Epson TM-L60 Operator's Manual page 74

2. Interface connector terminal assignments and signal functions
Pin Number Signal Name Signal Direction
1
2
3
6
7
20
3. Serial interface timing
a) Receive data
Either DTR/DSR or XON/XOFF control is selectable. Changes in DTR signal
and XON/XOFF transmission are as follows:
[DTR MARK]
[DTR SPACE]
[XON Transmission]
[XOFF Transmission]
b) Transmit data (Status information transmission)
When DTR/DSR control is selected, data is transmitted after confirming that
DSR is SPACE. When DTR/DSR control is not selected, data is transmitted
regardless of the DSR state.
FG
TXD output
RXD
DSR
GND
DTR output
The period from when the power is turned on to when
l
the printer first becomes ready to receive data.
In an error state.
l
When the remaining space in the receive buffer be
l
comes 10 bytes.
When feeding paper with the paper feed switch.
l
In paper feed switch waiting state with <GS FF>
l
command.
In paper feed switch waiting state during macro ex-
l
ecution.
When printing down-loaded bit image with <GS />.
l
When the printer first becomes ready to receive data
l
after power-on.
When the remaining space in the receive buffer be
l
comes 20 bytes.
When DTR becomes SPACE.
l
When DTR becomes MARK.
l
68
Function
-
Frame ground
Transmit data
Receive data
Input
Data set ready
Input
-
Signal GND
Data terminal ready
I