PN 9001098
Rev. A
3-3
SATO M-10e TT/DT Printers Service Manual
Section 3. Interface Specifications
The receiving buffer will not be able to receive more data again until a “Buffer Available”
condition occurs. This takes place when the receiving buffer has emptied so that only 1MB bytes
of data are being held (2.0MB bytes from being full). At this time, DTR will go “high” or an
X-On is sent to tell the host that it can again receive data.
All printer error conditions (i.e., label our, ribbon out) will cause the printer to go busy (DTR
“low” or X-Off) until the problem is corrected and the printer is placed online. The printer will
also be busy if taken offline from the front panel.
3.4 IEEE 1284 Parallel Interface
The parallel interface for the M-10e printer is a Plug-In interface module that can be installed by
the user. It conforms to the IEEE 1284 specification. It will automatically detect the IEEE 1284
signals and operate in the high speed mode. If it does not detect the IEEE 1284 signals, it will
operate in the standard centronics mode, which is significantly slower. For this reason, an
interface cable and host interface conforming to the IEEE 1284 specification must be present to
fully utilize the speed capabilities. This interface also operates bi-directionally and can report the
status of the printer back to the host.
2.0 MB
2.95 MB
DTR Low
or
X-Off
DTR High
or
X-On
Buffer Near Full
1.0 MB
2.95 MB
DTR High
or
X-On
DTR Low
or
X-Off
Buffer Available
The Receive Buffer
Electrical Specifications
Printer Connection AMP 57-40360 (DDK) or equivalent
Cable Connection AMP 57-30360 (DDK) or equivalent
Cable IEEE 1284 Parallel, 10 ft. (3 m) or less
Signal Level High = +2.4V to + 5.0V
Low = 0V to -0.4V
Data Streams
<ESC>A..Job #1..<ESC>Z<ESC>A..Job #n..<ESC>Z
NOTE: SATO does not recommend the use of mechanical data switches commonly called
A/B switches, as they are known to damage both the computer and printer parallel ports.
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