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5.3. Operation by Commands

5.3.1. Handling Commands

Specify the R / W flag either to the read command or the write command.

R / W flag: 0: Write command 1: Read command

Specify a command to execute to the command No.

Specify the command data to be written to Write data.

The command will be effective at the rising edge of the command request flag.

The signal level must be maintained for 30 msec minimum.

The response result to the command request is output as the command request

response flag.

The command response result is output as the command No. response.

The response result of the read command is output as the read data.

5.3.2. Command execution procedure

Before execution

Step 1 Confirm that the command request flag is turned OFF.

Step 2 Specify the R / W flag either to the read command or the write command.

R / W flag: 0: Write command 1: Read command

Step 3 Specify the command to execute to the command No.

Step 4 Specify the command data to be written to Write data when necessary.

Execution

Step 5 Confirm that the slave ready bit is turned ON.

Step 6 Turn the command request flag ON. The command will be executed at the rising

edge.

Step 7 The AD-4408A responses. The response results are output as the command

request response flag, R / W response flag and command No. response.

Step 8 When the read command is specified by the R / W flag, a response will be output

as the read data.

After execution

Step 9 Turn the command request flag OFF.

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A&D AD-4408A Bedienerhandbuch Seite 16