USBSDREADER01 - USB to SD Card Reader Module

Overview

This module is designed to interface USB devices with SD cards, utilizing the MAX14502AETL integrated circuit. The MAX14502AETL supports both full-speed USB communication (12Mbps) for bridget devices and Hi-Speed USB communication (480Mbps) as SDcard reader, providing a versatile solution for various USB to SD card reading applications.

Features

• USB 2.0 Hi-Speed and Full-Speed Compliant
• Supports SDHC Cards
• Internal Hi-Speed USB SD Card Reader
• On-Chip Termination and Pullup Resistors
• Internal SD Switches for Multiplexing Two SD Cards
• Clock Input Frequencies: 26MHz, 19.2MHz, 13MHz, 12MHz
• Low-Amplitude TCXO Signal Compatibility
• No Power-Supply Sequencing Required
• 1.8V to 3.3V I/O Host Microprocessor Compatibility
• Simple GPIO Control Mode
• I2C Control for Multiple Configuration Options
• Power-On Reset/Brown-Out Reset

Technical Specifications

• Supply Voltage (VCC): 2.4V to 3.6V
• Logic Interface Supply Voltage (VIO): 1.5V to 3.6V
• USB Supply Voltage (VTM): 2.91V to 3.4V
• Operating Temperature Range: -40°C to +85°C
• Package: 40-pin TQFN

Pin Description

• I2C_SEL: I2C Select Input
• SCL: I2C Serial-Clock Input
• SDA: I2C Serial-Data I/O
• ADD: I2C Address Selection Input
• BERR/INT: Card Reader Error/Interrupt Output
• BUSY: Busy Output
• MODE: Card Reader/Pass Thru Mode Select Input
• RST: Reset Input
• FREF: Frequency Input (12MHz/13MHz/19.2MHz/26MHz)

Schematic

Applications

• Data loggers
• Cameras
• Flight computers

Installation and Usage

1. Power Supply:

   • Connect the power supply to the VCC and GND pins.
   • Ensure the supply voltage is within the specified range (2.4V to 3.6V).

2. USB Connection:

   • Connect the USB data lines (D+ and D-) to the corresponding pins on the module.
   • Use the USB_B and USB_A connectors for input and output respectively.

3. SD Card Connection:

   • Connect the SD card signals (CMD, CLK, DAT0-3) to the corresponding pins on the module.
   • Ensure proper insertion and alignment of the SD card.

4. I2C Configuration:

   • If I2C control is needed, connect the I2C_SEL, SCL, and SDA pins appropriately.
   • Configure the I2C address using the ADD pin.

5. Operation Modes:

   • Select Pass Thru or Card Reader mode using the MODE pin.
   • Reset the device using the RST pin if necessary.

For detailed electrical characteristics and operational guidance, refer to the MAX14502AETL Datasheet.

Support

For further assistance, visit MLAB or contact our support team at [email protected].