38
LC-32LE530
LC-40LE530
9. USB INTERFACE
Main Concept IC has integrated 2 USB 2.0 interface. One of them is used for ethernet
function, the other one is used for USB connectivity for last user. Last user can play video,
picture and audio files. Also digital channels can be record to externall storage device by
this interface. All SW files can be updated with interface.
USB circuit has 3 main parts
x Integrated USB 2.0 Host interface of D3 (U157)
x Protection IC (U145)
x Over Curent Protection IC (U149)
10. DDR2 SDRAM 8M × 4 BANKS × 16 BIT (W9751G6JB)
(U154, U155)
10.1. General Description
The W9751G6JB is a 512M bits DDR2 SDRAM, organized as 8,388,608 words × 4 banks
× 16 bits. This device achieves high speed transfer rates up to 1066Mb/sec/pin (DDR2-
1066) for general applications. W9751G6JB is sorted into the following speed grades: -18,
-25 and -3. The -18 is compliant to the DDR2-1066/CL7 specification. The -25 is
compliant to the DDR2-800 (5-5-5) or DDR2-800 (6-6-6) specification. The -3 is compliant
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