GL422/GL423 USB 2.0 +SD/MMC-controller Combo Solution
3.1.7 High efficient hardware engine
• Automatic data read / write with card by hardware engine
• Easier firmware development
• Media interface signals output low automatically when suspend
3.1.8 Inter-Media transfer capability
• Support copy data between flash cards or within same flash card
3.2 Block diagram
MHE
EPFIFO
MHE
EP0 FIFO
control
(64B)
SIE
MCFIFO
EP3 FIFO
(32B)
(64B)
MS
MIF
BULK FIFO
(512B*2)
MSP
MIF
Register
SIE/
8051 core
SD
MIF
FIFO/
MHE
control
UTM
SRAM
256B
LUT
Mask
ROM
(48KB)
LUT
4KB
Figure 3.1 - USB Controller diagram
3.2.1 UTM
USB2.0 Transceiver Macro
3.2.2 SIE
Serial Interface Engine
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