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Epson C82307*/C82308* (Type B, 32KB)

The 32KB serial interface card is an interface card that allows synchronous serial data communication between a host computer and an Epson printer. The board features:-

  • 32K bytes buffer
  • Two self test functions
  • Interface functions that can be set at either RS-232D, RS-422A or 20mA Current loop
  • Handshaking protocol using X-ON/X-OFF or DTR flag control.
  • Selectable data word structure. This allows a user to choose parity (odd, even, none or ignore) and word bit settings (either 7 or 8 bits)
  • Selection of baud rate settings from 75 to 38,400 bps. (Data transmission speed is limited to 19,200 bps when the transmission is set to RS-232D or 20mA Current loop.
Switch No.FunctionOnOff
SW1-1Interface cardEnableDisable
SW1-2Word length selection8 bits7 bits
SW1-3Parity check 1See table 2
SW1-4Parity check 2See table 2
SW1-5Bit rate selectionSee table 1
SW1-6Bit rate selectionSee table 1
SW2-1Bit rate selectionSee table 1
SW2-2Bit rate selectionSee table 1
SW2-3HandshakingSee table 3
SW2-4HandshakingSee table 3
SW2-5Interface SelectionSee table 4
SW2-6Interface SelectionSee table 4
SW3-1Buffer OperationDisableEnable
SW3-2Flag reset timingSee table 5
SW3-3Flag reset timingSee table 5
SW3-4Flag (DTR) positive/negative polarity selectionNegativePositive
SW3-5DSR/DCD signalsEnableDisable
SW3-6DTR flag set timing512 bytes16 bytes
SW3-7Self-test enable/disableEnableDisable
SW3-8Self-test selectionLine MonitorLoop back


JumperFunction
 J1-A is ON, J2-A is ON, J3 is ON:
J1A host computer is not equipped with current source for the Current loop
J2transmitting (Non-isolated) (Note 1)
J3J1-B is ON, J2-B is ON, J3 is OFF:
 A host computer is equipped with current source for the Current loop
 transmitting (Isolached) (Note 1)
J4ON: Received RDA through pin No 3 at RS-422A (Also can be received RDA through pin No. 16)
OFF: Received RDA through pin No. 16 at RS-422A
J5Fixed (Note 2)
J6Fixed (Note 3)
J7Fixed (Note 3)
JGON: Connect shield ground to signal ground

Table 1

Baud RateSW1-5SW1-6SW2-1SW2-2
75OFFOFFONON
110OFFONOFFOFF
134.5OFFONOFFON
150OFFONONOFF
200OFFONONON
300ONOFFOFFOFF
600ONOFFOFFON
1,200ONOFFONOFF
1,800ONOFFONOFF
2,400ONONOFFOFF
4,800ONONOFFON
9,600ONONONOFF
19,200ONONONON
9,600OFFOFFONOFF
19,200OFFOFFOFFON
38,400OFFOFFOFFOFF

Table 2

Parity CheckSW1-3SW1-4
NoneOFFOFF
IgnoreOFFON
OddONOFF
EvenONON

Table 3

HandshakingSW2-3SW2-4
DTROFFOFF
X-on/X-offOFFON
ReservedONOFF
ReservedONON

Table 4

Interface SelectSW2-5SW2-6
RS-232DOFFOFF
RS-422AOFFON
Current loopONOFF
ReservedONON

Table 5

Vacant area for bytesSW3-2SW3-3
768OFFOFF
1,024OFFON
2,048ONOFF
4,096ONON

Note: Flag reset timing is set to 32 bytes regardless of these settings when buffer operation is disabled (SW3-1 is ON)