Page 131 - DCAP104_EXPOSURE_TO_COMPUTER_DISCPLINES

Exposure to Computer Disciplines

Notes 6.4.3.1 Parity Checksum
It is possible for an error to occur somewhere in the transmission process. One way to increase
the reliability of transmitted PCM signals is to add a checksum bit to each piece of data. For
example, in an eight-bit byte, seven of the bits can be used for data and the last reserved for
a checksum bit. In one method, the checksum bit is determined by parity (meaning an even
or odd number). In even parity checksums, a 0 or 1 is added to make the overall number
of ones (including the checksum) even. In odd parity, a 0 or 1 is added to make the overall
number of ones odd.

6.4.4 Some Digital Data Connection Methods

6.4.4.1 LM2700 Step-Up PWM DC/DC Converter Datasheet
LM2700 step-up PWM DC/DC converter is an ideal part for biasing LCD displays. It features
internal switch, pin selectable http://datasheetoo.com/wp-content/uploads/2009/12/
Step-Up-PWM-DC-DC-Converter-Datasheet-and-Circuit-Diagram.jpg frequency for easy
filtering and low noise, over temperature protection circuit and adjustable output voltage
up to 17.5V. It used to be applied on applications such as handheld, GSM/CDMA Phones,
digital cameras and portable applications.

Figure 6.11: Schematic of PWM DC/DC Converter

Find sections such the typical application circuit, 14-Lead TSSOP or LLP package connection
diagram, pin description, operation circuit example of LM2700 (continuous conduction mode,
setting the output voltage, DC gain and Loop gain, inductor and diode selection, input and output
capacitor selection, and etc), and the application circuit information related to the operation
functions in the datasheet.

6.4.4.2 ADV7123 Digital-to-Analog Converter Connection Diagram and
Datasheet
This digital-to-analog converter (DAC) integrated circuit is designed for lowest noise performance,
both radiated and conducted noise.

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