Confidential

3.3.3.2 Parallel interface specification

 

 

 

 

 

Table 3.3.5

DIP Switch 1

 

 

SW

Function

 

ON

OFF

 

1

Auto line feed

 

Always enabled

Always disabled

 

2

Receive buffer capacity

 

45 bytes

4 KB

 

3-8

Undefined

 

---

---

Table 3.3.6 DIP Switch 2

SW

Function

ON

 

OFF

1

Handshaking (BUSY condition)

Receive buffer full

Offline

 

 

 

 

 

 

Receive buffer full

2

Reserved (Do not change settings)

---

 

Fixed to Off.

3

Selects print density /

Refer to Table 3.3.7

 

 

4

Low power consumption mode

 

 

 

 

5

Setting the release condition of the

Releases the BUSY

Releases the BUSY

 

receive buffer BUSY state (this function

state when the

state when the

 

is effective when the capacity of the

remaining capacity of

remaining capacity of

 

receive buffer is set to 4 KB.)

the receive buffer

the receive buffer

 

 

 

 

reaches 138 bytes.

reaches 256 bytes.

6

Reserved (Do not change settings)

---

 

Fixed to Off.

7

Reserved (Do not change settings)

---

 

Fixed to Off.

8

I/F pin 31 reset signal

Fixed to On

 

---

 

(Do not change settings)

 

 

 

 

 

 

 

Table 3.3.7 DIP Switch 2-3 and 2-4

 

 

Level

Function

SW 2-3

SW 2-4

 

 

 

Low power consumption mode

ON

ON

 

 

1

 

Print density (Normal)

OFF

OFF

 

 

2

 

 

 

ON

OFF

 

 

 

 

 

 

 

 

 

 

 

 

3

 

Print density (Dark)

OFF

ON

 

 

NOTES: Changes in DIP switch settings (excluding switch 2-8, interface reset signal) are recognized only when the printer power is turned on or when the printer is reset by using the interface. If the DIP switch setting is changed after the printer power is turned on, the change does not take effect until the printer is turned on again or is reset.

If the DIP switch 2-8 is turned on while the printer power is turned on, the printer may be reset, depending on the signal state. DIP switches should not be changed while the printer power is on.

If the print density is set to level 2 or 3, printing speed is inclined to be low speed.

In a low power consumption, printing speed is fixed to 70 mm/s.

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Epson T88III specifications Parallel interface specification DIP Switch, DIP Switch 2-3