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CR16MFS544VE Datasheet(PDF) 7 Page - National Semiconductor (TI) |
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CR16MFS544VE Datasheet(HTML) 7 Page - National Semiconductor (TI) |
7 / 99 page 7 www.national.com 3.13 A/D CONVERTER The A/D Converter (ADC) module is an 8-channel multi- plexed-input analog-to-digital converter. The A/D Converter receives an analog voltage signal on an input pin and con- verts the analog signal into an 8-bit digital value using suc- cessive approximation. The CPU can then read the result from a memory-mapped register. The module supports four automated operating modes, providing single-channel or scanned 4-channel operation in single or continuous mode. The 80-pin device has a separate pin, Vref, for the A/D refer- ence voltage. The 44-pin devices use the AVCC (analog VCC) power supply pin as the reference voltage. 3.14 ANALOG COMPARATORS The Dual Analog Comparator (ACMP2) module contains two independent analog comparators with all necessary control logic. Each comparator unit compares the analog input volt- ages applied to two input pins and determines which voltage is higher. The CPU uses a memory-mapped register to con- trol the comparator and to obtain the comparison results. The comparison result can also be applied to comparator output pins. 3.15 DEVELOPMENT SUPPORT A powerful cross-development tool set is available from Na- tional Semiconductor and third parties to support the devel- opment and debugging of application software for the device. The tool set lets you program the application software in C and is designed to take full advantage of the CompactRISC architecture. There are In-System Emulation (ISE) devices available for the device from iSYSTEM™, as well as lower-cost evaluation boards. See your National Semiconductor sales representa- tive for current information on availability of various features of emulation equipment and evaluation boards. |
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