Toshiba B-570 SERIES Owner's Manual page 43

1. OUTLINE OF THE SYSTEM
READY/BUSY (RTS) Protocol
• When initialized after power on, this printer becomes ready to receive data and converts
the RTS signal to "High" level (READY).
• The printer converts the RTS signal to "Low" level (BUSY) when the blank positions in
the receive buffer amount to 800 Bytes or less.
• The printer converts the RTS signal to "High" level (READY) when the blank positions
in the receive buffer amount to 2 KB or more.
• When there are no blank position in the receive buffer, the printer discards data received
which exceed 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.)
• Both the DTR signal output from the printer and the DSR signal output from the PC are
always "High".
NOTES:1. When performing the flow control with Windows, in the port setting screen,
select "Hardware" for flow control. [set to the READY/BUSY (RTS) protocol]
2. Under the READY/BUSY (DTR) protocol, after turning the printer power ON,
send data 200ms after the DTR signal is converted to "High" level (READY).
And under the READY/BUSY (RTS) protocol, after turning the printer power
ON, send data 200ms after the RTS signal is converted to "High" level (READY).
1-7
EM10-33006A
(Revision Date: Aug. 5 '99)
1.5 ELECTORONICS SPECIFICATIONS