19-6319; Rev 0; 5/12 MAX3232PMB1 Peripheral Module General Description The MAX3232PMB1 peripheral module provides the necessary hardware to interface the MAX3232E true RS-232 transceiver to any system that utilizes PmodTMcompatible expansion ports configurable for UART communication. The IC has two receivers and two transmitters that are used to implement RS-232 data transmit and receive channels along with optional CTS and RTS handshaking. The RS-232 side input and output levels are true RS-232, achieved by incorporation of a dual internal charge pump. Refer to the MAX3232E IC data sheet for detailed information regarding operation of the IC. Features S Transmitter Output and Receiver Inputs Protected to Q15kV S Implements RS-232 DCE S True RS-232 Levels from Single 3.3V Supply S 6-Pin Pmod-Compatible Connector (Pmod Interface Type 4 UART) S RoHS Compliant S Proven PCB Layout S Fully Assembled and Tested Ordering Information appears at end of data sheet. MAX3232PMB1 Peripheral Module Pmod is a trademark of Digilent Inc. __________________________________________________________________ Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. MAX3232PMB1 Peripheral Module Component List DESIGNATION C1 QTY 1 DESCRIPTION DESIGNATION QTY DESCRIPTION JP1 1 4-pin (2 x 2) straight male header R1–R4 4 150I Q5% resistors (0603) 1 3.0V to 5.5V RS-232 transceiver (16 TSSOP) Maxim MAX3232EEUE+ 2.2FF Q10%, 10V X5R ceramic capacitor (0603) TDK C1608X5R1A225K/0.80 C2–C6 5 0.1FF Q10%, 16V X7R ceramic capacitors (0603) Murata GRM188R71C104KA01D U1 — 2 Shorting jumper J1 1 6-pin right-angle male header — 1 PCB: EPCB3232PM1 1 Right-angle DB9 female connector J2 Component Suppliers SUPPLIER PHONE WEBSITE Murata Electronics North America, Inc. 770-436-1300 www.murata-northamerica.com TDK Corp. 847-803-6100 www.component.tdk.com Note: Indicate that you are using the MAX3232PMB1 when contacting these component suppliers. Detailed Description UART Interface The MAX3232PMB1 peripheral module can interface to the host by plugging directly into a Pmod-compatible port (configured for UART) through connector J1. J1 provides connection of the module to the Pmod host. The pin functions and pin assignments adhere to the Pmod UART Type 4 standard recommended by Digilent. See Table 1. This J2 connector is meant to interface to a data terminal (DTE) through a standard RS-232 cable or a DCE device through a null-modem RS-232 cable. See Table 2. Table 1. Connector J1 (UART Communication) PIN SIGNAL CTS-H 2 TXD-H Host transmit. This pin carries the transmit data from the Pmod system UART transmitter to a connected DTE receiver. 3 RXD-H Host receive. This pin carries the receive data from the connected DTE transmitter to the Pmod system’s UART receiver. 4 RTS-H Ready to send. This pin carries the ready to send signal from the Pmod system to a connected DTE. 5 GND Ground 6 VCC Power supply 1 Jumper JP1 (CTS/RTS) This jumper port allows CTS and RTS to be passed through, looped back, or disconnected from the local and remote system. In most applications, these jumpers should be set in pass-through mode with pins 1-2 and 3-4 shorted. DESCRIPTION Clear to send. This pin carries the clearto-send signal from the connected DTE to the Pmod system. __________________________________________________________________ Maxim Integrated Products 2 MAX3232PMB1 Peripheral Module Table 2. Connector J2 (Female DB9) PIN SIGNAL DESCRIPTION 1 DCD Carrier detect. Carrier detect is shorted to pins 1, 4, and 6. 2 TXD RS-232 transmit from Pmod system to the DTE 3 RXD RS-232 receive from the DTE to the Pmod system 4 DTR Data terminal ready. Shorted to pins 1, 4, and 6. 5 GND RS-232 signal and shield ground 6 DSR Data set ready. Shorted to pins 1, 4, and 6. 7 CTS Clear to send. CTS from DTE to the Pmod system. 8 RTS Ready to send. RTS from Pmod system to the DTE. 9 RI Ring indicator. Not connected. Software and FPGA Code Example software and drivers are available that execute directly without modification on several FPGA development boards that support an integrated or synthesized microprocessor. These boards include the Digilent Nexys 3, Avnet LX9, and Avnet ZEDBoard, although other platforms can be added over time. Maxim provides complete Xilinx ISE projects containing HDL, Platform Studio, and SDK Projects. In addition, a synthesized bit stream, ready for FPGA download, is provided for the demonstration application. The software project (for the SDK) contains several source files intended to accelerate customer evaluation and design. These include a base application (maximModules.c) that demonstrates module functionality and uses an API interface (maximDeviceSpecific Utilities.c) to set and access Maxim device functions within a specific module. The source code is written in standard ANSI C format, and all API documentation including theory/operation, register description, and function prototypes are documented in the API interface file (maximDeviceSpecificUtilities.h & .c). The complete software kit is available for download at www.maxim-ic.com. Quick start instructions are also available as a separate document. __________________________________________________________________ Maxim Integrated Products 3 1 2 3 4 5 6 J1 150 150 R3 R4 150 R2 C1 2.2uF GND VCC GND C2 .1uF VCC "Pmod" is a trademark of Digilent, Inc. Follows Digilent Pmod Interface Type 4 (UART) pinout convention CTS-H TXD-H RXD-H RTS-H GND VCC 150 1 3 JP1 2 4 C4 C3 .1uF .1uF 5 4 3 1 9 12 10 11 C2- C2+ C1- C1+ R2out R1out T2in T1in U1 VCC 16 VCC GND GND 15 R1 V- V+ R2in R1in T2out T1out MAX3232 RXD CTS 13 8 6 C5 .1uF RTS 7 2 TXD 14 C6 .1uF GND S1 S2 1 6 2 7 3 8 4 9 5 J2 TXD CTS RXD RTS MAX3232PMB1 Peripheral Module Figure 1. MAX3232PMB1 Peripheral Module Schematic __________________________________________________________________ Maxim Integrated Products 4 MAX3232PMB1 Peripheral Module Figure 2. MAX3232PMB1 Peripheral Module Component Placement Guide—Component Side Figure 3. MAX3232PMB1 Peripheral Module PCB Layout—Component Side __________________________________________________________________ Maxim Integrated Products 5 MAX3232PMB1 Peripheral Module Figure 4. MAX3232PMB1 Peripheral Module PCB Layout—Inner Layer 1 (Power) Figure 5. MAX3232PMB1 Peripheral Module PCB Layout—Inner Layer 2 (Ground) __________________________________________________________________ Maxim Integrated Products 6 MAX3232PMB1 Peripheral Module Figure 6. MAX3232PMB1 Peripheral Module PCB Layout—Solder Side Figure 7. MAX3232PMB1 Peripheral Module Component Placement Guide—Solder Side __________________________________________________________________ Maxim Integrated Products 7 MAX3232PMB1 Peripheral Module Ordering Information PART TYPE MAX3232PMB1# Peripheral Module #Denotes RoHS compliant. __________________________________________________________________ Maxim Integrated Products 8 MAX3232PMB1 Peripheral Module Revision History REVISION NUMBER REVISION DATE 0 5/12 DESCRIPTION Initial release PAGES CHANGED — Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2012 Maxim Integrated Products 9 Maxim is a registered trademark of Maxim Integrated Products, Inc.