Rakstore SC16IS752 Dual Channel UART Conversion Module

1. Ifihan

The Rakstore SC16IS752 is a dual-channel, high-performance Universal Asynchronous Receiver/Transmitter (UART) designed to interface with an I2C bus or SPI bus. This module provides a convenient way to add two UART ports to a microcontroller or system that primarily uses I2C or SPI for communication. It supports data rates up to 5 Mbit/s and includes eight additional programmable I/O pins, making it suitable for various embedded applications requiring serial communication expansion.

Nọmba 1: Oke view of the SC16IS752 module. This image displays the purple PCB with the SC16IS752 chip, a crystal oscillator, and various passive components. Pin headers are visible along the edges for connection.

2. Key Awọn ẹya ara ẹrọ

• Dual Full-Duplex UART channels.
• Selectable I2C bus or SPI interface for host communication.
• Iwọn iṣẹtage: 3.3 V or 2.5 V.
• Industrial temperature range: -40 °C to +95 °C.
• Fully compatible with industry standard 16C450 and equivalent UARTs.
• Baud rate support up to 5 Mbit/s in 16× clock mode.
• Automatic hardware flow control using RTS/CTS.
• Automatic RS-485 support with automatic slave address detection.
• Eight programmable I/O pins.
• RS-485 driver direction control via RTS signal, with reversal capability.
• Software reset functionality, independent of hardware reset.
• Independent enable/disable for transmitters and receivers.
• Programmable special character detection and flexible character formats (5-bit, 6-bit, 7-bit, or 8-bit characters; even, odd, or no parity; 1, 1½, or 2 stop bits).
• Line break generation and detection.
• Internal loopback mode for self-testing.
• Low sleep current (below 3.3 µA at 3.3 V).
• 5 V tolerant inputs.
• Built-in IrDA encoder and decoder supporting IrDA SIR up to 115.2 kbit/s (SC16IS762 variant).
• Automatic software flow control with programmable Xon/Xoff characters.
• 64-byte FIFO for both transmitter and receiver, with configurable FIFO levels.
• SPI Bus Function: Supports clock speeds up to 4 Mbit/s (slave mode only, SPI mode 0).
• I2C Bus Function: Noise filter on SCL/SDA input, 400 kbit/s (fast mode compatible, slave mode only).

3. Awọn alaye ọja

Nọmba 2: Close-up of the SC16IS752 chip. This image provides a detailed view of the integrated circuit, showing its markings and pins, mounted on the purple PCB.

4. Pinout aworan atọka

The module features clearly labeled pins for power, ground, I2C/SPI communication, and dual UART channels (TXA, RXA, RTSA, CTSA for channel A; TXB, RXB, RTSB, CTSB for channel B), along with general-purpose I/O (GP0-GP7) and control signals.

Nọmba 3: Pinout diagram of the SC16IS752 module. This image shows the bottom side of the PCB with all pin labels clearly printed, indicating their functions for power, communication, and control.

5. Internal Block Diagram

The internal architecture of the SC16IS752/SC16IS762 chip illustrates the I2C-bus interface, 16C450 compatible register sets for UART functionality, and a GPIO register. This diagram helps in understanding the data flow and control mechanisms within the device.

Nọmba 4: Internal block diagram of the SC16IS752/SC16IS762. This diagram illustrates the functional blocks within the chip, including the I2C-bus interface, UART register sets, and GPIO register, along with their external connections.

6. Eto ati Asopọ

To set up the SC16IS752 module, follow these general steps:

1. Ibi ti ina elekitiriki ti nwa: Connect VCC to a 2.5V or 3.3V power source and GND to ground. Ensure the power supply is stable and within the specified voltage ibiti.
2. Àṣàyàn Ìbáṣepọ̀: The module supports both I2C and SPI. The selection is typically done via specific pin configurations (e.g., I2C/SPI pin) or internal register settings. Refer to the SC16IS752 datasheet for detailed interface selection procedures.
3. Ìsopọ̀ I2C: If using I2C, connect the SCL pin to your host microcontroller's SCL line and the SDA pin to the host's SDA line. Ensure appropriate pull-up resistors are used on SCL and SDA lines if not already present on the host or module.
4. Asopọ SPI: If using SPI, connect SCLK to the host's SPI clock, SI (MOSI) to the host's MOSI, SO (MISO) to the host's MISO, and CS (Chip Select) to a dedicated GPIO on your host.
5. UART Connections: Connect the TXA/RXA and TXB/RXB pins to your desired serial devices. For hardware flow control, connect RTSA/CTSA and RTSB/CTSB accordingly.
6. GPIO Connections: The GP0-GP7 pins can be used as general-purpose digital I/O. Connect them as needed for your application.
7. Reset and Interrupt: Connect the RESET pin to a control line if a hardware reset is required. The IRQ pin provides an interrupt signal to the host microcontroller upon certain UART events.

Akiyesi: Always consult the official SC16IS752 datasheet for precise pin descriptions and recommended connection practices for your specific application.

7. Awọn ilana Iṣiṣẹ

Operating the SC16IS752 involves configuring its internal registers via the selected I2C or SPI interface. A typical operational flow includes:

1. Bibẹrẹ:
   • Perform a software reset if necessary.
   • Configure the I2C or SPI interface on your host microcontroller to communicate with the SC16IS752.
   • Set the device's I2C address or SPI chip select.
2. Iṣeto UART:
   • Select the desired UART channel (A or B).
   • Set the baud rate for each UART channel. This involves writing to the Divisor Latch Access Bit (DLAB) registers.
   • Configure character format: data bits (5-8), parity (none, even, odd), and stop bits (1, 1.5, 2).
   • Enable or disable hardware flow control (RTS/CTS) as required.
   • Configure FIFO settings, including enabling FIFOs and setting trigger levels.
3. Gbigbe Data:
   • Write data bytes to the Transmit FIFO (TX FIFO) register via the I2C/SPI interface.
   • The SC16IS752 will automatically transmit the data through the configured UART channel.
   • Monitor the Line Status Register (LSR) to check if the TX FIFO is empty or if transmission is complete.
4. Gbigba Data:
   • Received data is stored in the Receive FIFO (RX FIFO).
   • The host microcontroller can read data from the RX FIFO register via I2C/SPI.
   • Monitor the Line Status Register (LSR) or use interrupts (IRQ pin) to detect when data is available in the RX FIFO.
5. GPIO Control:
   • Configure GP0-GP7 pins as input or output by writing to the GPIO Direction Register.
   • Read or write the state of these pins using the GPIO State Register.

Pataki: Detailed register maps and programming examples are available in the SC16IS752 datasheet from the manufacturer. Software libraries may also be available for common microcontrollers.

8. Itọju

The SC16IS752 module is a robust electronic component designed for long-term operation with minimal maintenance. Follow these guidelines to ensure optimal performance and longevity:

• Awọn ipo Ayika: Operate the module within its specified industrial temperature range (-40 °C to +95 °C) and avoid excessive humidity or corrosive environments.
• Ninu: If cleaning is necessary, use a soft, dry brush or compressed air to remove dust. Avoid using liquids or solvents that could damage components.
• Mimu ti ara: Handle the module by its edges to prevent damage to components or solder joints. Avoid applying excessive force or bending the PCB.
• Ibi ti ina elekitiriki ti nwa: Ensure a stable and clean power supply within the 2.5V to 3.3V range. Voltage fluctuations or overvoltage le ba module.
• Firmware/Software: Keep your host microcontroller's firmware and any associated software drivers updated to ensure compatibility and access to the latest features or bug fixes.

9. Laasigbotitusita

If you encounter issues with the SC16IS752 module, consider the following troubleshooting steps:

• No Communication (I2C/SPI):
  • Verify power and ground connections (VCC, GND).
  • Check I2C/SPI wiring for correct connections (SCL, SDA, SCLK, SI, SO, CS).
  • Ensure I2C pull-up resistors are correctly installed and of appropriate value.
  • Confirm the correct I2C address or SPI chip select is being used in your software.
  • Check if the I2C/SPI interface is correctly initialized on your host microcontroller.
• Incorrect UART Data:
  • Verify that the baud rate, data bits, parity, and stop bits are correctly configured on both the SC16IS752 and the connected serial device.
  • Check TX/RX line connections for proper cross-over (TX of one device to RX of the other).
  • Ensure flow control settings (hardware or software) match on both ends.
  • Inspect for noise on the UART lines, especially at high baud rates.
• Modulu Ko Dahun:
  • Perform a hardware reset by toggling the RESET pin, or a software reset via the I2C/SPI interface.
  • Re-check power supply voltage ati lọwọlọwọ.
• GPIO Issues:
  • Ensure GPIO pins are configured correctly as input or output in the software.
  • Verify that the correct registers are being accessed for reading/writing GPIO states.

If problems persist, refer to the detailed SC16IS752 datasheet for advanced debugging information or contact the manufacturer's technical support.

10. Atilẹyin ọja ati Support

For information regarding product warranty, technical support, or returns, please refer to the seller (Rakstore) or the manufacturer's official documentation and website. Specific warranty terms and support channels may vary depending on your region and point of purchase.

For further assistance, you may also consult online communities or forums dedicated to embedded electronics and the SC16IS752 chip, where users often share insights and solutions.