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CHAPTER 20 8/10-BIT A/D CONVERTER
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Clock selector
The clock selector selects the clock for activating A/D conversion. Either 16-bit reload timer channel 1
output or 16-bit free-run timer zero detection can be used as the activation clock.
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Decoder
This circuit selects the analog input pin to be used based on the settings of the ANE0 to ANE2 bits and
ANS0 to ANS2 bits of the A/D control status register (ADCS0).
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Analog channel selector
This circuit selects the pin to be used from eight analog input pins.
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Sample and hold circuit
This circuit maintains the input voltage of the channel selected by the analog channel selector. It samples
and maintains the input voltage obtained immediately after the activation of A/D conversion. This circuit
protects the A/D conversion from any variations in the input voltage during approximation.
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D/A converter
This circuit generates a reference voltage for comparison with the input voltage maintained by the sample
and hold circuit.
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Comparator
This circuit compares the input voltage maintained by the sample and hold circuit with the output voltage
of the D/A converter to determine which is greater.
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Control circuit
This circuit determines the A/D conversion value based on the decision signal generated by the comparator.
When the A/D conversion has been completed, the circuit sets the conversion result in the A/D data register
(ADCR0/ADCR1) and generates an interrupt request.
Summary of Contents for MB90460 Series
Page 1: ...The following document contains information on Cypress products ...
Page 3: ......
Page 5: ......
Page 9: ...iv ...
Page 41: ...22 CHAPTER 1 OVERVIEW ...
Page 45: ...26 CHAPTER 2 NOTES ON HANDLING DEVICES ...
Page 83: ...64 CHAPTER 3 CPU ...
Page 95: ...76 CHAPTER 4 RESET ...
Page 107: ...88 CHAPTER 5 CLOCK ...
Page 131: ...112 CHAPTER 6 LOW POWER CONSUMPTION MODE ...
Page 175: ...156 CHAPTER 7 INTERRUPT ...
Page 181: ...162 CHAPTER 8 MODE SETTING ...
Page 223: ...204 CHAPTER 9 I O PORT ...
Page 237: ...218 CHAPTER 10 TIME BASE TIMER ...
Page 247: ...228 CHAPTER 11 WATCHDOG TIMER ...
Page 275: ...256 CHAPTER 12 16 BIT RELOAD TIMER ...
Page 373: ...354 CHAPTER 14 MULTI FUNCTIONAL TIMER ...
Page 485: ...466 CHAPTER 16 PWC Timer ...
Page 531: ...512 CHAPTER 17 UART ...
Page 559: ...540 CHAPTER 19 DELAYED INTERRUPT GENERATOR MODULE ...
Page 589: ...570 CHAPTER 20 8 10 BIT A D CONVERTER ...
Page 601: ...582 CHAPTER 21 ROM CORRECTION FUNCTION ...
Page 633: ...614 CHAPTER 23 512K 1024K BIT FLASH MEMORY ...
Page 645: ...626 CHAPTER 24 EXAMPLE OF F2 MC 16LX MB90F462 F462A F463A CONNECTION FOR SERIAL WRITING ...
Page 715: ...696 APPENDIX ...
Page 716: ...697 INDEX INDEX The index follows on the next page This is listed in alphabetic order ...
Page 739: ......