USB TO SERIAL TTL

The board converts USB communications to UART. We recommend its use to program the «ARUAL ESP32» family processors.
It also has two buttons, one for resetting, and the other for entering the ESP32 processor’s BOOT mode.

USB-UART CP2104:
The CP2104 is a highly-integrated USB-to-UART Bridge Controller providing a simple solution for updating RS-232/RS-485 designs to USB using a minimum of components and PCB space. The CP2104 includes a USB 2.0 full-speed function controller, USB transceiver, oscillator, one-time programmable ROM, and asynchronous serial data bus (UART) with full modem control signals in a compact 4 x 4 mm QFN-24 package (sometimes called “MLF” or “MLP”). No other external USB components are required.

Royalty-free Virtual COM Port (VCP) device drivers provided by Silicon Labs allow a CP2104-based product to appear as a COM port to PC applications. The CP2104 UART interface implements all RS-232/RS-485 signals, including control and handshaking signals, so existing system firmware does not need to be modified. The device also features up to four GPIO signals that can be user-defined for status and control information. Support for I/O interface voltages down to 1.8 V is provided via a VIO pin. In many existing RS-232 designs, all that is required to update the design from RS-232 to USB is to replace the RS-232 level-translator with the CP2104. Direct access driver support is available through the Silicon Labs USBXpress driver set.

See www.siliconlabs.com for the latest application notes and product support information for the CP2104.

Features:

Single-Chip USB to UART Data Transfer

• Integrated USB transceiver; no external resistors required
• Integrated clock; no external crystal required
• Integrated 1024-Byte One-Time Programmable ROM for customizable product information
• On-chip power-on reset circuit
• On-chip voltage regulator: 3.45 V output

USB Function Controller

• USB Specification 2.0 compliant; full-speed (12 Mbps)
• USB Suspend states supported via SUSPEND and SUSPEND pins

Asynchronous Serial Data BUS (UART)

• All handshaking and modem interface signals
• Data formats supported:
  • Data bits: 5, 6, 7, and 8
  • Stop bits: 1, 1.5, and 2
  • Parity: odd, even, mark, space, no parity
• Baud rates: 300 bps to 2 Mbits
• 576 byte receive buffer; 576 byte transmit buffer
• Hardware or X-On/X-Off handshaking supported
• Four GPIO signals for status and control
• Configurable I/O (1.8 V to VDD) using VIO pin
• Configurable I/O (VDD to 5 V) using external pull-up
• RS-485 mode with bus transceiver control

Virtual COM Port Device Drivers

• Works with Existing COM Port PC Applications
• Royalty-Free Distribution License
• Windows 7®/Vista®/XP®/Server 2003®/2000®
• Mac® OS-X
• Linux®

USBXpress™ Direct Driver Support

• Royalty-Free Distribution License
• Windows 7/Vista/XP/Server 2003/2000
• Windows CE® 6.0, 5.0, and 4.2

Example Applications

• Upgrade of RS-232 legacy devices to USB
• Upgrade of RS-485 legacy devices to USB
• Cellular phone USB interface cable
• PDA USB interface cable
• USB to RS-232 serial adapter

Supply Voltage

• Self-powered: 3.0 to 3.6 V
• USB bus powered: 4.0 to 5.25 V
• I/O voltage: 1.8 V to VDD

Package

• RoHS-compliant 24-pin QFN (4×4 mm)

Ordering Part Number

• CP2104-F03-GM

Temperature Range: –40 to +85 °C