COMMERCIALTEMPERATURERANGE

4

IDTCV145

1-TO-19DIFFERENTIALCLOCKBUFFER

INDEX BLOCK WRITE PROTOCOL

Bit

# of bits

From

Description

1

1

Master

Start

2-9

8

Master

See SMBus Address Mode table

10

1

Slave

Ack (Acknowledge)

11-18

8

Master

Registeroffsetbyte(startingbyte)

19

1

Slave

Ack (Acknowledge)

20-27

8

Master

Byte count, N (0 is not valid)

28

1

Slave

Ack (Acknowledge)

29-36

8

Master

first data byte (Offset data byte)

37

1

Slave

Ack (Acknowledge)

38-45

8

Master

2nd data byte

46

1

Slave

Ack (Acknowledge)

:

Master

Nth data byte

Slave

Acknowledge

Master

Stop

INDEX BLOCK READ PROTOCOL

Master can stop reading any time by issuing the stop bit without waiting

until Nth byte (byte count bit30-37).

Bit

# of bits

From

Description

1

1

Master

Start

2-9

8

Master

See SMBus Address Mode table

10

1

Slave

Ack (Acknowledge)

11-18

8

Master

Registeroffsetbyte(startingbyte)

19

1

Slave

Ack (Acknowledge)

20

1

Master

RepeatedStart

21-28

8

Master

See SMBus Address Mode table

29

1

Slave

Ack (Acknowledge)

30-37

8

Slave

Byte count, N (block read back of N

bytes)

38

1

Master

Ack (Acknowledge)

39-46

8

Slave

first data byte (Offset data byte)

47

1

Master

Ack (Acknowledge)

48-55

8

Slave

2nd data byte

Ack (Acknowledge)

:

Master

Ack (Acknowledge)

Slave

Nth data byte

Notacknowledge

Master

Stop

INDEX BYTE WRITE

Setting bit[11:18] = starting address, bit[20:27] = 01h.

INDEX BYTE READ

Setting bit[11:18] = starting address. After reading back the first data byte,

masterissuesStopbit.