MiniCom (OP6800) User's Manual

> ## Appendix A. Specifications

> Appendix A provides the specifications for the OP6800 and describes the conformal coating.

> ### A.1 Electrical and Mechanical Specifications

> Figure A-1 shows the mechanical dimensions for the OP6800.

> Figure A-1. OP6800 Dimensions

> NOTE | All measurements are in inches followed by millimeters enclosed in parentheses.

> Table A-1 provides the pin 1 locations for the OP6800 headers as viewed in Figure A-1.

> Table A-1. OP6800 Header J1
> Pin 1 Locations
> Header | Pin 1 (x,y) Coordinates (inches)
> J1 | (-2.101, 2.720)

> It is recommended that you allow for an "exclusion zone" of 0.25" (6 mm) around the OP6800 in all directions when the OP6800 is incorporated into an assembly that includes other components. This "exclusion zone" that you keep free of other components and boards will allow for sufficient air flow, and will help to minimize any electrical or EMI interference between adjacent boards. Figure A-2 shows this "exclusion zone."

> Figure A-2. OP6800 "Exclusion Zone"

> Table A-2 lists the electrical, mechanical, and environmental specifications for the OP6800.

> Table A-2. OP6800 Specifications
> Parameter | Specification
> Board Size | 2.60" × 3.00" × 1.10" (66 mm × 76 mm × 28 mm)
> Bezel Size | 4.50" × 3.60" × 0.23" (114 mm × 91 mm × 6 mm)
> Connectors | one RJ-45 (Ethernet) (OP6800) one 2 × 20, 0.1" pitch ribbon-cable header
> Ethernet Interface (OP6800) | Direct connection to 10Base-T Ethernet networks via RJ-45 connection
> Temperature | Operating Range: 0°C to +50°C Storage Range: -40°C to +85°C
> Humidity | 5% to 95%, noncondensing
> External Input Voltage | 9 V to 36 V DC
> Power Consumption | 1.5 W maximum
> Digital I/O | 24 digital I/O: 8 inputs (IN00-IN07): filtered pulled up, ± 36 V DC, 27 kW input impedance, switching threshold 2.4 V typical 5 inputs (IN08-IN12): filtered pulled up, ± 25 V DC, 12 kW input impedance, switching threshold 2.4 V typical 7 outputs (OUT00-OUT06): sinking, with LED indicators, +40 V DC, 200 mA maximum per channel 4 outputs (OUT07-OUT10): sinking, open collector with inductive load-protection diode built in , +40 V DC, 200 mA maximum per channel
> Microprocessor | Rabbit 2000TM
> Clock | 22.1 MHz
> SRAM | 128K, surface mount
> Flash EPROM | 256K, surface mount
> Timers | Five 8-bit timers, one 10-bit timer with two match registers, five timers are cascadable
> Serial Ports | 4 serial ports: two RS-232 or one RS-232 (with CTS/RTS) one RS-485, onboard network termination and bias resistors one 5 V CMOS-compatible programming port
> Serial Rate | Maximum standard asynchronous 230,400 bps
> LCD Panel Size | 122 × 32 graphic display
> Keypad | 7-key keypad
> Watchdog/Supervisor | Yes
> Time/Date Clock | Yes
> Backup Battery | Connection available for external battery to back up real-time clock and SRAM

> ### A.2 Conformal Coating

> The areas around the crystal oscillator and the battery backup circuit on the OP6800 module have had the Dow Corning silicone-based 1-2620 conformal coating applied. The conformally coated areas are shown in Figure A-3. The conformal coating protects these high-impedance circuits from the effects of moisture and contaminants over time.

> Figure A-3. OP6800 Areas Receiving Conformal Coating

> Any components in the conformally coated area may be replaced using standard soldering procedures for surface-mounted components. A new conformal coating should then be applied to offer continuing protection against the effects of moisture and contaminants.

> NOTE | For more information on conformal coatings, refer to Rabbit Semiconductor Technical Note 303, Conformal Coatings.

> ### A.3 Jumper Configurations

> Figure A-4 shows the header locations used to configure the various OP6800 options via jumpers.

> Figure A-4. Location of BL2100 Configurable Positions

> Table A-3 lists the configuration options.

> Table A-3. OP6800 Jumper Configurations
> Header | Description | Pins Connected | Factory Default
> JP1 | RS-485 Bias and Termination Resistors | 1-2 5-6 | Bias and termination resistors connected | ×
> 1-3 4-6 | Bias and termination resistors not connected1 |

> 1 Although pins 1-3 and 4-6 of header JP1 are shown "jumpered" for the termination and bias resistors not connected, pins 3 and 4 are not actually connected to anything, and this configuration is a "parking" configuration for the jumpers so that they will be readily available should you need to enable the termination and bias resistors in the future.

> ### A.4 Use of Rabbit 2000 Parallel Ports

> Figure A-5 shows the Rabbit 2000 parallel ports.

> Figure A-5. OP6800 Rabbit-Based Subsystems

> Table A-4 lists the Rabbit 2000 parallel ports and their use in the OP6800.

> Table A-4. Use of Rabbit 2000 Parallel Ports
> Port | I/O | Signal | Output Function State
> PA0 | Input | IN00 | Pulled up
> PA1 | Input | IN01 | Pulled up
> PA2 | Input | IN02 | Pulled up
> PA3 | Input | IN03 | Pulled up
> PA4 | Input | IN04 | Pulled up
> PA5 | Input | IN05 | Pulled up
> PA6 | Input | IN06 | Pulled up
> PA7 | Input | IN07 | Pulled up
> PB0 | Input | IN08 | Pulled up
> PB1 | Input | Not Used | Pulled up
> PB2 | Input | IN09 | Pulled up
> PB3 | Input | IN10 | Pulled up
> PB4 | Input | IN11 | Pulled up
> PB5 | Input | Connected to PB7 | Driven by PB7
> PB6 | Output | Not Used | Low
> PB7 | Output | Connected to PB5 | Low
> PC0 | Output | TXD RS-485 | Serial Port D | Inactive high
> PC1 | Input | RXD RS-485 | Inactive high
> PC2 | Output | RTS/TXC RS-232 | Serial Port C | Inactive high
> PC3 | Input | CTS/RXC RS-232 | Inactive high
> PC4 | Output | TPOUT- (Realtek reset) |  | Initialized by sock_init
> PC5 | Input | TPOUT+ (Realtek INT0) |  | Pulled up
> PC6 | Output | TXA Programming Port | Serial Port A | Inactive high
> PC7 | Input | RXA Programming Port | Pulled up
> PD0 | Input Output | Realtek CLK (OP6800) Not used (OP6810) | Initialized by sock_init Low
> PD1 | Input Output | Realtek SDO (OP6800) Not used (OP6810) | Initialized by sock_init Low
> PD2 | Output | Not used | Low
> PD3 | Output | OUT07 | Low (output driver off)
> PD4 | Output | ATXB RS-232 | Serial Port B | Inactive high
> PD5 | Input | ARXB RS-232 | Inactive high
> PD6 | Output | Not used | Low
> PD7 | Output | Not used | Low
> PE0 | Output | RS-485 control register | Low (Tx disabled)
> PE1 | Output | OUT08 | Low (output driver off)
> PE2 | N/A Output | Realtek IORB strobe (OP6800) Not used (OP6810) | Initialized by sock_init Low
> PE3 | N/A Output | Realtek SDI line (OP6800) Not used (OP6810) | Initialized by sock_init Low
> PE4 | Input | OUT09 | Low (output driver off)
> PE5 | Input | OUT10 | Low (output driver off)
> PE6 | N/A Output | Realtek IOWB strobe (OP6800) Not used (OP6810) | Initialized by sock_init Low
> PE7 | Output | LCD_KEYPAD strobe | Inactive high

> ### A.5 I/O Address Assignments

> Table A-5 lists the external I/O addresses for the display and keypad I/O.

> Table A-5. Display and Keypad Output Addresses
> External Address | Name | Function
> E000-E007 | LCD | LCD control
> E008 | EN | Output enable for LEDs
> E00A | KPEN | Read keypad and IN12
> E00B | LED | LED0-LED6 and LCD backlight

> PE7 serves as a system-enable control and LCD/keypad strobe. When PE7 is high or in a high-impedance status, all OP6800 outputs are disabled (digital outputs and display outputs are disabled, and RS-485 is at listen status).

Z-World http://www.zworld.com Voice: (530) 757-3737 FAX: (530) 757-3792 sales@zworld.com