2-PORT RS-232/422/485 PCI HOST ADAPTER
Appendix E: Board Layout
| 7201 |
| • JxB JUMPER SETTINGS • |
| U6 |
|
|
|
| Y1 |
| |||||
|
| RS422 - REMOVE ALL JUMPERS |
|
|
|
|
|
|
|
|
| |||||
C1 |
| R1 | RS485 - AT= AUTO ENABLE |
|
| C10 |
|
|
|
|
|
| ||||
| RS485 - RT= RTS ENABLE |
|
|
|
|
|
|
|
| |||||||
|
|
|
|
|
|
|
|
|
|
|
|
| ||||
U1 GD75232 | R2 | RS485 - NE= NO ECHO |
|
| R29 |
|
|
|
|
|
| |||||
|
|
| J2B |
|
|
|
|
|
|
| C12 | |||||
C2 | R8 | C4 J1B |
|
|
|
| R30 | J1C | J2C | |||||||
Port 1 J1 |
|
| AT RT NE | AT RT NE |
|
| C13 | |||||||||
|
|
|
|
|
| C5 |
|
|
|
|
|
|
|
| + | |
RS232 |
| HEADER24PINW |
| E1 |
|
| C11 | DIV1 | DIV2 | DIV4 | DIV1 | DIV2 DIV4 | C14 | |||
|
| R16 R20 R24 | ||||||||||||||
|
|
|
| 1 |
| |||||||||||
|
|
|
|
| Port |
|
|
| Port 1 |
|
|
| Port 2 |
| ||
RS422 |
|
|
|
|
| R17 R21 R25 |
|
|
|
|
|
|
|
| ||
| HEADER24PINW |
| E2 | R18 R22 R26 |
|
|
|
|
|
|
|
| ||||
|
|
|
|
|
|
| E5 |
|
|
|
| E6 | ||||
| C3 R4 R5 R8 R9 R10 | R11 |
|
|
|
|
|
| ||||||||
|
|
|
|
|
|
|
|
|
| |||||||
| R3 R5 R7 |
|
| R12U4 75174 |
|
|
|
|
|
|
|
|
| |||
|
| J1A |
|
|
|
|
|
|
|
|
|
| ||||
|
|
| R13 |
|
|
|
|
|
|
|
|
| ||||
Port 2 J2 |
|
| P P T L L |
| U7 16550 PLCC |
| U9 | 16550 PLCC | ||||||||
|
|
|
| R14 | C7 |
|
|
|
|
|
| R31 |
| |||
U2 GD75232 |
|
|
|
|
|
|
|
|
| |||||||
|
| J2A |
|
|
| U4 75175 | R27 |
|
|
|
|
|
| C15 |
| |
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
| P P T L L | R15 | R28 |
|
|
|
|
|
| • JxC - CLOCK DIV • | ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
|
| R19 R23 |
|
|
|
|
|
| DIV1= DIVIDE BY 1 | ||
RS232 |
|
|
|
|
|
|
|
|
|
|
|
|
| |||
| HEADER24PINW |
| E3 | C8 |
|
|
|
|
|
| DIV2= DIVIDE BY 2 | |||||
|
|
| PCI9050 |
|
|
| DIV4= DIVIDE BY 4 | |||||||||
|
|
|
| 2 |
|
|
|
|
|
|
|
|
| PORT1= J1x | ||
|
|
|
|
| Port | U5 93CS46 |
|
|
|
|
|
|
| |||
RS422 |
|
|
|
|
|
|
|
|
|
|
| PORT2= J2x | ||||
|
|
|
|
|
|
|
|
|
|
|
|
|
|
| ||
| HEADER24PINW |
| E4 |
|
|
|
|
|
|
|
|
|
| |||
|
|
|
|
|
| C6 |
|
|
|
|
|
|
| MADE IN USA | ||
|
|
|
|
|
|
|
|
|
|
|
|
|
| |||
|
|
|
| • JxA JUMPER SETTINGS • | C9 |
|
|
|
|
|
| C16 | C17 | |||
|
|
|
| P= PULL UP/DOWN ENABLE |
| U8 |
|
|
|
| ||||||
|
|
|
| T= TERMINATION ENABLE |
|
|
|
|
| P1 |
|
| ||||
|
|
|
| L= CONNECT RX TO TX |
|
|
|
|
|
|
|
| ||||
Figure E-1. Board layout.
32