AMT Datasouth Accel-7350 Service Manual page 16

XON/XOFF Protocol
A protocol whereby the printer sends to the host XON (11h) and XOFF (13h)
codes to indicate the printer the printer's state.
The XOFF (13h) code is sent to the host to indicate not ready. In either the
busy or offline state, CTS is held "low".
When the power is turned on, the XON code is sent to the host.
In the following cases, the XOFF code is sent to the host.
(1) When the printer state changes from ready to busy.
(2) When the printer state changes from ready to offline.
(3) When printer receives 64 bytes to data after condition (1) or (2) occurs.
(4) When the buffer is full regardless of the online state or the offline state.
In the following cases, the XON code is sent to the host.
(1) When the printer state changes from busy to ready.
(2) When the printer state changes from offline to online.
(3) After the power is turned on, when the printer enters the online state.
Baud Rate
In the setup mode, one of the following baud rates can be selected: 300, 600,
1200, 2400, 4800, 9600, and 19200.
Serial Data Structure: data frame consists of, start bit (1) + data bits (7 or 8) +
parity bit (0 or 1) + stop bit (1 or 2).
(However, when the remaining capacity of the buffer is smaller than 64
bytes, the XOFF is not sent to the host).
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