Epson TM-U925 Manual page 25

Pin number Signal name
20 DTR
25 INIT
NOTES: 1. When the remaining space in the receive buffer drops to 16 bytes, the printer status
becomes "buffer full" and it remains "buffer full" until the space in the receive buffer
increases to 26 bytes.
2. The printer ignores the data received when the remaining space in the receive buffer is 0
bytes.
4) XON/XOFF transmit timing
When XON/XOFF control is selected, the printer transmits XON or XOFF signals as follows.
Transmit timing differs depending on the DIP SW2-5 setting.
XON transmission
XOFF Transmission
NOTES: · The XON code is 11H(17) and the XOFF code is 13H(19).
· In case Â, XON is not transmitted when the receive buffer is full.
· In case Å, XOFF is not transmitted when the receive buffer is full.
EPSON
Table 2.1.1 TM-U925 Printer Status and Signals (continued)
Signal direction
Output
2) When XON/XOFF control is selected:
The signal indicates whether the printer is correctly
connected and is ready to receive data. SPACE indicates
that the printer is ready to receive data. The signal is
always SPACE except in the following cases:
ù During the period from when the power is turned on to
when the printer is ready to receive data
ù During the self-test
Input
Changing the DIP switch setting enables this signal to be used
as a reset signal for the printer.
The printer is reset when the signal remains SPACE for 1 ms or
more.
Table 2.1.2 XON/XOFF Transmit Timing
À When the printer goes on-line after turning on the
power (or reset using interface)
Á When the receive buffer is released from the buffer
full state
 When the printer switches from off-line to on-line
à When the printer recovers from an error using the
DLE ENQ 1 or DLE ENQ 2 commands
Ä When the receive buffer becomes full
Å When the printer switches from on-line to off-line
TITLE
TM-U925
Specification
(STANDARD)
Function
Printer status
SHEET
REVISION
DIP SW 2-5 status
ON
Transmit
Transmit
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Transmit
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NO.
NEXT SHEET
A
18
OFF
Transmit
Transmit
Transmit
Transmit
Transmit
Transmit
17