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TM-T90
Specification
(STANDARD)
18 17
2.1.1.3 Interface connector terminal assignments and signal functions
Interface connector terminal assignments and signal functions are described in Table 2.1.1.
Table 2.1.1 TM-T90 Printer Status and Signals
Pin
number
Signal name
Signal
direction
Function
1 FG —
Frame
ground
2 TXD
Output
Transmit
data
3 RXD
Input
Receive
data
4
RTS
Output Same as DTR signal (pin 20)
6
DSR
Input
This signal indicates whether the host computer can receive data.
SPACE indicates that the host computer can receive data, and MARK
indicates that the host computer cannot receive data.
When DTR/DSR control is selected, the printer transmits data after
confirming this signal.
When XON/XOFF control is selected, the printer does not check this
signal.
Changing memory switch Msw1-7 enables this signal to be used as a
reset signal for the printer (refer to Section 3.3.4).
The printer is reset when the signal remains MARK for 1 ms or more
(refer to Section 2.1.1.6).
7 SG —
Signal
ground
20
DTR
Output 1) When DTR/DSR control is selected, this signal indicates whether
the printer is busy. SPACE indicates that the printer is ready to
receive data, and MARK indicates that the printer is busy. The busy
condition can be changed by using the memory switch as follows
(refer to Section 3.3.4):
Printer status
Memory switch
Msw 1-3 status
1. During the period from when the power is
turned on (including resetting using the
interface) to when the printer is ready to
receive data.
BUSY BUSY
2. During the self-test.
BUSY
BUSY
3. When the cover is open.
—
BUSY
4. During paper feeding using the paper
FEED button.
— BUSY
5. When the printer stops printing due to a
paper-end.
— BUSY
6. During standby status for macro
execution.
— BUSY
7. When a temporary abnormality occurs in
the power supply voltage.
— BUSY
O
ff
line
8. When an error occurs.
—
BUSY
9. When the receive buffer becomes full.(*1)
BUSY
BUSY