Epson LQ-2550 Technical Manual page 157

DIP Switch Settings
Table 3-3 shows the 8143 DIP switch settings, and Table 3-4 lists the bit rates selected by the DIP switch
settings. When a standard 8-bit parallel interface is used instead of the 8143 VF board , DIP switch
1-8 should be turned off.
DIP SW
1-1 (JB3)
1-2 (J8/7)
1-3 (JB 1)
1-4 (JB2)
1-5 (JOIE)
1-6
1-7 (JB4)
1-8 (P/S)
Bit Rate
(BPS)
75 ON
110
ON
134.5 ON
150 ON
ON
300 ON
600
ON
1,200 ON
NOTE: In the current loop operation, normal data transfer cannot be guaranteed at a bit rate greater
than 1200 BPS.
Handshaking Timing
The handshake controls are shown
I
Transmission ~
Possible
! buffer is over 512 bytes.
Impossible
Error Handling
Errors are processed as follows:
Parity error:
Overrun error:
Framing error:
Table 3-3. DIP Switch Settings
Function
Bit rate selection
Data length selection
Bit rate selection
Bit rate selection
Parity selection
Parity selection
Bit rate selection
# 8143 l/F selection
Table 3-4. Bit Rate Selection
ON ON ON
ON ON OFF
ON
OFF ON
ON
OFF OFF
OFF ON ON
OFF ON OFF
OFF OFF ON
OFF OFF
OFF
in Table 3-5.
Table 3-5. 8143 Handshaking Control
Flag
an asterisk '"x" is printed,
ignored.
ignored.
ON
See Table 3-4.
7 bits
See Table 3-4.
See Table 3-4.
Even
Enabled
See Table 3-4.
Enabled
Bit Rate
(BPS)
OFF
2,400 OFF
4,800 OFF
9,600 OFF
19,200 OFF
19,200 OFF
OFF
19,200
19,200 OFF
Sends X-ON when the vacant area of the input
buffer reaches 512 bytes.
..-. —— -
Sends X-OFF when the vacant area of the
3-3
OFF
8 bits
Odd
Disabled
Disabled
ON ON
ON
ON
ON OFF
ON OFF
OFF ON
OFF ON
OFF OFF
OFF OFF
X-ON/OFF Control
ON
OFF
ON
OFF
ON
OFF
OFF