Confidential
EPSON
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A
10
11
TM-U220A
Specification
(For Argentina Fiscal)
Table 2.1.2 Interface Terminal Assignments and Signal Functions
Pin
number
Signal
name
Signal
direction
Function
1 VBUS Input
POWER
2
D-
Input/Output
USB data transmission
3
D+
Input/Output
USB data transmission
4 N.C.
-
No.
Connection
5 GND Input
GND
2.1.2 Fiscal terminal interface
2.1.2.1 Specifications
Format: RS232C-compatible
Data transmission:
Serial
Synchronization: Asynchronous
Handshaking:
DTR/DSR, XON/XOFF, or no flow control (software configurable)
Signal levels:
MARK = -3 to -15 V: Logic "1"/OFF
SPACE = +3 to +15 V: Logic "0"/ON
Baud rate:
1200-115200 bps (software configurable)
Data word length:
7 or 8 bits (software configurable)
Parity settings:
Odd, even, or none (software configurable)
Stop bits:
1
Connector (UB side):
DSUB-9 pin (female) connector
Table 2.1.2.2 Interface Terminal Assignments and Signal Functions
Pin
number
Signal
name
Signal
direction
Function
1
Not
connected
2 RXD Input
Receive
data
3 TXD
Output
Transmit
data
4
DTR
Output
Data terminal ready
5 SG
-
Signal
ground
6
DSR
Input
Data set ready
7 -9
Not connected
2.2 Switching between online and offline
The printer does not have an online/offline switch. The printer goes offline:
1) Between when the power is turned on (including the printer reset through the interface) and when
the printer becomes ready to receive data.
2) During a self-test.
3) When the roll paper cover is open.
4) During paper feeding using the paper FEED button.
5) When the printer stops printing due to a paper-end (in cases where a paper-out is detected by the
roll paper end sensor or where a paper-out occurs when a printing halt feature is enabled by
ESC
c 4
).
6) When an error has occurred.
