Service manual

Page 3-9
Section 3. Interface Specifications
PN 9001080
Rev. A
SATO M-8485Se Standard Print Engine
Service Manual
X-On/X-Off Flow Control
X-On/X-Off flow control must be used whenever hardware (Ready/Busy) flow control is
not available or desirable. Instead of a voltage going high/low at pin 20, control
characters representing "Printer Ready" (X-On = 11 hexadecimal) or "Printer Busy" (X-
Off = 13 hexadecimal) are transmitted by the printer on pin 2 (Transmit Data) to the
host. In order for this method of flow control to function correctly, the host must be
capable of supporting it. X-On/X-Off operates in a manner similar to the function of pin
20 (DTR) as previously explained. When the printer is first powered on it sends an X-
Off when the "Buffer Near Full" level is reached and a X-On when the data level of the
buffer drops below the "Buffer Available" mark. When the printer is taken off-line
manually it transmits an X-Off indicating it cannot accept data. When it is placed back
on line manually, it sends an X-On, indicating it is again available for receipt of data. If
an error occurs during printing (paper out, ribbon out), the printer sends an X-Off as
soon as an error condition is detected. When the error is cleared and the printer is placed
back on-line, it transmits as X-On indicating it is again ready to accept data.
Upon power up if no error conditions are present, the printer will continually send
X-On characters at five millisecond intervals until it receives a transmission from the
host.
Data Streams
The data streams for X-On/X-Off and Ready/Busy flow control are constucted in the
same way as they are for Ready/Busy flow control.
<ESC>A .. Job#1 .. <ESC>Z<ESC>A .. Job#n .. <ESC>Z
Example: <ESC>A .. Job#1 .. <ESC>Z
NOTE: All characters are in ASCII.
3.6 Universal Serial Bus (USB) Interface
The Universal Serial Bus (USB) interface is a Plug-In Interface Module that can be
installed by the user. It requires a driver (shipped with each printer that has the interface
installed) that must be loaded on your PC and the PC must be configured to support USB
peripherals using Windows 98. Details for loading the USB driver are contained in the
USB Interface Manual that is shipped with each printer with a USB Optional interface
installed. Up to 127 devices may be connected to a USB port.
General Specifications:
Connector: USB Type B Plug
Cable: 10ft (3 m) max.
Host: Windows 98
USB Port
Electrical Specifications:
Power Supply: Bus Power through cable
Power Consumption:: +5V@80ma