 Acer File Extensions |
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. | Function | On | Off |
|---|---|---|---|
| SW1-1 | Interface card | Enable | Disable |
| SW1-2 | Word length selection | 8 bits | 7 bits |
| SW1-3 | Parity check 1 | See table 2 | |
| SW1-4 | Parity check 2 | See table 2 | |
| SW1-5 | Bit rate selection | See table 1 | |
| SW1-6 | Bit rate selection | See table 1 | |
| SW2-1 | Bit rate selection | See table 1 | |
| SW2-2 | Bit rate selection | See table 1 | |
| SW2-3 | Handshaking | See table 3 | |
| SW2-4 | Handshaking | See table 3 | |
| SW2-5 | Interface Selection | See table 4 | |
| SW2-6 | Interface Selection | See table 4 | |
| SW3-1 | Buffer Operation | Disable | Enable |
| SW3-2 | Flag reset timing | See table 5 | |
| SW3-3 | Flag reset timing | See table 5 | |
| SW3-4 | Flag (DTR) positive/negative polarity selection | Negative | Positive |
| SW3-5 | DSR/DCD signals | Enable | Disable |
| SW3-6 | DTR flag set timing | 512 bytes | 16 bytes |
| SW3-7 | Self-test enable/disable | Enable | Disable |
| SW3-8 | Self-test selection | Line Monitor | Loop back |
| Jumper | Function |
|---|---|
| J1-A is ON, J2-A is ON, J3 is ON: | |
| J1 | A host computer is not equipped with current source for the Current loop |
| J2 | transmitting (Non-isolated) (Note 1) |
| J3 | J1-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) | |
| J4 | ON: 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 |
| J5 | Fixed (Note 2) |
| J6 | Fixed (Note 3) |
| J7 | Fixed (Note 3) |
| JG | ON: Connect shield ground to signal ground |
Table 1
| Baud Rate | SW1-5 | SW1-6 | SW2-1 | SW2-2 |
|---|---|---|---|---|
| 75 | OFF | OFF | ON | ON |
| 110 | OFF | ON | OFF | OFF |
| 134.5 | OFF | ON | OFF | ON |
| 150 | OFF | ON | ON | OFF |
| 200 | OFF | ON | ON | ON |
| 300 | ON | OFF | OFF | OFF |
| 600 | ON | OFF | OFF | ON |
| 1,200 | ON | OFF | ON | OFF |
| 1,800 | ON | OFF | ON | OFF |
| 2,400 | ON | ON | OFF | OFF |
| 4,800 | ON | ON | OFF | ON |
| 9,600 | ON | ON | ON | OFF |
| 19,200 | ON | ON | ON | ON |
| 9,600 | OFF | OFF | ON | OFF |
| 19,200 | OFF | OFF | OFF | ON |
| 38,400 | OFF | OFF | OFF | OFF |
Table 2
| Parity Check | SW1-3 | SW1-4 |
|---|---|---|
| None | OFF | OFF |
| Ignore | OFF | ON |
| Odd | ON | OFF |
| Even | ON | ON |
Table 3
| Handshaking | SW2-3 | SW2-4 |
|---|---|---|
| DTR | OFF | OFF |
| X-on/X-off | OFF | ON |
| Reserved | ON | OFF |
| Reserved | ON | ON |
Table 4
| Interface Select | SW2-5 | SW2-6 |
|---|---|---|
| RS-232D | OFF | OFF |
| RS-422A | OFF | ON |
| Current loop | ON | OFF |
| Reserved | ON | ON |
Table 5
| Vacant area for bytes | SW3-2 | SW3-3 |
|---|---|---|
| 768 | OFF | OFF |
| 1,024 | OFF | ON |
| 2,048 | ON | OFF |
| 4,096 | ON | ON |
Note: Flag reset timing is set to 32 bytes regardless of these settings when buffer operation is disabled (SW3-1 is ON)