Confidential

3.3.3.2 USB interface specification

 

 

 

 

 

Table 3.3.5

DIP Switch 1

 

 

 

SW

Function

ON

OFF

Factory

 

 

 

 

 

setting

 

1

Auto line feed

Always enabled

Always disabled

OFF

 

2

Receive buffer capacity

45 bytes

4 KB

OFF

 

3

Undefined

---

---

OFF

 

4

Undefined

---

---

OFF

 

5

Undefined

---

---

OFF

 

6

Undefined

---

---

OFF

 

7

Undefined

---

---

OFF

 

8

Setting of USB power-saving feature

Disabled

Disabled

OFF

 

Table 3.3.6

DIP Switch 2

 

 

SW

Function

ON

OFF

Factory

 

 

 

 

setting

1

Handshaking (BUSY condition)

Receive buffer full

Offline

OFF

 

 

 

Receive buffer full

 

2

Reserved (Do not change settings.)

---

Fixed to Off.

OFF

3

Selects print density

See Table 3.3.7.

 

OFF

4

 

 

 

OFF

5

Setting the release condition of the

Releases the BUSY

Releases the BUSY

OFF

 

receive buffer BUSY state (this

state when the

state when the

 

 

function is effective when the

remaining capacity

remaining capacity

 

 

capacity of the receive buffer is set

of the receive buffer

of the receive buffer

 

 

to 4 KB.)

reaches 138 bytes.

reaches 256 bytes.

 

6

Reserved (Do not change settings.)

---

Fixed to Off.

OFF

7

Reserved (Do not change settings.)

---

Fixed to Off.

OFF

8

Reserved (Do not change settings.)

Fixed to On

---

OFF

Table 3.3.7 DIP Switch 2-3 and 2-4

3

4

Function

OFF

OFF

Print density (Standard)

ON

OFF

Print density (Medium)

OFF

ON

Print density (Dark)

ON

ON

Print density (Standard)

NOTES: 1. Change the DIP switch when the printer power is turned off.

2.Changes in DIP switch settings 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.

3.If the print density is set to “medium”/”dark” level, printing speed is inclined to be low speed.

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TM-T81

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Epson T81 specifications USB interface specification DIP Switch, DIP Switch 2-3