Detailed Descriptions of Commands

General Purpose Control

Commands

C.E. (41H)

This clears the error status or the last character of numerical data entered. A sign entered cannot be cleared with this command. To clear a sign, enter the new sign.

C.L. (56H)

This releases the error status and clears the present command. If the C.L. command is sent after issuing a command with numerical parameter but before confirming the numerical parameter, the numerical parameter input is stopped, and the command with numerical value parameter is cleared.

EXP-1 (D8H), EXP-3 (DAH)

EXP-1 and EXP-3 are the first and third extended commands. These commands become valid after they are combined with a secondary command. If any other command is issued between this command and the secondary command, the extended command is canceled, and NAK is returned.

Example: When the LOCK ON command is correctly executed.

EXP-1

CMD

 

RxD

D8H

 

94H

 

TxD 0AH 0AH

ACK ACK

Example: This is a case in which the LOCK ON command could not be correctly executed because a command other than a secondary command was issued after the extended command:

 

EXP-1

other CMD

CMD

RxD

D8H

 

 

 

72H

 

 

 

94H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TxD

0AH

 

 

 

0BH

 

 

 

0BH

 

 

 

 

 

ACK

 

 

NAK

 

 

 

NAK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Mode Control Commands

REC REQUEST (FAH)

This command must be issued immediately before sending the REC command.

SCREEN DIVIDE (DAH+90H)

Selects the display structure.

Two bytes for the number of divisions, another 2 bytes for the page number, and the ENTER command (40H) must follow.

Example: To select the second page of 4-division mode:

 

 

EXP-3

CMD

0

 

 

 

4

 

 

 

 

 

 

 

RxD

 

DAH

 

90H

 

 

 

30H

 

 

 

34H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TxD

 

 

 

0AH

 

 

 

0AH

 

 

 

0AH

 

 

 

0AH

 

 

 

 

 

 

 

 

 

 

ACK

 

 

ACK

 

 

ACK

 

 

ACK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

2

 

 

ENTER

 

 

 

 

 

 

 

 

 

 

 

30H

 

 

 

32H

 

40H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0AH

 

 

 

0AH

 

 

0AH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ACK

 

 

ACK

 

 

ACK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

SCREEN AUTO CHANGE (DAH+91H)

Automatically switches the display.

Parameter bytes to specify the output port (A or B) and the cycle in seconds and the ENTER command (40H) must follow.

If 00 is specified for the cycle, no automatic switching is executed.

If the output port is not specified, output port A is selected.

Example: To switch the display for output port A every 5 seconds:

 

EXP-3

 

 

CMD

 

 

 

A

5

 

 

ENTER

RxD

DAH

 

 

 

91H

 

 

 

3AH

 

 

 

35H

 

 

 

40H

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

TxD

0AH

 

 

0AH

 

 

0AH

 

 

0AH

 

 

 

0AH

 

 

 

 

 

ACK

 

ACK

 

ACK

 

ACK

 

 

 

ACK

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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