The Genesys GL819 Controller

The APIOTEK 12-in-1 Express Card Adapter uses the Genesys GL819 flash card reader controller. In addition to formats supported by the adapter, the Genesys GL819 also supports formats like the CompactFlash Type I and Type II, MicroDrive, SmartMedia and High-Speed Memory Stick.

Its embedded 8051 microcontroller runs at 60MHz, with a processing cycle of 12 clocks per instruction. It's no speed freak, but you only need it to read flash media. It also comes with 256 bytes of internal SRAM and 4KB of external SRAM for quick data access.

This particular controller also supports external flashing of its firmware. However, it's unlikely you will see firmware upgrades from either Genesys or APIOTEK, unless there's a critical bug in the original firmware.

If you are interested to see the details of the flash media formats that the Genesys GL819 supports, take a look here.

• CompactFlash interface
  - Support CFA specification v2.1 / v3.0
  - Support True IDE mode
  - Support 8 / 16 bit data mode and different timing
   
• xD-Picture Interface (Certified No. AA-RG0374)
  - xD-Picture specification v1.2B.
  - xD-Picture Type M/H card support.
   
• SmartMedia interface
  - 8 bit data width and different speed
  - Support different page size, and automatic append redundant area data (8 / 16 bytes)
   
• MemoryStick / MemoryStick Pro interface
  - Compliant with MemoryStick interface specification
  - Support INS signal
  - Support automatic CRC16 generation and verification
   
• Secure Digital and MultiMediaCard
  - Compliant with Secure Digital / MMC interface specification
  - Supports both SD / MMC mode access
  - Supports SD specification v1.0 / v1.1/ v2.0
  - Supports MMC specification v4.0 / v4.1 x1 / x4 / x8 data transmission.
  - Automatic CRC7 generation for command and CRC7 verification for response on CMD
  - Support automatic CRC16 generation and verification on DAT0:7
  - In addition to full packet transaction, optional single byte / bit operation on both CMD and DAT line / lines
  - Process data in block or byte

Specification And Features

Here are the specifications and features for the APIOTEK 12-in-1 Express Card Adapter.