ICS94236 データシートの表示（PDF） - Integrated Circuit Systems

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ICS94236

Programmable System Clock Chip forAMD - K7™ processor

Integrated Circuit Systems 

ICS94236

General I2C serial interface information for the ICS94236

How to Write:

• Controller (host) sends a start bit.

• Controller (host) sends the write address D2 (H)

• ICS clock will acknowledge

• Controller (host) sends a dummy command code

• ICS clock will acknowledge

• Controller (host) sends a dummy byte count

• ICS clock will acknowledge

• Controller (host) starts sending Byte 0 through Byte 20

(see Note)

• ICS clock will acknowledge each byte one at a time

• Controller (host) sends a Stop bit

How to Write:

Controller (Host)

Start Bit

Address D2(H)

ICS (Slave/Receiver)

Dummy Command Code

Dummy Byte Count

Byte 0

Byte 1

Byte 2

Byte 3

Byte 4

Byte 5

Byte 6

How to Read:

• Controller (host) will send start bit.

• Controller (host) sends the read address D3

(H)

• ICS clock will acknowledge

• ICS clock will send the byte count

• Controller (host) acknowledges

• ICS clock sends Byte 0 through byte 8 (default)

• ICS clock sends Byte 0 through byte X (if X was

(H)

written to byte 8).

• Controller (host) will need to acknowledge each byte

• Controller (host) will send a stop bit

How to Read:

Controller (Host)

Start Bit

ICS (Slave /Receive r)

Address D3(H)

ACK

ACK

ACK

ACK

ACK

ACK

ACK

ACK

If 7H has been written to B8

ACK

Byte 18

Byte 19

Byte 20

Stop Bit

*See notes on the following page.

0451A—01/10/03

If 12H has been written to B8

ACK

If 13H has been written to B8

ACK

If 14H has been written to B8

ACK

Stop Bit

3

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