MCP960X datasheet(23/57 Pages) MICROCHIP

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DS20005426G-page 23

MCP960X/L0X/RL0X

FIGURE 4-4:

Timing Diagram to Set a Register Pointer, Write One Byte, and Read the Data.

SDA

456

SCL

Address Byte

11 0 0 A

3 4 5 678

3 4 567 8

Address Byte

LSB Data

Host

SDA

SCL

x x xxx x x x

TABLE 4-3:

POINTERS

Read/Write

Registers

Pointer

STATUS

0000 0100

Configuration

0000 0101

0000 0110

456

Note: this is an example pseudo routine:

i2c_start();

// send START command

i2c_write(b’1100 0000’);

// WRITE Command

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

i2c_write(b’0000 0101’);

// Write Status or Configuration registers

i2c_write(b’XXXX XXXX’);

// Write register data

i2c_stop();

// send STOP command

i2c_start();

// send START command

i2c_write(b’1100 0001’);

// READ Command

// also, make sure bit 0 is set ‘1’

Data = i2c_read(NAK);

// READ 8 bits (with t

STRETCH delay)

// and Send NAK bit

i2c_stop();

// send STOP command

Device*

MCP960X/L0X/RL0X Clock Stretching,

tSTRETCH

Device*

Configuration

(Table 4-3)

*MCP960X/L0X/RL0X

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