GL816E Datasheet, PDF (16/26 Pages) GENESYS LOGIC – USB 2.0 9-in-1 Card Reader Controller

GL816E USB 2.0 9-in-1 Card Reader Controller
CHAPTER 5 FUNCTIONAL DESCRIPTION
5.1 UTM
The USB 2.0 Transceiver Macrocell, it’s the analog circuitry that handles the low level USB protocol and
signaling, and shifts the clock domain of the data from the USB 2.0 rate to one that is compatible with the
general logic.
5.2 SIE
The Serial Interface Engine, which contains the USB PID and address recognition logic, and other sequencing
and state machine logic to handle USB packets and transactions.
5.3 EP0 FIFO
It is composed of TX0FIFO and RX0FIFO, with 64-byte FIFO each, and it is used for endpoint 0 data transfer.
5.4 EP3 FIFO
It’s an 8-byte FIFO for endpoint 3.
5.5 Bulk FIFO
It is composed of TXFIFO and RXFIFO for data transmission and receiving respectively, also with different
modes support:
TXFIFO:
1. To ensure the continuous data transmission, TXFIFO includes 512 bytes DATA-A FIFO, 512 bytes
DATA-B FIFO, and two 16 bytes corresponding redundant areas. All can be directly accessed by 8051
µ C.
2. Normally SIE popes data, MHE pushes data for DATA A/B FIFOs, and redundant area is pushed by MHE
when SmartMedia MIF is enabled and popped by uC.
3. Supports uC single byte access for SmartMedia ECC error correction.
4. At transmit mode SIE won’t transmit data filled in TXFIFO before uC complete the data integrity
checking.
RXFIFO:
1. To ensure the continuous data transmission, RXFIFO includes 512 bytes DATA-A FIFO, 512 bytes
DATA-B FIFO, and 16 bytes single redundant area. All can be directly accessed by 8051 µC.
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.
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 Memory Stick 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.
3. For SmartMedia application, the redundant data write to destination data block space is from redundant
area of RXFIFO.
5.6 MHE (Media Hardware Engine)
The Media Hardware Engine contains 4 MIF (Media Interface), MHE control and MCFIFO.
1. MIF (Media Interface): There are CompactFlash MIF, Memory Stick/ Memory Stick PRO MIF, Secure
Digital/ MultiMediaCard MIF and SmartMedia/ xD-Picture Card MIF in MHE.
2. MCFIFO (Media Control FIFO): It’s a 64-byte FIFO that shared by Memory Stick/ Memory Stick PRO
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. SMAFIFO (SmartMedia ^TM Address FIFO): It’s a 4-byte FIFO for SmartMedia address only.
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