80-000541
80-000541 Datasheet
80-000541
| Part | Datasheet |
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80-000541 |
80-000541 (pdf) |
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| Critical Link, LLC FEATURES • 1 RS-232 Compliant Output • 1 RS-232 Compliant Input • RS232 Protocol - Up to 115,200 baud rate • On-Board TX/RX Output Swapping - Resistor changeable • Compatible with MityARM/MityDSP based Development Kits from Critical Link RS232 Expansion Kit 17 October 2012 Applications • External Hardware Interfacing • Embedded Instrumentation x actual size DESCRIPTION The RS232 Expansion Kit is compatible with Critical Link’s line of MityARM/MityDSP based development kits one is required to interface with this expansion kit. All MityARM/MityDSP based System on Modules support RS232, see Table 1 for details concerning SoM support. Table 1 Critical Link SoM RS232 Support Module Type RS232 Support MityARM-1810 MityARM-1810F MityDSP-L138 MityDSP-L138F MityARM-1808 MityARM-1808F MityARM-3359 Copyright 2007-2012, Critical Link LLC Critical Link, LLC RS232 Expansion Kit 17 October 2012 RS232 Description The RS232 Expansion Kit provides standard serial interface at data rates up to 115,200 baud that can be seamlessly added to your design. The serial interface is routed to one of the UART ports of the MityARM / MityDSP through the UART Expansion Header on a MityARM/MityDSP based Development Kit. Linux Driver and API examples are available. The level conversion from the input CMOS levels to the output RS232 levels is done by a MAX3232IDR Line Driver/Receiver. This part offers two receivers and drivers but the second set is unused on this board. Through the use of 4 resistors the RS232 Expansion Kit can alter which output pins are used for TX and RX depending if a null-modem or standard cable type is necessary. See Table 4 for details. The electrical interface between the RS232 Expansion Kit and MityARM/MityDSP based Development Kit is provided via the 10-pin shrouded header described in Table The electrical interface between the RS232 Expansion Kit and an external device is provided via the 9-pin DB9 connector described in Table Please reference your specific MityARM/MityDSP Based Development Kit documentation to determine which connector to use for the RS232 Expansion Kit. Copyright 2007-2012, Critical Link LLC Critical Link, LLC RS232 Expansion Kit 17 October 2012 RS232 Expansion Kit Pinouts Table 2 shows the input 10-pin shrouded header pin out for the RS232 Expansion Kit input header. This connector, J501, is the interface to the MityARM/MityDSP based development kit. Table 2 PROFIBUS/RS485 Expansion Kit 10-Pin Header Pin Out Name Type Note 1 ENB 3.3V CMOS Unused - Input to Expansion 2 RXD ORDERING INFORMATION The following table lists the orderable module configurations. For shipping status, availability, and lead time of these or other configurations please contact your Critical Link representative. The necessary 10-pin cable to connect to a MityARM/MityDSP based Development Kit is provided with each RS232 Expansion Kit. Table 5 Orderable Model Numbers Model Protocol s Supported 80-000541 RS232 MECHANICAL INTERFACE A mechanical outline of the RS232 Expansion Board is illustrated below. Figure 1 Dimensions x Date 10-OCT-2012 17-OCT-2012 Copyright 2007-2012, Critical Link LLC |
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