Quatech RS-422 manual

DS C L P-2 00 /300 Two Channel RS- 422/485 Asynchronous Communications Adapte r for PCI bus User's Manual QUATECH, INC. TEL: (330) 434-3154 662 Wolf Ledges Parkway FAX: (330) 434-1409 Akron, Ohio 44311 http: //www.quatech.com[...]

? 2002 Quatech, Inc. NOTICE The information contained in this document cannot be reproduced in any form without the written consent of Quatech, Inc. Likewise, any software programs that might accompany this document can be used only in accordance with any license agreement(s) between the purchaser and Quatech, Inc. Quatech, Inc. reserves the right [...]

WARRANTY INFORMATION Quatech, Inc. warrants the DS CL P-2 00 /300 to be free of defects for fiv e ( 5 ) year s from the date of purchase. Quatech, Inc. will repair or replace any board that fails to perform under normal operating conditions and in accordance with the procedures outlined in this document during the warranty period. Any damage that r[...]

Declaration of Conformity Manufacturer's Name: Quatech Inc. M anufacturer's Address: 662 Wolf Ledges Parkway Akron, Ohio 44311 (USA) Application of Council Directive: 89/336/EEC Standards to which Conformity is Declared: * EN50081-1 (EN55022 , EN60 555-2 , EN6055 5 -3 ) * EN50082-1 (IEC 801-2, IEC 801-3, & IEC 801-4) Type of Equipment[...]

Table of Contents 28 10 Troubleshooting ................................................. 27 9 Specifications .................................................... 26 8 PCI Resource Map .............................................. 25 7.7 RS-422/485 Peripheral Connection ................................ 24 7.6 Termination Resistors ................[...]

1 General Information The Quatech, Inc. DSCLP-200/300 (two-port) and SSCLP- 200 /300 (one-port) provides upto provides two RS- 422 or RS-485 asynchronous serial communication interfaces for IBM-compatible personal computer systems using the PCI expansion bus . The DSCLP-200/300 uses Quatech's new Enhanced Serial Adapter design. Legacy serial p[...]

2 Hardware Configuration The DSCLP-200/300 is automatically configured at boot time by the computer's BIOS or operating system. There are no required switches or jumpers to set for installation. This chapter lists a number of jumper settings that control various hardware features. Jumpers J1-J4 , located in a column near the D-9 connectors, co[...]

2 . 2 Signal Connections The DSCLP-200/300 provides each of two serial ports with four differential signal pairs: TxD, RxD, AUXOUT, and AUXIN. TxD and RxD are always present at the connector. The AUXOUT and AUXIN signals can be used to support RTS/CTS handshaking, external clocking, or external signal loopback. The factory default configuration, as[...]

SPAD X4 X2 J2 J4 J5 CTS0_SEL AUX0_SEL0 AUX0_SEL1 J10 J11 J12 RCLK0_SEL TGL0_SEL0 TGL0_SEL1 J13 J14 J15 RXEN0_SEL CTS1_SEL AUX1_SEL0 J16 J17 J18 AUX1_SEL1 RCLK1_SEL TGL1_SEL0 J19 J20 J21 TGL1_SEL1 RXEN1_SEL J22 J23 Right Card Edge Jumpers 2 . 3 . 1 CTS0_SEL, CTS1_SEL (J10,17) With NO jumpers on J10 or J17 the mode selection is CTS=AU XIN. With Jumpe[...]

With NO jumpers on J13 or J20 the mode selection is RCLK=TCLK . With Jumpers installed on J13 or J20 the mode selection is RCLK = AUXIN . 2 . 3 . 4 TGL 0_SEL 1, 0 , TGL 1_SEL 1,0 (J15,14,22,21) With NO jumpers on J15,14, or J22,21 the mode selection is TXEN=1 . With Jumpers installed on J14 or J21 and NO j umpers on J15 or J22, the mode selection i[...]

SPAD X4 X2 J2 J4 J5 Figure 4 --- Enable scratchpad registers 2 . 4 . 2 Force High-Speed UART Clock (X2 or X4, J 4 -J 5 ) These jumpers force an increase of the UART input clock frequency by a factor of two, four, or eight. This feature can allow legacy software to use baud rates above 115,200 bits per second. It is also useful if the serial port de[...]

SPAD X4 X2 J2 J4 J5 X4 mode SPAD X4 X2 J2 J4 J5 X2 mode DSCL P-2 00 /300 User's Manual 7[...]

3 Hardware Installation 1. Turn off the power of the computer system in which the DSCLP-200/300 is to be installed. 2. Remove the system cover according to the instructions provided by the computer manufacturer. 3. Make any desired optional jumper setting changes. 4. Install the DSCLP-200/300 in any empty PCI expansion slot. The board should be sec[...]

4 Address Map and Special Registers This chapter explains how the two UARTs and special registers are addressed, as well as the layout of those registers. This material will be of interest to programmers writing driver software for the DSCLP-200/300. 4 . 1 Base Address and Interrupt Level (IRQ ) The base address and IRQ used by the DSCLP-200/300 ar[...]

4 . 2 Enabling the Special Registers The DSCLP-200/300 contains two unique registers, an Interrupt Status Register and an Options Register. These registers are enabled when the SPAD jumper (J13) is removed (factory default). They replace the UART Scratchpad Register on accesses to register address 7. The Interrupt Status Register and Options Regist[...]

4 . 4 Quatech Modem Control R egister The Quatech Modem Control Register can be used to setup each port. To access QMCR write a 0 xBF to the LCR(base + 3) and a 0x10 to t he Opt Reg (base+7) . This will allow the user read/write access to QMCR . The QMCR of the entire DSCLP-200/300, as shown in Figure 9 a. The individual bits are cleared as the int[...]

4 . 5 Options Register The Options Register allows software to identify the DSCLP-200/300 as a Quatech Enhanced Serial Adapter. It also allows software to set the UART clock rate multiplier. Figure 10 shows the structure of the Options Register. The powerup default of the Options Register is all bits zero. Clock rate multiplier bit 0 RR0 0 Clock ra[...]

4 . 5 . 2 Clock Rate Multiplier A standard serial port operates at a clock speed of 1.8432 MHz. In order to achieve higher data rates, Quatech Enhanced Serial Adapters can operate at two times or four times this standard clock speed. This is controlled by the clock rate multiplier bits in the Options Register. Software can determine the UART clock [...]

5 Windows Configuration s 5 . 1 Windows Mille nnium 1. After inserting the DSCLP-200/300 for the first time the "Add New Hardware Wizard" will begin. Select "Search for the best driver for your device.". Check the "Removable media" and "Specify location" box. Click the "Next" button. 3. Window will [...]

5 . 2 Windows 2000 1. After inserting a DSCLP-200/300 for the first time, the "Add New Hardware Wizard will appear at start up. C lick the "OK" button. 2. The following dialog box insert the Quatech COM CD (shipped with the device). Click the "OK" button. 4. The following dialog box will display the appropriate INF file on [...]

5 . 3 Windows 98 1. After inserting a DSCLP-200/300 for the first time, the "Add New Hardware Wizard will appear at start up. C l ick the "Next" button. 2. Select "Search for the best driver for you device". Click the "Next" button. 3. On the next dialog, select the " CD-ROM DRIVE " check box. Insert the[...]

4. The following dialog box will display the appropriate INF file on the diskette in drive. Click the "Next" button. 5. Window will copy the INF file from the diskette and display a final dialog indic ation that the process is complete. Click the "Finish" button. Windows 95 maintains a registry of all known hardware installed in[...]

2. Select the radio button for "Driver from disk provided by hardware manufacturer." Click the " OK " button to continue. 3. An "Install From Disk " dialog box should pop up . Insert the diskette with the Quatech INF files on it, select the correct drive letter, and click the "OK" button. Windows 95 automatic[...]

utility. Select Start|Help from within Windows 95 for additional information on this utility. 1. Double click the "System" icon inside the Control Panel folder. This opens up the System Properties box. 2. Click the "Device Manager" tab located along the top of the System Properties box. This lists all hardware devices registered[...]

Figure 13 --- Windows 95 Device Manager 6. The DSCLP-200/300 serial ports are also listed under the group Ports ( COM and LPT). Windows 95 does not assign COM1 - COM4 to ports addressed at nonstandard locations. The DSCLP-200/300 ports will be enumerated starting with COM5 (or higher) even if lower logical numbers are available. 7. Select any of th[...]

Figure 14 --- Windows 95 Device Manager 9. Use the Logical COM Port n ames to access the serial ports on your DSCLP-200/300 through your software applications. Note: The Logical COM Port name is assigned to your ports by Windows 95. This name is required by a Windows 95 application when accessing a particular p DSCL P-2 00 /300 User's Manual 2[...]

6 Other Operating Systems Device drivers for Windows NT and OS/2 are also available for the DSCLP-200/300. The board can be used under DOS and other operating systems as well in many circumstances. The software described below can be obtained from the Quatech web site if it did not come with the board. 6 . 1 Windows NT The Windows NT device driver [...]

Quatech's "QTPCI" utility supplies the information required when modifying the serial port settings of the applicatio n. This program should be run from real DOS , not in a Windows DOS box. Figure 15 shows the Basic Mode display for the DSCLP-200/300 after the "Q" key has been pressed. In this example, the DSCLP-200/300 use[...]

Figure 16 shows the Expert Mode display for the DSCLP-200/300 after the "Q" key has been pressed. The information from the Basic Mode display is presented along with more details such as the Vendor and Device IDs, PCI Class Code , size of memory and I/O regions, etc. Pressing the "N" key will show similar information for all non[...]

7 External Connections The DS CLP-200/300 provides four differential communication signals per channel. The two output signals are Transmit Data (TxD) and Auxiliary Output (AUXOUT). The two input signals are Receive Data (RxD) and Auxiliary Input (AUXIN). A ground signal is also provided. The available input signals for AUXIN are Clear To Send (CTS[...]

7 . 1 RTS/CTS Handshake Transmission of RTS, combined with reception of CTS, allows for hardware handshaking (data flow control) between the UART and the external device. RTS is transmitted on AUXOUT by connecting pins 4 and 5 of the jumper block. CTS is received on AUXIN by connecting pins 1 and 2 of the jumper block. If RTS/CTS handshaking is not[...]

7 . 3 XCLK This is the output clock signal used by the transmitter portion of the UART. It is generally connected to the UART's own receive clock input (RCLK). This is done by connecting pins 3 and 6 of the jumper block. If desired, XCLK can be transmitted to an external source over the AUXOUT line by connecting pins 5 and 6 of the jumper bloc[...]

7 . 5 Half-Duplex/Full-Duplex Selection Using jumper blocks J6 and J8, the transmitters and receivers of each channel can be enabled and disabled by modem control signals. This allows operation in both half-duplex or full-duplex modes. The transmit drivers can be controlled by either the Data Terminal Ready (DTR) or the Request to Send (RTS) output[...]

Full-Duplex Operation 1 2 3 6 5 4 RTS DTR Tx ENABLE Tx ENABLE Tx ENABLE Rx ENABLE Half-Duplex(DTR) Operation 1 2 3 6 5 4 RTS DTR Tx ENABLE Tx ENABLE Tx ENABLE Rx ENABLE Half-Duplex(RTS) Operation 1 2 3 6 5 4 RTS DTR Tx ENABLE Tx ENABLE Tx ENABLE Rx ENABLE Jumpers J6, J8 Figure 23 --- Half- or full-duplex selection AUXOUT AUXIN RS-422 or RS-485 Rece[...]

7 . 6 Termination Resistors Line termination resistors are provided for the input s ignals of each of the DS C LP-200/300 's RS-422/485 ports. Termi nation may be selected or removed for individual signal lines using jumper blocks J1-J4. RS-422 Rt = 100 ohm 1/2W RS-485 Rt = 120 ohm 1/2W + - RS-422/485 Receiver Rt RXD+ AUXIN+ RXD- AUXIN- or 1 2[...]

7 . 7 RS-422/485 Peripheral Connection The DS C LP-200/300 connects to peripheral equipment through two female D-9 connectors. The serial port connector definitions are listed in Figure 26 . 3 GND 9 AUXIN- 5 AUXIN+ 6 AUXOUT- 1 AUXOUT+ 8 RxD- 4 RxD+ 7 TxD- 2 TxD+ D-9 Connector Pin SignalDescription Figure 26 --- DS C LP-200/300 connector definitions[...]

8 PCI Resource Map Listed below are the PCI resources used by the DSCLP-200/300. Such information may be of use to customers writing their own device drivers or other custom software. A detailed description of the DSCLP-200/300's UARTs is available on the Quatech web site. (all numbers in hex) PCI Vendor ID: 0x135C Quatech, Inc. PCI Device ID:[...]

9 Specifications Bus interface: PCI, 32 -bit bus , 5-volt only IBM - compatible computers Dimensions: approx. 5.5 " x 3. 5 " Serial ports Controller: 16550 with 16-byte FIFOs (1675 0 with 64-byte FIFOs optional) Interface: Two female D-9 connectors Trans ceivers : S P491 or compatible Differential output: 2V min. with 50-ohm load (RS-422)[...]

10 Troubleshooting Listed here are some common problems and frequent causes of those problems. If the information here does not provide a solution, contact Quatech technical support. Any unauthorized repairs or modifications will void the DS C LP-200/300's warranty. Computer will not boot up. 1. Is the DSCLP-200/300 properly inserted? Remove t[...]

DSCL P-2 00 /300 User's Manual Revision 1.10 December 1999 P/N: 940-01 82 -1 10[...]