GL422/GL423 USB 2.0 +SD/MMC-controller Combo Solution
CHAPTER 3 PIN ASSIGNMENT
3.1 Function description
3.1.1 USB specification compliance
• Confirms to USB 480Mbps Specification, version 2.0.
• Backward compatible with USB 12Mbps Specification, version 1.1.
• Support one USB device address and up to 5 endpoints, including one control, one interrupt and 2
bulk IN / OUT endpoint pairs
3.1.2 Integrated USB building blocks
• USB2.0 transceiver macro (UTM), Serial Interface Engine (SIE), Build-in power-on reset (POR) and
low-voltage detector (LVD)
3.1.3 Embedded 8051 micro-controller
• Operates at 60 MHz clock, 12 clocks per instruction cycle
• Embedded 48K Byte mask ROM and internal 256 byte SRAM
• Embedded 4K Byte external SRAM
3.1.4 3.3V power source
3.1.5 Memory Stick TM interface
• Compliant with Memory Stick interface specification
• Hardware support BS/SDIO/SCLK signals
• Support INS signal
• Support automatic CRC16 generation and verification
3.1.6 Secure Digital (SD) and Multi Media Card (MMC)
• Compliant with Secure Digital / MMC interface specification
• Support both SD / MMC mode access CLK/CMD/DAT0/DAT1/DAT2/DAT3
• Command transmit and response receive can be enabled separately
• Automatic CRC7 generation for command and CRC7 verification for response on CMD
• Support automatic CRC16 generation and verification on DAT3-0
• In addition to full packet transaction, optional single byte / bit operation on both CMD and DAT line
/ lines
• Process data in block or byte
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