Dm-D110 And Pc Connection Cable - Epson DM-D110 Technical Reference Manual

4.3 DM-D110 and PC Connection Cable

The host interface connector connects the host computer to the DM-D110 standard model via the
DM-D stand.
Type: D-SUB 25-pin connector (female type)
The optional stand provides the host interface connector shown in the figure below.
Host interface connector pin assignments
4.3.0.1
Host interface connector pin assignments
Pin Signal
Number Name
1 FG
2 TXD
3 RXD
4 (*1) RTS
6 (*2) DSR
7 GND
20 (*1) DTR
25 RESET
NOTES: (*1): Make sure to use either the RTS or the DTR terminal. Otherwise, the built-in RS-232 driver IC
(*2): This signal is connected to the DTR terminal of the printer directly.
4-6 Hardware
Signal
Function
Direction
— Frame ground
Output 1) When the DM-D110 is connected with a pass-through or Y-type
connection, transmits data to the host from the printer.
2) When the DM-D110 is connected as a standalone: transmits data to
the host from the DM
Input Receives data from the host (host —> DM)
Input Same as DTR
Input Indicates whether the host is ready to receive data.
SPACE
MARK
— Signal ground
Output This indicates whether the display is ready to receive data (*2).
SPACE
MARK
DTR MARK
DTR goes to MARK under the following conditions:
1) The period from when power is turned on to when the display first
becomes ready to receive data.
2) When the self-test is executed.
3) When the remaining space in the receive buffer becomes 128 bytes
or less (buffer-full state).
4) When DSR MARK is on, if the printer is selected by a peripheral device
command.
DTR SPACE
DTR goes to SPACE under the following conditions:
1) When the display first becomes ready to receive data after power-
on.
2) When the self-test has ended.
3) When the remaining space in the receive buffer becomes 50 bytes
or more after having been 40 bytes or less.
Input Reset signal is connected to the DTR terminal of the printer directly.
may be broken.
The host is ready to receive data.
The host is not ready to receive data.
The display can receive data.
The display cannot receive data.
Rev. A