GL422/GL423 USB 2.0 +SD/MMC-controller Combo Solution
CHAPTER 2 FEATURES
2.1 USB 2.0 Interface
• Complies with Universal Serial Bus Specification Version 2.0
• Complies with USB Mass Storage Class Specification Version 1.0
• Integrated USB 2.0 Transceiver Macro-cell (UTM), Serial Interface Engine (SIE), Build-in
power-on reset (POR) and low-voltage detector (LVD)
• Supports one USB device address and up to 5 endpoints, including one control, one interrupt and
2 bulk IN/OUT endpoint pairs
• Embedded 8051 micro-controller operates at 60MHz clock
• 64 / 512 bytes Data Payload for full / high speed Bulk Endpoint
• Supports USB 2.0 TEST mode features
2.2 SD Host Interface
• Complies with SD Specification Version 1.1
• Backward compatible with SD Specification, Version 1.0
• Supports SPI mode and CPRM functions
• Supports clock rate up to 25 MHZ for SD1.0
• Supports clock rate up to 52MHz for SD1.1
• Buffers for multi-block flash memory programming
• DMA operation between buffers and flash memory
• Supports automatic CRC16 generation and verification on DATA 3-0
2.3 MMC Host Interface
• Complies with MultiMediaCard System Specification, Version 4.0
• Backward compatible with MultiMediaCard System Specification, Version 3.3
• Supports SPI mode and CPRM functions
• Supports clock rate up to 25 MHZ for MMC 3.3
• Supports clock rate up to 52MHz for MMC 4.0
• Buffers for multi-block flash memory programming
• DMA operation between buffers and flash memory
• Supports automatic CRC16 generation and verification on DATA 7-0
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