NXP Semiconductors SC16IS750 760 Demo Board User Manual

NXP Semiconductors SC16IS750 760 Demo Board

Product Information

Specifications

• Product Name: SC16IS750/760 demo board
• Model Number: UM11988
• Interface: I2C-bus/SPI to UART bridge
• Manufacturer: NXP Semiconductors
• Revision: 2.0
• Date: 6 February 2024

Product Usage Instructions

Getting Ready
Working with the SC16IS750/760 demo board requires the following:

• Kit contents
• Additional hardware
• Windows PC workstation with installed software

Getting to Know the Hardware
The demo board schematic provides detailed information on the board’s components and connections.

Configuring the Hardware
When using an external controller, follow these steps:

1. If U7 is removed, create a ribbon cable to connect the external controller’s I2C or SPI bus to the demo board.
2. This setup allows direct control of the SC16IS750/760 with the external controller and facilitates software development without modifying the existing system.

Demo Modes
The demo modes can be selected using jumper JP8 pin 1 and 2 (IO3) on the demo board:

• If the jumper is missing, data path is between IrDA port and uC serial port.
• If the jumper is installed, the board is in software loop back mode.

Demo Modes Setup Instructions

1. IrDA Demo:
2. Download PCRemoteControl from www.pcremotecontrol.com.
3. Install the program on your PC.
4. Run the program.
5. Open the file: Philips_Universal.pcr on the disk.

FAQ

Q: What are the demo modes available on the SC16IS750/760 demo board?
A: The demo modes include IrDA demo and software loop back mode. Refer to section 5.1 for detailed instructions on setting up these modes.

Document information

demo board
Abstract| The SC16IS750/760 is a slave I2C-bus/SPI interface to a single- channel high performance UART. This user manual describes the setup, configuration and operation of the OM6270 (SC16IS750/760 SPI/I2C to UART bridge demo board)

NXP Semiconductors

IMPORTANT NOTICE

For engineering development or evaluation purposes only
NXP provides the product under the following conditions:
This evaluation kit is for use of ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY. It is provided as a sample IC pre-soldered to a printed circuit board to make it easier to access inputs, outputs and supply terminals. This evaluation board may be used with any development system or other source of I/O signals by connecting it to the host MCU computer board via off-the-shelf cables. This evaluation board is not a Reference Design and is not intended to represent a final design recommendation for any particular application. Final device in an application heavily depends on proper printed-circuit board layout and heat sinking design as well as attention to supply filtering, transient suppression, and I/O signal quality. The product provided may not be complete in terms of required design, marketing, and or manufacturing related protective considerations, including product safety measures typically found in the end device incorporating the product. Due to the open construction of the product, it is the responsibility of the user to take all appropriate precautions for electric discharge. In order to minimize risks associated with the customers’ applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. For any safety concerns, contact NXP sales and technical support services.

Introduction

The SC16IS750/760 is a slave I2C-bus/SPI interface to a single-channel high performance UART. It offers data rates up to 5 Mbit/s and guarantees low operating and sleeping current. The SC16IS750 and SC16IS760 also provide the application with 8 additional programmable I/O pins. The device comes in very small HVQFN24, TSSOP24 (SC16IS750/760) packages, which makes it ideally suitable for handheld, battery operated applications. This family of products enables seamless protocol conversion from I2C-bus or SPI to and RS-232/RS-485 and are fully bidirectional.

Finding kit resources and information on the NXP website

NXP Semiconductors provides online resources for this evaluation board and its supported device(s) on http://www.nxp.com.
The information page for the OM6270 (SC16IS750/760 demo board) is at https://www.nxp.com/products/analog-and-mixed-signal/bridges/spi-ic-to-uart- bridge-demo-board-sc16is750:OM6270.

Getting ready

Working with the OM6270 (SC16IS750/760 demo board) requires the kit contents, additional hardware, and a Windows PC workstation with installed software.

Kit contents
Assembled and tested evaluation board in an antistatic bag

Getting to know the hardware

Schematic

Configuring the hardware

The demo board has an on board microcontroller (U7) which is used to control the SC16IS750/760 through the microcontroller I2C bus. This microcontroller is configured at power up to receive the data through the IrDA port (U10), and the received data are sent back out through the uC’s UART port (P2). The on- board microcontroller can be removed from its socket; this allows the SC16IS750/760 to be controlled through the SPI header (JP1) or the I2C header (JP6). Please refer to the schematics for more detail of the headers’ pin map. When the external controller is selected (U7 is removed), a ribbon cable can be made to connect the external controller’s I2C or SPI bus to the demo board. This option allows the user to control the SC16IS750/760 directly with the external controller, and it also allows the user to quickly develop his software without modify his system to add the 16IS750/760 and the necessary components.

Demo modes
The demo modes can be choose by the jumper on JP8 pin 1 and 2 (IO3). If the jumper is missing the datapath is between IrDA port and uC serial port. In this mode if any data received by SC16IS750/760 through the IrDA port will be send out to P2.
If the jumper is installed between JP8 pin 1 and 2, the SC16IS750/760 is in software loop back mode. Any data received through P1 will be read by the on- board uC and the uC automatically sends the data back to P1 port.

Demo modes setup instructions

1. IrDA demo
2. Get this shareware program – PCRemoteControl from this website: www.pcremotecontrol.com
3. Install the shareware program on your PC
4. Run the program.
5. Open the file: Philips_Universal.pcr on the disk
6. Change the baud rate to 19.2 Kbps and other settings exactly as shown below (Setting # Original of control # Properties) and click on Accept.
7. Click on RUN
8. Connect the serial cable between P2 port of the demo board and your PC’s serial port.
9. Remove jumper on JP8 between pin 1 and 2 (put it on JP8 pin 1 only for later use).
10. Make sure there is no jumper on JP18, and the jumper is on JP20.
11. Power up the demo board – plug in the power jack.
12. Open the Microsoft PowerPoint Program.
13. Open any presentation file
14. Point the remote control at the demo board’s IrDA port and press Channel UP or Channel Down key, the Power Point pages will be flipped forward or backward.
15. Serial port demo
16. Connect the serial cable between P1 of the demo board and you PC
17. Open HyperTerminal program
18. Change the Baud Rate to 115.2Kbps if needed
19. Put a jumper on JP8 pin 1 and 2
20. Make sure the jumper is on JP18, and there should be no jumper on JP20
21. Power up the demo board – plug in the power jack
22. Send any text file (the one on the disk can also be used) and the text will be automatically sent back from the on-board microcontroller.

SC16IS750/760 address section
This device can be configured as any of the following 16 I2C addresses by installing the jumpers:

Table 1. Address Section

I2C or SPI configuration
The on-board microcontroller is programmed to control the SC16IS750/760 through I2C bus. But if the 16IS750/760 is to be controlled by an external controller through either JP1 or JP6 then the controlled bus is selectable by JP2.
I2C bus is selected by installing the jumper on pin 1 and 2 of JP2, and SPI bus is selected by installing the jumper on pin 2 and 3 of JP2. e

Modem pins or I/O pins

• Four of the 16IS750/760 I/O pins can also be programmed as normal I/O pins. When these pins are programmed as modem pins, they are routed to the serial port through JP5. This requires the jumper to be on pin 1 and 2 of JP5. When these four pins are
• programmed as I/O pins, they are routed to JP7 through JP5. This requires the jumper to be on pin 2 and 3 of JP5.
• In addition, there are 8 LEDs on boards and can be turned on or off by the SC16IS750/760 I/O pins when programmed as outputs.

Modem port, IrDA or RS-485 port
On this board the SC16C750/760 receiver pin can be routed from one of these three sources: IrDA Port (U10), Serial Port (P1) or RS-485 Port (JP14). Please see the table below:

Table 2. Receiver pin routing

JP18| JP20| JP19|
---|---|---|---
ON| OFF| OFF| Receive from Serial Port
OFF| ON| OFF| Receive from IrDA Port
OFF| OFF| ON| Receive from RS-485 Port

The transmitter pin from SC16C750/760 goes to all three ports, and there is no option to isolate them.

Power supply options
The demo board is normally powered from a 5V-7.5V DC adapter which plugs into the power jack J5. This option requires the jumper JP17 to be installed. Additionally, a 3.3V external power source can be used to supply power to the demo board. This option requires the jumper on JP17 to be removed and the external 3.3V power is connected to JP17 pin 1.

SC16IS750/760 hardware reset options
SC16C750/760 can be manually reset with the push switch (S1) or through the on-board uC (U7 pin25). The factory default is with the S1 switch, therefore, JP16 jumper is installed on pin 2 and 3.

Revision history

Table 3. Revision history

user manual to current format set forth by NXP

Legal information

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Please be aware that important notices concerning this document and the product(s) described herein, have been included in section ‘Legal information’.© 2024 NXP B.V. For more information, please visit: https://www.nxp.com
All rights reserved.Date of release: 6 February 2024 Document identifier: UM11988

References

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