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Confidential
XON/XOFF Control
The XON code is defined as character 11h, and the XOFF code is 13h. A DIP switch on the TM
printer selects the handshaking conditions under which it sends the XON and XOFF codes.
Table 4-2 TM printer XON/XOFF sending conditions
Printer DIP Switch
Setting
ON
OFF
(*) During the receive buffer full state, XON and XOFF are not sent even when the online/offline state is changed.
The term "offline" as used above means any of the following conditions:
❏ During power-on or resetting.
❏ While executing the self test.
❏ While the cover is open.
❏ When feeding paper by the paper feed button.
❏ When printing has stopped due to out-of-paper condition.
❏ When an error has occurred.
The term "online" refers to the state when any of the above conditions has been cancelled.
4-2 Function Description
XON/XOFF Sending
Sending Condition
• When first online after power on or reset
Sends XON
• When a receive buffer full condition is cancelled
• When the receive buffer becomes full
Sends XOFF
• When first online after power on or reset
Sends XON
• When a receive buffer full condition is cancelled
• When switched from offline to online (*)
• When recovering from a recoverable error by a command
• When the receive buffer becomes full
Sends XOFF
• When switched from offline to online (*)
Rev. B
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