M16C User Manual.pdf

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Serial I/OMitsubishi microcomputers<strong>M16C</strong> / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTERSerial I/OSerial I/O is configured as five channels: UART0, UART1, UART2, S I/O3 and S I/O4.UART0 to 2UART0, UART1 and UART2 each have an exclusive timer to generate a transfer clock, so they operateindependently of each other.Figure 1.19.1 shows the block diagram of UART0, UART1 and UART2. Figures 1.19.2 and 1.19.3 showthe block diagram of the transmit/receive unit.UARTi (i = 0 to 2) has two operation modes: a clock synchronous serial I/O mode and a clock asynchronousserial I/O mode (UART mode). The contents of the serial I/O mode select bits (bits 0 to 2 at addresses03A016, 03A816 and 037816) determine whether UARTi is used as a clock synchronous serial I/O or as aUART. Although a few functions are different, UART0, UART1 and UART2 have almost the same functions.UART2, in particular, is used for the SIM interface with some extra settings added in clock-asynchronousserial I/O mode (Note). It also has the bus collision detection function that generates an interrupt request ifthe TxD pin and the RxD pin are different in level.Table 1.19.1 shows the comparison of functions of UART0 through UART2, and Figures 1.19.4 to 1.19.8show the registers related to UARTi.Note: SIM : Subscriber Identity ModuleTable 1.19.1. Comparison of functions of UART0 through UART2FunctionUART0 UART1 UART2CLK polarity selectionPossible (Note 1)Possible (Note 1)Possible (Note 1)LSB first / MSB first selectionPossible (Note 1)Possible (Note 1)Possible (Note 2)Continuous receive mode selectionPossible (Note 1)Possible (Note 1)Possible (Note 1)Transfer clock output from multiplepins selectionImpossiblePossible (Note 1)ImpossibleSeparate CTS/RTS pinsPossibleImpossibleImpossibleSerial data logic switchImpossibleImpossiblePossible (Note 4)Sleep mode selectionPossible (Note 3)Possible (Note 3)ImpossibleTxD, RxD I/O polarity switch ImpossibleImpossible PossibleTxD, RxD port output formatCMOS outputCMOS outputN-channel open-drainoutputParity error signal outputImpossibleImpossiblePossible (Note 4)Bus collision detection ImpossibleImpossible PossibleNote 1: Only when clock synchronous serial I/O mode.Note 2: Only when clock synchronous serial I/O mode and 8-bit UART mode.Note 3: Only when UART mode.Note 4: Using for SIM interface.113
Serial I/OMitsubishi microcomputers<strong>M16C</strong> / 62 GroupSINGLE-CHIP 16-BIT CMOS MICROCOMPUTER(UART0)RxD0Clock source selectionf1Bit rate generatorInternal (address 03A116)f8f321 / (n0+1)ExternalUART reception1/16Clock synchronous typeReceptioncontrol circuitUART transmission1/16TransmissionClock synchronous typecontrol circuitClock synchronous type(when internal clock is selected)1/2ReceiveclockTransmitclockTransmit/receiveunitTxD0CLK0CTS0 / RTS0CLKpolarityreversingcircuitClock synchronous type(when internal clock is selected)CTS/RTS selectedCTS/RTS disabledVccCTS/RTS disabledCTS/RTS separatedClock synchronous type(when external clock isselected)RTS0CTS0CTS0 from UART1(UART1)RxD1TxD1Clock source selectionf1Bit rate generatorInternal (address 03A916)f8f321 / (n1+1)External1/161/16UART receptionClock synchronous typeUART transmissionClock synchronous typeClock synchronous type(when internal clock is selected)1/2Receptioncontrol circuitTransmissioncontrol circuitReceiveclockTransmitclockTransmit/receiveunitCLK1CTS1 / RTS1/ CTS0 / CLKS1CLKpolarityreversingcircuitClock synchronous type(when internal clock is selected)Clock output pinselect switchClock synchronous type(when external clock isselected)CTS/RTS disabledCTS/RTS separatedVCCCTS/RTS disabledRTS1CTS1(UART2)RxD2RxD polarityreversing circuitClock source selectionf1Bit rate generatorInternal (address 037916)f8f321 / (n2+1)ExternalCTS0UART reception1/16Clock synchronous typeUART transmission1/16Clock synchronous type1/2CTS0 to UART0Clock synchronous type(when internal clock is selected)Receptioncontrol circuitTransmissioncontrol circuitReceiveclockTransmitclockTransmit/receiveunitTxDpolarityreversingcircuitTxD2CLK2CTS2 / RTS2CLKpolarityreversingcircuitClock synchronous type(when internal clock is selected)CTS/RTSselectedCTS/RTS disabledVccCTS/RTS disabledClock synchronous type(when external clock isselected)RTS2CTS2n0 : Values set to UART0 bit rate generator (BRG0)n1 : Values set to UART1 bit rate generator (BRG1)n2 : Values set to UART2 bit rate generator (BRG2)Figure 1.19.1. Block diagram of UARTi (i = 0 to 2)114
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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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Page 85 and 86: Precautions for InterruptsMitsubish
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Page 169 and 170: 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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ProtectMitsubishi microcomputersM16
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ProtectMitsubishi microcomputersM16
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Timer AMitsubishi microcomputersM16
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Counter content (hex)Timer AMitsubi
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Timer BMitsubishi microcomputersM16
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Counter content (hex)Timer BMitsubi
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Counter content (hex)Timer BMitsubi
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UARTMitsubishi microcomputersM16C /
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SIM interfaceMitsubishi microcomput
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SI/O3, 4Mitsubishi microcomputersM1
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SI/O3, 4Mitsubishi microcomputersM1
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A-D ConverterMitsubishi microcomput
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D-A ConverterMitsubishi microcomput
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DMACMitsubishi microcomputersM16C /
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CRC Calculation CircuitMitsubishi m
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Watchdog TimerMitsubishi microcompu
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Address Match InterruptMitsubishi m
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Key-Input InterruptMitsubishi micro
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Power ControlMitsubishi microcomput
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ApplicationsMitsubishi microcompute
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Timer A1 countercontent (hex)Timer
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Timer A ApplicationsMitsubishi micr
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DMAC ApplicationsMitsubishi microco
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Controlling Power ApplicationsMitsu
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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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