GL816 – USB 2.0 Flash Card Reader Controller

©2000-2001 Genesys Logic Inc.—All rights reserved.

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2. Normally MHE popes data, SIE pushes data for DATA A/B FIFOs, and

redundant area is pushed by uC and popped by MHE when SmartMedia MIF is

enabled.

3.2.5.3 Buffer Mode:

1. Buffer mode is enabled by firmware and is used to copy data block from source

to destination in same card for SmartMedia or MemoryStick applications.

2. Under Buffer mode, firmware can enable MIF to read source data block to

TXFIFO, check the data integrity, then enable MIF to write data in TXFIFO to

destination data block space on memory card.

space is from redundant area of RXFIFO.

3.2.6 MHE (Media Hardware Engine)

The Media Hardware Engine contains 4 MIF (Media Interface), MHE control and

MCFIFO.

3.2.6.1 MIF (Media Interface):

There are PCMCIA MIF, SmartMedia MIF, MemoryStick MIF, and Secure Digital/

Multi Media Card MIF in MHE.

3.2.6.2 MCFIFO (Media Control FIFO):

It’s a 64-byte FIFO that shared by MemoryStick and SD/ MMC MIF. In MemoryStick

application, the MCFIFO is used for register read and write function; In SD/ MMC

application, it is used for command and response.

3.2.6.3 SMAFIFO (SmartMedia

It’s a 4-byte FIFO for SmartMedia address only.