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Applilet EZ for HCD Controller

APPENDIX B SERIAL COMMAND MODE COMMUNICATION COMMANDS

R20UT0435EJ1200 Rev. 12.00 49

Jul 31, 2014

<IIC>

In communication using an IIC, the host device is the master device. A communication operation such as that shown

below is performed for information acquisition (during reception) of the target device.

IIC communication example

Address specification

Note 1

SCL0

SDA0

789

Address

ACK

Start condition

12 78

NACK

D7 D6 D1

Basic format 1 (4 bytes)

Stop condition

12 789

12 78

D7 D6 D1

Host device transmission

Target device transmission

Note 2

Address

ACK

NACK

Start condition

Stop condition

Address specification

Note 1

Basic format 2 (1 byte)

Address specification

Note 1

SCL0

SDA0

789

Address

ACK

Start condition

12 78

NACK

D7 D6 D1

Basic format 1 (4 bytes)

Stop condition

12 789

12 78

D7 D6 D1

Host device transmission

Target device transmission

Note 2

Address

ACK

NACK

Start condition

Stop condition

Address specification

Note 1

Basic format 2 (1 byte)

Notes 1. Specify the address of the subject target device.

2. When the host device has transmitted a command whose status must be received with basic format 1,

communication must be performed by issuing a start condition from the host side, such as shown above for

“Target device transmission”.