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vii Table of Contents
Contents
Chapter 1 Overview .......................................................... 2
1.1 Introduction ....................................................................... 2
1.2 Hardware Specifications ................................................... 5
1.3 Safety Precautions ............................................................. 7
1.4 Chassis Dimensions........................................................... 8
Figure 1.1:Chassis Dimensions for CeleronM 1GHz .... 8
Figure 1.2:Chassis for Pentium 1.8GHz or Faster CPU 9
1.5 Packing List..................................................................... 10
Figure 1.3: Accessories ................................................ 10
Chapter 2 Hardware Functionality ............................... 12
2.1 Introduction ..................................................................... 12
Figure 2.1:Front Panel of UNO-3074 .......................... 12
2.2 RS-232 Interface (COM1~COM2) ................................. 13
2.3 RS-232/422/485 Interface (COM3~COM4) .................. 13
2.3.1 16C550 UARTs with 16-byte FIFO Standard ............. 13
2.3.2 RS-422/485 Detection .................................................. 13
2.3.3 Automatic Data Flow Control Function for RS-485 ... 13
2.3.4 RS-232/422/485 Selection ........................................... 14
Figure 2.2:RS-422/485 Jumper Setting ....................... 14
Figure 2.3:RS-232 Jumper Setting ............................... 14
2.3.5 RS-485 Auto Flow/RS-422 Master/Slave Selection .... 14
Table 2.1:Auto Flow & RS-422 Slave/Masters ........... 15
2.3.6 IRQ, I/O Address and Transmission Rate Setting ....... 15
Table 2.2:IRQ Setting via Switch 1 at SW3 ................ 16
Table 2.3:Transmission Rate (Switch 2 at SW3) ......... 16
2.3.7 Termination Resistor (JP6) .......................................... 17
2.4 LAN: Ethernet Connector ............................................... 17
2.5 Onboard Isolated Digital Input........................................ 17
2.5.1 Pin Assignments .......................................................... 17
Figure 2.4:Digital Input Connector Pin Assignments .. 17
Table 2.4:Digital Input Connector Signal Description 18
2.5.2 Isolated Inputs .............................................................. 18
Figure 2.5:Isolated Digital Input Connection .............. 18
2.5.3 Interrupt Function of the DI Signals ............................ 19
2.5.4 IRQ Level .................................................................... 19
2.5.5 Interrupt Control Register ............................................ 19
Table 2.5:Interrupt Control Register Bit Map ............. 19
2.5.6 Interrupt Enable Control Function ............................... 20
Table 2.6:Interrupt Disable/Enable Control ................. 20
2.5.7 Interrupt Triggering Edge Control ............................... 20
Table 2.7:Interrupt Triggering Edge Control ............... 20
2.5.8 Interrupt Flag Bit ......................................................... 20
Table 2.8:Interrupt Flag Bit Values ............................. 20
2.6 Onboard Isolated Digital Output..................................... 21