MCP98244 datasheet(19/52 Pages) MICROCHIP

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DS20002327D-page 19

MCP98244

FIGURE 5-4:

Timing Diagram for Reading from the Configuration Register (See Section 4.0

“Serial Communication”).

SDA

Configuration Pointer

678

SCL

Address Byte

MSB Data

678

Address Byte

LSB Data

MCP98244

Host

SDA

SCL

• Reading the CONFIG Register.

Note:

It is not necessary to

select

the

pointer if it was set from

the previous read/write.

Note: this is an example routine:

i2c_start();

// send START command

i2c_write(AddressByte & 0xFE);

//WRITE Command

//also, make sure bit 0 is cleared ‘0’

i2c_write(0x01);

// Write CONFIG Register

i2c_start();

// send Repeat START command

i2c_write(AddressByte | 0x01);

//READ Command

//also, make sure bit 0 is set ‘1’

UpperByte = i2c_read(ACK);

// READ 8 bits

//and Send ACK bit

LowerByte = i2c_read(NAK);

// READ 8 bits

//and Send NAK bit

i2c_stop();

// send STOP command

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