Seiko Group TM-L60 Serial interface timing, Pin Number Signal Name Signal Direction Function

2. Interface connector terminal assignments and signal functions

Pin Number

Signal Name

Signal Direction

Function I

1	FG	-		Frame ground
2	TXD		output	Transmit data
3	RXD		Input	Receive data
6	DSR		Input	Data set ready
7	GND	-		Signal GND
20	DTR		output	Data terminal ready

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]	• The period from when the power is turned on to when
	the printer first becomes ready to receive data.
	• In an error state.
	• When the remaining space in the receive buffer be
	comes 10 bytes.
	• When feeding paper with the paper feed switch.
	• In paper feed switch waiting state with <GS FF>
	command.
	• In paper feed switch waiting state during macro ex-
	ecution.
	• When printing down-loaded bit image with <GS />.
[DTR SPACE]	• When the printer first becomes ready to receive data
	after power-on.
	• When the remaining space in the receive buffer be
	comes 20 bytes.

[XON Transmission] • When DTR becomes SPACE.

[XOFF Transmission] • When DTR becomes MARK.

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.

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