Denso BHT-100B User Manual

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Chapter 3.  Communications Operations of the BHT-100Q/100B

The control characters are classified into two groups:  transmission control characters
and text control characters.

The transmission control characters listed below are used to compose transmission
control sequences in phases 1 through 3.

Symbol

Value

Meaning

Function

DLE EOT

1004h

End Of Transmission

Releases a data link (Phase 3).

Requests abort of transmission
(Phase 2).

DLE ENQ

1005h

Enquiry

Requests establishment of a data link
(Phase 1).

Prompts the receiver to respond to
the sent text (Phase 2).

DLE ACK

1006h

Acknowledge

Acknowledgment response to DLE
ENQ (Phase 1).

Acknowledgment response to text
(Phase 2).

Acknowledgment response to DLE
EOT (Phase 3).

DLE NAK

1015h

Negative Acknowledge

Negative acknowledgment response
to DLE ENQ (Phase 1).

Negative acknowledgment response
to text (Phase 2).

WACK

103Bh

Wait for Acknowledge

Requests suspension of data recep-

tion during erasure of the flash
memory.

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The BHT uses the transparent mode which allows the control characters and codes
(e.g., STX, ETX, SOH, and DLE) to be transmitted as normal data in the transmis-
sion texts.

To transmit a DLE as normal data, type DLE DLE per DLE.