GL823U中文资料USB 2.0 SD/MMC Card Reader Controller数据手册Genesys规格书

描述 Description

The GL823U is a USB 2.0 SD/MMC Flash Card Reader single chip. It supports USB 2.0 high-speed transmission to Secure DigitalTM (SD), SDHC, SDXC, miniSD, microSD (T-Flash), MultiMediaCardTM (MMC), RS-MMC, MMCmicro, MMCmobile on one chip. As a single chip solution for USB 2.0 flash card reader, the GL823U complies with Universal Serial Bus specification rev. 2.0, USB Storage Class specification ver.1.0, and SD/MMC card interface specification.

The GL823U integrates a high speed 8051 microprocessor and a high efficiency hardware engine for the best data transfer performance between USB and flash card interfaces. Its’ pin assignment design fits to card sockets to provide easier PCB layout. Inside the chip, it integrates 5V to 3.3V and 3.3V to 1.8V regulators and power MOSFETs and it enables the function of on-chip clock source (OCCS) which means no external 12MHz XTAL is needed and that effectively reduces the total BOM cost.

特性 Features

• USB specification compliance
• Integrated USB building blocks
• Embedded 8051 micro-controller
• Secure DigitalTM (SD) and MultiMediaCardTM (MMC)
• Support customized vendor information when using with SD card embedded as USB Flash Drive.
• On-Chip 5V to 3.3V and 3.3V to 1.8V regulators
• Provide Over-Current protection mechanism for safety power supply
• Operating system supported: Windows 7/Vista32&64/XP/2000/Me/98/98SE, Mac OS 9.X/10.X, Linux Kernel 2.4.X/2.6.X
• Package available in 24 pin QFN (4x4 mm)