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CHAPTER 20 8/10-BIT A/D CONVERTER
20.1
Overview of the 8/10-bit A/D Converter
Using the RC-type successive approximation conversion method, the 8/10-bit A/D
converter converts an analog input voltage into a 10-bit or 8-bit digital value.
An input signal is selected from eight channels for analog input pins. The conversion
can be activated by software, an internal clock, and 16-bit free-run timer zero detection.
■
Functions of the 8/10-bit A/D Converter
The converter converts the analog voltage input to an analog input pin (input voltage) to a digital value.
The converter has the following features:
•
The minimum conversion time is 6.13
µ
s (for a machine clock of 16 MHz; includes the sampling time).
•
The minimum sampling time is 3.75
µ
s (for a machine clock of 16 MHz).
•
The converter uses the RC-type successive approximation conversion method with a sample and hold
circuit.
•
A resolution of 10 bits or 8 bits can be selected.
•
Up to eight channels for analog input pins can be selected by a program.
•
At the end of A/D conversion, an interrupt request can be generated and EI
2
OS can be activated.
•
In the interrupt-enabled state, the conversion data protection function prevents any part of the data from
being lost through continuous conversion.
•
The conversion can be activated by software, 16-bit reload timer 1 (rising edge) and 16-bit free-run
timer zero detection edge.
Table 20.1-1 lists three types of conversion modes.
Table 20.1-1 8/10-bit A/D Converter Conversion Modes
Single conversion
Scan conversion
Single conversion mode
Converts the input of a specified
channel (single channel) just once.
Converts the inputs of two or more consecutive
channels (up to eight channels) just once.
Continuous conversion mode
Converts the input of a specified
channel (single channel) repeatedly.
Converts the inputs of two or more consecutive
channels (up to eight channels) repeatedly.
Stop conversion mode
Converts the input of a specified
channel (single channel), after which it
is on standby for the next activation.
Converts the inputs of two or more consecutive
channels (up to eight channels).
When a channel has been converted, the
converter is put on standby for the next
activation.
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: ......