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Toshiba B-SX4T Series Specification Page 25

B-sx4t series, b-sx5t series external equipment interface specification.
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Receiving data in the Compatibility mode when the blank positions in the receive buffer are
512 bytes or less:
When the blank positions in the receive buffer become 512 bytes or less, the printer stores
all of the already received data in the receive buffer, continues to be in a Busy state (Busy
signal at "High" level) for 10 seconds to extend the data read interval when data is set from
the host, then reads the data 10 seconds later.
If the blank positions becomes 513 bytes or more while waiting for reading data, the printer
will receive the data with the normal data receive timing.
When there are no blank positions in the receive buffer, the printer stops reading data.
Then, it continues to be in a Busy state (Busy signal at "High" level) until there are blank
positions in the receive buffer when data is set from the host.
Data 1 ~ 8
(Host → Printer)
nStrobe
(Host → Printer)
Busy
(Host ← Printer)
nAck
(Host ← Printer)
(12) Relationship between Printer Setting and PC Setting and Their Operation Modes
Printer setting
Compatibility mode (SPP)
ECP mode (ECP)
* When the Compatibility mode is selected for the printer setting, the printer does not respond to
the ECP negotiation from the host.
* When the ECP mode is selected for the printer setting, the Busy signal does not become HIGH
even if an error occurs.
* SPP mode operations include support for the Nibble mode.
* When SPP mode is selected for the printer setting, the printer returns 13 bytes of status
(described at the top of the next page) to the Nibble mode negotiation immediately after [ESC]
WS [LF] [NUL] is received. The printer returns 23 bytes of status with the receive buffer free
space information (described in (13) on the next page) to the Nibble mode negotiation
immediately after [ESC] WB [LF] [NUL] is received,
* When ECP mode is selected for the printer setting, the printer returns 13 bytes of status,
(described at the top of the next page) to the Nibble mode negotiation or the ECP mode reverse
request immediately after [ESC] WS [LF] [NUL] is received. The printer returns 23 bytes of
status with the receive buffer free space information (described in (13) on the next page) to the
Nibble mode negotiation or the ECP mode reverse request immediately after [ESC] WB [LF]
[NUL] is received.
10 sec
10 sec
511 blank
512 blank bytes
Windows95/98/Me
Host setting
Compatibility
SPP
SPP
- 21 -
1 blank byte
WindowsNT4.0
ECP
Compatibility
SPP
SPP
ECP
SPP
0 blank byte
1 blank byte
Windows2000/XP
ECP
Compatibility
SPP
SPP
SPP
SPP
ECP
SPP
SPP

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