Toshiba B-SA4T Series Product Description page 15

1. OUTLINE
Flow control
XON/XOFF (DC1/DC3) protocol
This is a software flow control using XON (DC1)/XOFF (DC3) code.
• When initialized after power on, this printer becomes ready to receive data and sends an
XON code (11H). (Transmission or non-transmission of XON code is selectable by means of
the parameter setting.)
• The printer sends an XOFF code (13H) when the free area in the receive buffer becomes
10K Bytes or less.
• The printer sends an XON code (11H) when the free area in the receive buffer are 512KB or
more.
• When there is no free area in the receive buffer, the printer discards received data which
exceeds the receive buffer capacity without storing it in the buffer. (After detecting the XOFF
code, the host computer must stop transmission before the printer receive buffer becomes
full.)
• The printer sends an XOFF code (13H) at power off time. (Transmission or non-transmission
of XOFF code is selectable with the parameter setting.)
• The DTR signal is always "High" level (Ready).
• The RTS signal is always "High" level (Ready).
READY/BUSY (DTR) protocol
This is a hardware flow control using DTR signal as a control code.
• When initialized after power on, this printer becomes ready to receive data and converts the
DTR signal to "High" level (READY).
• The printer converts the DTR signal to "Low" level (BUSY) when the free area in the receive
buffer amount to 10K bytes or less.
• The printer converts the DTR signal to "High" level (READY) when the free area in the
receive buffer amount to 512KB or more.
• When there is no free area in the receive buffer, the printer discards received data which
exceeds the receive buffer capacity without storing it in the buffer. (After detecting a BUSY
signal, the host computer must stop transmission before the printer receive buffer becomes
full.)
• The RTS signal is always "High" level.
XON/XOFF (DC1/DC3) protocol + READY/BUSY (DTR) protocol
This is a software and hardware flow control using XON/XOFF code and DTR signal.
• When initialized after power on, this printer becomes ready to receive data and converts the
DTR signal to "High" level (READY). The printer sends an XON code (11H).
• When the free area in the receive buffer are 10K bytes or less, the printer converts the DTR
signal to "Low" level (BUSY) and sends an XOFF code (13H).
• When the free area in the receive buffer are 512KB or more, the printer converts the DTR
signal to "High" level (READY) and sends an XON code (11H).
• When there is no free area in the receive buffer, the printer discards received data which
exceeds the receive buffer capacity without storing it in the buffer. (After detecting the XOFF
code or BUSY signal, the host computer must stop transmission before the printer receive
buffer becomes full.)
• The printer sends an XOFF code (13H) at power off time.
• The RTS signal is always "High" level.
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EO10-33016A
1.5 Electronics Specifications