M16C User Manual.pdf

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A-D ConverterMitsubishi microcomputers<strong>M16C</strong> / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTER2.7.12 Method of A-D Conversion (8-bit mode)(1) In 8-bit mode, 8 higher-order bits of the 10-bit successive comparison register becomes A-Dconversion result. Hence, if compared to a result obtained by using an 8-bit A-D converter,the voltage compared is different by 3 VREF/2048 (see what are underscored in Table2.7.12), and differences in stepping points of output codes occur as shown in Figure 2.7.24.Table 2.7.12. The comparison voltage in 8-bit mode compared to 8-bit A-D converterComparisonvoltageVrefn = 0n = 1 to 255VREF2 8x8-bit mode8-bit A-D converter0 0VREFVREFVREFn –2 10 x 0.5 x –2 8 n2 8 x 0.5Optimal conversion characteristics of 8-bit A-D converter (VREF = 5.12 V)Output code(Result of A-D conversion)02010010 30Analog input voltage (mV)Optimal conversion characteristics in 8-bit mode (VREF = 5.12 V)Output code(Result of A-D conversion)8-bitmode02010010-bitmode09080706050403020100(Note)17.5 37.510bit-mode8bit-modeAnalog input voltage (mV)Note: Differences in stepping points of output code for analog input voltage.Figure 2.7.24. The level conversion characteristics of 8-bit mode and 8-bit A-D converter407
A-D ConverterMitsubishi microcomputers<strong>M16C</strong> / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERTable 2.7.13. Variation of the successive comparison register and Vref while A-D conversion is inprogress (8-bit mode)Successive approximation registerVref changeA-D converter stoppedb91b00 0 0 0 0 0 0 0 0VREF [V]21st comparison2nd comparison3rd comparison1n90100000000000000001st comparison resultn9 n8 1 0 0 0 0 0 0 02nd comparison resultVREF2VREF2VREF2–±±VREF2048[V]VREF VREF – [V]4 2048VREF4±n9 = 1 +n9 = 0 –VREF4VREF4n8VREF VREF= 1 +– [V]8 2048 n8 = 0 –VREF8VREF88th comparisonn9 n8 n7 n6 n5 n4 n3 1 0 0VREF2±VREF4±VREF8VREF± ...... ±256 – VREF2048[V]Conversioncompleten9 n8 n7 n6 n5 n4 n3 n2 0 0This data transfers to bit 0 tobit 7 of A-D register.Result of A-D conversionTheoretical A-D conversioncharacteristic of general 8-bitA-D converterFF16FE160316Theoretical A-D conversioncharacteristic in the 8-bit mode021601160016VREF VREF VREFx 2256 256 x 3 VREFx 4VREF256 256 x 254 VREF0 x 255 VREF256 x 1 256VREFAnalog input voltage2048 x 3Figure 2.7.25. Theoretical A-D conversion characteristics (8-bit mode)408
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To all our customersRegarding the c
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Keep safety first in your circuit d
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This manual comprises of eight chap
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Table of ContentsChapter 1 Hardware
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2.5 Clock-Asynchronous Serial I/O (
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4.2.1 Interrupt Enable Flag .......
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Quick Reference to Pages Classified
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Quick Reference to Pages Classified
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DescriptionMitsubishi microcomputer
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Pin DescriptionMitsubishi microcomp
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CPUMitsubishi microcomputersM16C /
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CPUMitsubishi microcomputersM16C /
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ResetMitsubishi microcomputersM16C
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ResetMitsubishi microcomputersM16C
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SFRMitsubishi microcomputersM16C /
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Memory Space Expansion FunctionsMit
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Software ResetMitsubishi microcompu
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Processor ModeMitsubishi microcompu
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Bus SettingsMitsubishi microcompute
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Specified address rangeBus ControlM
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Bus ControlMitsubishi microcomputer
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Clock Generating CircuitMitsubishi
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Clock Generating CircuitMitsubishi
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Wait ModeMitsubishi microcomputersM
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Power controlMitsubishi microcomput
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ProtectionMitsubishi microcomputers
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InterruptMitsubishi microcomputersM
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______INT InterruptMitsubishi micro
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Address Match InterruptMitsubishi m
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Precautions for InterruptsMitsubish
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Watchdog TimerMitsubishi microcompu
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DMACMitsubishi microcomputersM16C /
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TimerMitsubishi microcomputersM16C
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Timer AMitsubishi microcomputersM16
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Timer BMitsubishi microcomputersM16
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Timers’ functions for three-phase
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Serial I/OMitsubishi microcomputers
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Clock synchronous serial I/O modeMi
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Clock asynchronous serial I/O (UART
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UART2 Special Mode RegisterMitsubis
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UART2 Special Mode RegisterMitsubis
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UART2 Special Mode Register 2Mitsub
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UART2 Special Mode Register 2Mitsub
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S I/O3, 4Mitsubishi microcomputersM
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S I/O3, 4Mitsubishi microcomputersM
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A-D ConverterMitsubishi microcomput
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D-A ConverterMitsubishi microcomput
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CRCMitsubishi microcomputersM16C /
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Programmable I/O PortMitsubishi mic
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Usage precautionMitsubishi microcom
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Usage precautionMitsubishi microcom
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Electrical characteristicsMitsubish
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Electrical characteristics (Vcc = 5
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Timing (VCC=5V)Mitsubishi microcomp
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TimingMitsubishi microcomputersM16C
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Timing (Vcc = 5V)Mitsubishi microco
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Electrical characteristics (Vcc = 3
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IssuancesignatureReceiptMitsubishi
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Description (Flash Memory Version)M
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CPU Rewrite Mode (Flash Memory Vers
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Functions To Inhibit Rewriting (Fla
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Appendix Parallel I/O Mode (Flash M
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Appendix Standard Serial I/O Mode (
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274Mitsubishi microcomputersM16C /
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ProtectMitsubishi microcomputersM16
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ProtectMitsubishi microcomputersM16
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Counter content (hex)Timer AMitsubi
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Counter content (hex)Timer BMitsubi
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Counter content (hex)Timer BMitsubi
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Clock-Synchronous Serial I/OMitsubi
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UARTMitsubishi microcomputersM16C /
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Page 371 and 372: UARTMitsubishi microcomputersM16C /
Page 381 and 382: SIM interfaceMitsubishi microcomput
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Page 397 and 398: A-D ConverterMitsubishi microcomput
Page 417 and 418: Converted analog input pinConverted
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Page 439 and 440: CRC Calculation CircuitMitsubishi m
Page 441 and 442: Watchdog TimerMitsubishi microcompu
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Page 445 and 446: Address Match InterruptMitsubishi m
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Page 449 and 450: Key-Input InterruptMitsubishi micro
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Timer A ApplicationsMitsubishi micr
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DMAC ApplicationsMitsubishi microco
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DMAC ApplicationsMitsubishi microco
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Controlling Power ApplicationsMitsu
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External BusesMitsubishi microcompu
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External ROMMitsubishi microcompute
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Standard CharacteristicsMitsubishi
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Absolute error [LSB]Standard Charac
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Absolute accuracy [mV]Absolute accu
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Appendix 1Mitsubishi microcomputers
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Appendix 2 Hexadecimal instruction
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Appendix 3 Setting register for pin
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MITSUBISHI Single-Chip Microcompute
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