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1.2. U5005, 4 GB DDR3 SDRAM C-Die
Description
The 4 GB Double-Data-Rate-3 (DDR3) DRAMs is a high-speed CMOS SDRAM containing 4,294,967,296 bits.
It is internally configured as an octal-bank DRAM.
The 4 GB chip is organized as 64Mbit x 8 I/O x 8 banks and 32Mbit x16 I/O x 8 banks. These synchronous
devices achieve high speed double-data-rate transfer rates of up to 2133 Mb/sec/pin for general applications.
The chip is designed to comply with all key DDR3 DRAM key features and all of the control and address
inputs are synchronized with a pair of externally supplied differential clocks. Inputs are latched at the cross
point of differential clocks (CK rising and falling). All I/Os are synchronized with a single ended DQS or
differential DQS pair in a source synchronous fashion.
1.3 U5006, 2Gb DDR3 SDRAM F-Die
The 2Gb Double-Data-Rate-3 (DDR3(L)) B-die DRAM is double data rate architecture to achieve high-speed
operation. It is internally configured as an eight bank DRAMs.
The 2 GB chip is organized as 32Mbit x 8 I/Os x 8 banks or 16Mbit x 16 I/Os x 8 bank devices. These
synchronous devicesachieve high speed double-data-rate transfer rates of up to 1866 Mb/sec/pin for general
applications. The chip is designed to comply with all key DDR3(L) DRAM key features and all of the control
and address inputs are synchronized with a pair of externally supplied differential clocks. Inputs are latched at
the cross point of differential clocks (CK rising and CK falling). All I/Os are synchronized with a single ended
DQS or differential DQS pair in a source synchronous fashion.
1.4. U6501 (YDA176-QZE2)
YDA176 is a high-performance digital audio amplifier IC that delivers up to 15W×2ch,
which has a digital audio interface, and is capable of operating at a supply voltage ranging from
5V*1) to 18V. YDA176, with Yamaha original “Pure Pulse Direct Speaker Drive Circuit,＂ allows
a speaker to be directly connected to the output. In addition, this amplifier is insusceptible to supply
voltage fluctuation because of a feedback-type digital amplifier, and have the feature with high
power supply noise tolerance.As a result, power supply can be simplified and allowing a simple
amplifier system with less external components to be configured. YDA176 has the following
functions: gain setting function, power limit function, pop noise reduction function, over current
protection function for speaker output pins, internal over temperature protection function, under
voltage lockout, and DC detection function.
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