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24 23
TM-T88III series
Specification
(STANDARD)
B
2.1.3.3 Interface pin assignments
Table 2.1.5 TM-T88III Printer Status and Signals
Pin
Number
Signal
name
Signal
direction
Function
1 FG -- Frame ground
2
3
SD1
SD2
Output Transmit data
4
5
RD1
RD2
Input Receive data
7 SG -- Signal ground
8
9
DR1
DR2
Output When DTR/DRS is selected, this signal indicates whether the host
computer is BUSY or READY.
1) DR1>DR2 indicates that the printer is READY and DR1<DR2
indicates that the printer is BUSY. The BUSY condition can be
changed depending on the offline conditions set by the DIP switches
(refer to Section 3.3.3).
When the DTR/DSR control is selected, the printer becomes the
BUSY state (DR1<DR2) under the following conditions.
DIP SW 2-1 status
Printer status
ON OFF
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. (only when the paper roll is
not present)
— BUSY
6. During macro executing standby status. — BUSY
7. When a temporary abnormality occurs in
the power supply voltage.
— BUSY
Offline
8. When an error has occurred. — BUSY
9. When the receive buffer becomes full.(*1) BUSY BUSY
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 DR1>DR2 (READY) indicates
that the printer is ready to receive data. The signal is always
DR1>DR2 except in the following cases:
• During the period from when the power is turned on to when the
printer is ready to receive data
• During the self-test