Quatech DS-200/300 manuale d’uso

DS-200/300 Two Channel RS-422/485 Asynchronous Enhanced Serial Adapter for ISA compatible machines User's Manual QUATECH, INC. TEL: (330) 655-9000 5675 Hudson Industrial Parkway FAX: (330) 655-9010 Hudson, Ohio 44236 http://www.quatech.com INTERFACE CARDS FOR IBM PC/AT AND PS/2[...]

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Warranty Information Quatech In c. w arrants th e D S- 2 00/300 to be f ree of def ect s f or on e (1) year from the date of purchase. Quatech In c. will repair or replace an y adapter that fails to perform unde r norm al opera ting conditio ns and in accordan ce with the procedures o utlined in this document during the warranty period. Any damage [...]

© 1998, Quatech, Inc. NOTICE The information contained in this document cannot be reproduced in any form without the written consent of Qu atech, Inc. L ikewise, any software programs that might accompany this document can be used only in accordance with any license agreement(s) between the purchaser and Quatech, I nc. Quatech, I nc. reserves the [...]

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Table of Contents 9-1 9. Troubleshooting ......................................... 8-1 8. Specifications ............................................ 7-6 7.8 RS-422/485 Peripheral Connection ................................................. 7-6 7.7 Termination Resistors ..................................... 7-5 7.6 Factory Default Configuration of [...]

1. General Information The Quatech, Inc. DS-200/300 provides two RS-422/RS-485 asynchronous serial communication interfaces for IBM-compatible personal computer systems using the 16-bit ISA (Industry Standard Architecture) expansion bus. The DS-200/300's serial ports are implemented using 16550 or 16750 Universal Asynchronous Receiver/Transmit[...]

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2. Installation If the default address and interrupt settings are sufficient, the DS-200/300 can be quickly installed and put to use. The factory defaults are listed in Figure 1 . YES 3 2F8 hex Serial 1 YES 4 3F8 hex Serial 0 ENABLED IRQ ADDRESS PORT Figure 1 --- Default address and IRQ settings for DS-200/300 The output of the DS-200/300 is two 9-[...]

Figure 2 --- Photo of DS-200/300 2-2 Quatech Inc.[...]

3. Windows 95 Configuration Windows 95 maintains a registry of all known hardware installed in your computer. Inside this hardware registry Windows 95 keeps track of all of your system resources, such as I/O locations, IRQ levels, and DMA channels. The "Add New Hardware Wizard" utility in Windows 95 was designed to add new hardware and up[...]

4. A hardware types list box should appear. Find the “ Multi-function Adapters” type on the list and click it. Click the “Next” button to continue. 5. A list box opens with Manufacturers on the left and the associated board Models on the right. Click the “Have Disk” button. 6. An Install From Disk dialog box should pop up. Insert the di[...]

10. Another dialog box will open to tell you that the installation is complete. Click the “Finish” button to end the software part of the installation. 11. Windows 95 now instructs you to shut down your computer and install the hardware. Click “Yes” to shut down your computer. Wait until Windows 95 informs you that it is safe to turn your c[...]

Figure 3--- Windows 95 Device Manager 4. Double click the DS-200/300 Enhanced Serial Adapter model name and a properties box should open for the hardware adapter. 5. Click the “Resources” tab located along the top of the properties box. Confirm that the resources Windows 95 has allocated for the D S-200/300 match the hardware configuration. To [...]

7. The DS-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 D S-200/300 ports will be enumerated starting with COM5 (or higher) even if lower logical numbers are available. 8. Select any of the Quatech Serial Ports listed under the group [...]

4. Addressing Ports 4.1 Setting the address The base address of each port of the DS-200/300 is set using two DIP switch packs. When setting the address selection switches, a switch in the "ON" position specifies that the corresponding address line must be a logic 0 for the port to be selected. Similarly, a switch in the "OFF" po[...]

Switch on bit = 0 Switch off bit = 1 Serial 0 uses SW1 and SW2 Serial 1 uses SW3 and SW4 ON 123456 78 8 82 1 F 4 8 123456 ON 02 1 3 0 00 0 0 0 SW 1 SW 2 enable/ disable ON 123456 78 8 82 1 F 4 8 123456 ON 02 0 2 0 00 0 0 0 SW 3 SW 4 Factory default setting for Serial 2 --- 02F8 hex (COM2) ON 123456 78 8 82 0 E 4 8 123456 ON 02 1 3 0 00 0 0 0 Exampl[...]

The standard addresses for serial ports COM1 and COM2 are listed in Figure 7. Recommended addresses for serial ports COM3 and COM4 are also listed. The switch settings for these addresses are shown in Figure 6. 02E8 hex COM4 Recommendations only. No official standards exist for COM3 and COM4. 03E8 hex COM3 Factory default for Serial 1. 02F8 hex COM[...]

5. Data Rate Multiplier A standard RS-422/485 serial port operates at a clock speed of 1.8432 MHz. In order to achieve higher data rates, the DS -200/300 Enhanced Serial Adapter can operate at two times, four times (16750 UART only), or even eight times (16750 UART only) this standard clock speed . The user can set this speed, known as the data rat[...]

rate register bit 0 RR0 0 rate register bit 1 RR1 1 not used OR2 2 not used OR3 3 not used OR4 4 not used OR5 5 Figure 9--- Options Register bit definitions 0 1 1 1 1 0 0 1 1 0 1 0 0 0 0 0 ID0 ID1 ID0 ID1 READ WRITE Figure 10 --- ID bit write/read table The rate register allows software applications to check and set the data rate multiplier. As lon[...]

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6. Interrupt Level (IRQ) The DS-200/300 allows the use of any interrupt level in the range IRQ2 to IRQ7, IRQ10 to IRQ12, IRQ14, or IRQ15, selected using jumper block J3 (for Serial 0) or J4 (for Serial 1). In Figure 12 , the factory default settings for Serial 0 and Serial 1 are shown. To select a different IRQ, move the jumper to the appropriate p[...]

6.1 Interrupt Sharing Both ports on the DS-200/300 can share the same interrupt leve l or they can share their interrupt with another Quatech adapter supporting sharable interrupts. Jumper J2 can be used to connect the UART generated interrupt directly to the selected IRQ or to enable the interrupt sharing circuit. In either case, the software driv[...]

6.2 Interrupt Status Register The DS-200/300 is equipped with an I nterrupt Status Register (ISR) which can be used to simplify the servicing of shared interrupts. This register is located at [base address+7] along with the Options Register . Like the OR, the SP jumper must be removed to access the ISR. To further indicate an access to t his regist[...]

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7. Output Configuration The DS-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 DS-200/300 allows the user to select whether ha ndshaking s[...]

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 pack. CTS is received on AUXIN by connecting pins 1 and 2 of the jumper pack. If RTS/CTS handshaking is not des[...]

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 pack. If desired, XCLK can be transmitted to an external source over the AUXOUT line by connecting pins 5 and 6 of the jumper pack. Figure 19 [...]

7.5 Half Duplex/Full Duplex selection Using jumper packs J6 and J8, the channels can be configured to operate in half duplex mode. This causes the transmitters to be controlled by either the Data Terminal Ready (DTR) or the Request to Send (RTS) output from the UART. In half duplex mode, if the UART signal (DTR or RTS) is asserted (logic 1), the tr[...]

1 3 2 5 4 6 XCL K RTS CTS RCLK DTR DSR DCD RI AUX OUT RS-422 or RS-485 Driver + - AUX IN RS-422 or RS-485 Receiver + - 1 3 2 5 4 6 -1 TXEN RXEN Figure 22 --- Output control block diagram 7.6 Factory Default Configuration of DS-200/300 The DS-200/300 is shipped from the factory with each channel configured as shown in Figure 23. 1 3 2 6 5 7 AUX OUT [...]

7.7 Termination Resistors Optional line termination resistors are provided for the input s ignals of each of the DS-200/300’s RS-422/485 ports. The user has the option of selecting RS-422 termination ( 100W ), RS-485 termination (120 W ), or no termination. Line termination may be selected or removed using jumper block J1. The board is shipped wi[...]

Auxiliary channel input (negative) AUXIN- 9 Serial data input (negative) RXD- 8 Serial data output (negative) TXD- 7 Auxiliary channel output (negative) AUXOUT- 6 Auxiliary channel input (positive) AUXIN+ 5 Serial data input (positive) RXD+ 4 Chassis ground GND 3 Serial data output (positive) TXD+ 2 Auxiliary channel output (positive) AUXOUT+ 1 DES[...]

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8. Specifications BAUD RATES: 921.6 kbps with 16750 UARTs 230.4 kbps with 16550 UARTs UARTs: Two 16550 UARTs with 16-byte FIFOs or two 16750 UARTs with 64 byte FIFOs TRANSCEIVERS: MAX491 or compatible DRIVER RISE OR FALL TIME: 5 ns minimum 15 ns typical 25 ns maximum MAXIMUM DATA RATE: 2.5 Mbps BASE ADDRESS RANGE: 0000 hex to FFF8 hex INTERRUPT OPT[...]

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9. Troubleshooting Listed here are some common problems and frequent causes of those problems. Suggestions for corrective action are given. If the information here does not provide a solution, contact Quatech Customer Service for technical support. Any unauthorized repairs or modifications will void the DS-200/300's warranty. Computer will not[...]

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DS-200/300 User's Manual Revision 3.11 March 2004 P/N: 940-0049-311[...]