOCK WRITE (AUTO-INCREMENT

MODE)

This command writes data to the designated register

and to all the following registers that are specified

through the command byte. Bit<6> of the command

byte indicates the Auto-Increment mode. If this bit is

set, the address gets incremented by one automatically

and the registers are written in order, starting from the

address provided by the command byte.

The Block/Auto-Increment Write command is as

follows and it is illustrated in the timing diagram of

Figure 8-7 below.

Send START sequence

Send 7-bit slave address

Send the R/W bit - 0 to indicate a write operation

Wait for acknowledge from the slave

Send the command byte – address that needs to

be written with Bit<6> set high to indicate the

Auto-Increment Write mode.

Wait for acknowledge from the slave.

Receive the 8-bit data from the master and write

it to the slave register indicated in step 5,

starting from MSB.

Acknowledge from the slave

Repeat steps 7 and 8 until the entire data is sent

10. Send STOP sequence

FIGURE 8-7:

Block Write Timing Diagram.

SDA

SCL

START condition

R/W

ACK from Slave

Slave address

Command byte

ACK from Slave

Data to port

Data out from port

DATA 1 VALID

DATA 1

ACK from Slave

Data to port

DATA 1

Data to port

ACK from Slave

DATA 1

STOP condition

DATA 2 VALID

DATA n VALID

Note:

If the master is using a non-existing

generated.

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