80C186EB/80C188EB Microprocessor User's Manual - CEUNES

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REFRESH CONTROL UNITRegister Name:Register Mnemonic:Register Function:Refresh Address RegisterRFADDRContains the generated refresh address bits.15 0RA12RA11RA10RA9RA8RA7RA6RA5RA4RA3RA2RA1RA0A1501-0ABitMnemonicBit NameResetStateFunctionRA12:1RefreshAddress Bits000HThese bits comprise A12:1 of the refreshaddress.RA0Refresh Bit01 A0 of the refresh address. This bit is always 1and is read-only.NOTE:Reserved register bits are shown with gray shading. Reserved bits must be writtento a logic zero to ensure compatibility with future Intel products.Figure 7-9. Refresh Address Register7.7.3 Programming ExampleExample 7-1 contains sample code to initialize the Refresh Control Unit.7-11
REFRESH CONTROL UNIT$mod186nameexample_80C186_RCU_code; FUNCTION: This function initializes the DRAM Refresh; Control Unit to refresh the DRAM starting at dram_addr; at clock_time intervals.; SYNTAX:; extern void far config_rcu(int dram_addr, int clock_time);; INPUTS: dram_addr - Base address of DRAM to refresh; clock_time - DRAM refresh rate; OUTPUTS: None; NOTE: Parameters are passed on the stack as; required by high-level languages.RFBASE equ xxxxh ;substitute register offsetRFTIMEequ xxxxhRFCONequ xxxxhEnable equ 8000h ;enable bitlib_80186_config_rcusegment public 'code'assume cs:lib_80186public _config_rcuproc farpush bpmov bp, sp;save caller's bp;get current top of stack_clock_time equ word ptr[bp+6] ;get parameters off_dram_addr equ word ptr[bp+8] ;the stackpush axpush cxpush dxpush di;save registers that;will be modifiedExample 7-1. Initializing the Refresh Control Unit7-12
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80C186EB/80C188EBMicroprocessorUser
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Information in this document is pro
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CONTENTS2.3.2 Software Interrupts .
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CONTENTS6.4.4 Enabling and Disablin
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CONTENTS10.2.2 Asynchronous Mode Pr
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CONTENTSFIGURESFigurePage2-1 Simpli
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CONTENTSFIGURESFigurePage6-9 Using
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CONTENTSTableTABLESPage1-1 Comparis
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CONTENTSEXAMPLESExamplePage5-1 Init
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CHAPTER 1INTRODUCTIONThe 8086 micro
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INTRODUCTIONEach chapter covers a s
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INTRODUCTION1.3.1 How to Use Intel'
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Overview of the80C186 FamilyArchite
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OVERVIEW OF THE 80C186 FAMILY ARCHI
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Bus Interface Unit3
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BUS INTERFACE UNITPhysical Implemen
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BUS INTERFACE UNIT(X + 1)(X)A19:1 D
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BUS INTERFACE UNITFor word transfer
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BUS INTERFACE UNITCLKOUTT4 T1 T2 T3
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BUS INTERFACE UNITCLKOUTT4or TI T1
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BUS INTERFACE UNITSignals From CPU4
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BUS INTERFACE UNITT2T3or TWT4or TIC
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BUS INTERFACE UNITA normally not-re
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BUS INTERFACE UNITT2or T3or TWT3or
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BUS INTERFACE UNITAn idle bus state
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BUS INTERFACE UNIT3.5.1.1 Refresh B
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BUS INTERFACE UNITMost memory and p
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BUS INTERFACE UNITCLKOUTT4 T2 T3 TI
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BUS INTERFACE UNIT3.5.4 HALT Bus Cy
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BUS INTERFACE UNITCLKOUTT1 TI TIALE
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BUS INTERFACE UNITCLKOUTALES2:0AD15
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BUS INTERFACE UNITCLKOUTNMI/INTxNot
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BUS INTERFACE UNITALEProcessorA19:1
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BUS INTERFACE UNITThe WAIT instruct
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BUS INTERFACE UNITCLKOUTHOLD124HLDA
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BUS INTERFACE UNITCLKOUT1 3 4HOLDHL
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BUS INTERFACE UNITCLKOUTHOLD12345HL
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Peripheral ControlBlock4
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PERIPHERAL CONTROL BLOCKRegister Na
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PERIPHERAL CONTROL BLOCK4.3 RESERVE
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PERIPHERAL CONTROL BLOCK4.4.3.1 Wri
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PERIPHERAL CONTROL BLOCK4-8
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CHAPTER 5CLOCK GENERATION AND POWER
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CLOCK GENERATION AND POWER MANAGEME
Page 142 and 143: CLOCK GENERATION AND POWER MANAGEME
Page 158: Chip-Select Unit6
Page 161 and 162: CHIP-SELECT UNIT27C25674AC138A1:13A
Page 163 and 164: CHIP-SELECT UNITT4 T1 T2 T3T4CLKOUT
Page 165 and 166: CHIP-SELECT UNITThe START register
Page 167 and 168: CHIP-SELECT UNITRegister Name:Regis
Page 169 and 170: CHIP-SELECT UNIT6.4.2 Start Address
Page 171 and 172: CHIP-SELECT UNITBUS READYREADY Cont
Page 173 and 174: CHIP-SELECT UNITTable 6-3 lists exa
Page 175 and 176: CHIP-SELECT UNITREADYALEA19:16AD15:
Page 177 and 178: CHIP-SELECT UNITDRAM_BASEEQU 128 ;W
Page 179 and 180: CHIP-SELECT UNIT; DATA SEGMENTDATAS
Page 182 and 183: CHAPTER 7REFRESH CONTROL UNITThe Re
Page 184 and 185: REFRESH CONTROL UNITRefresh Control
Page 186 and 187: REFRESH CONTROL UNIT7.5 REFRESH BUS
Page 188 and 189: REFRESH CONTROL UNIT7.7 PROGRAMMING
Page 190 and 191: REFRESH CONTROL UNITRegister Name:R
Page 194 and 195: REFRESH CONTROL UNITmov dx, RFBASEm
Page 196: Interrupt ControlUnit8
Page 199 and 200: INTERRUPT CONTROL UNITTimer 0 Timer
Page 201 and 202: INTERRUPT CONTROL UNITInterrupt sou
Page 203 and 204: INTERRUPT CONTROL UNIT8.2.2.1 Prior
Page 205 and 206: INTERRUPT CONTROL UNITINTINT08259Ao
Page 207 and 208: INTERRUPT CONTROL UNIT8.2.6 Edge an
Page 209 and 210: INTERRUPT CONTROL UNITTable 8-3. In
Page 211 and 212: INTERRUPT CONTROL UNIT.Register Nam
Page 213 and 214: INTERRUPT CONTROL UNIT8.3.2 Interru
Page 215 and 216: INTERRUPT CONTROL UNIT8.3.4 Priorit
Page 217 and 218: INTERRUPT CONTROL UNITReading the P
Page 219 and 220: INTERRUPT CONTROL UNITRegister Name
Page 221 and 222: INTERRUPT CONTROL UNIT3. Program th
Page 224 and 225: CHAPTER 9TIMER/COUNTER UNITThe Time
Page 226 and 227: TIMER/COUNTER UNITTimer 0 Timer 1 T
Page 228 and 229: TIMER/COUNTER UNITContinued From"A"
Page 230 and 231: TIMER/COUNTER UNITRegister Name:Reg
Page 236 and 237: TIMER/COUNTER UNITThe timer countin
Page 238 and 239: TIMER/COUNTER UNITTimer 0Serviced1I
Page 240 and 241: TIMER/COUNTER UNIT9.3.2 Synchroniza
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TIMER/COUNTER UNITlib_80186 segment
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TIMER/COUNTER UNIT$mod186nameexampl
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TIMER/COUNTER UNIT_CMPB equ word pt
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SerialCommunicationsUnit10
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SERIAL COMMUNICATIONS UNIT1 2 3 4 5
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SERIAL COMMUNICATIONS UNITThe RX ma
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SERIAL COMMUNICATIONS UNITThe Trans
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SERIAL COMMUNICATIONS UNIT5. At the
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SERIAL COMMUNICATIONS UNITRegister
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SERIAL COMMUNICATIONS UNITRegister
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SERIAL COMMUNICATIONS UNIT3. If the
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SERIAL COMMUNICATIONS UNITThe seria
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SERIAL COMMUNICATIONS UNIT10.2.3 Pr
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SERIAL COMMUNICATIONS UNITBCLK is a
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SERIAL COMMUNICATIONS UNITChannel_0
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SERIAL COMMUNICATIONS UNITmovmovmov
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SERIAL COMMUNICATIONS UNIT10.5.2 Mo
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SERIAL COMMUNICATIONS UNITMASTER186
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SERIAL COMMUNICATIONS UNIT$mod186na
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SERIAL COMMUNICATIONS UNIT$mod186na
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SERIAL COMMUNICATIONS UNITcmp al, F
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SERIAL COMMUNICATIONS UNIT10-36
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CHAPTER 11INPUT/OUTPUT PORTSMany ap
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INPUT/OUTPUT PORTS11.1.2 Input Port
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INPUT/OUTPUT PORTSFrom IntegratedPe
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INPUT/OUTPUT PORTS11.1.5.1 Port 1 O
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INPUT/OUTPUT PORTSRegister Name:Reg
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INPUT/OUTPUT PORTSRegister Name:Reg
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Math Coprocessing12
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MATH COPROCESSING12.3 THE 80C187 MA
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MATH COPROCESSINGAvailable data typ
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MATH COPROCESSING12.3.1.5 Constant
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MATH COPROCESSINGIncreasing Signifi
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MATH COPROCESSING12.4.1 Clocking th
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MATH COPROCESSINGExternalOscillator
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MATH COPROCESSING80C186Modular Core
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MATH COPROCESSING$mod186$modc187nam
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CHAPTER 13ONCE MODEONCE (pronounced
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80C186 InstructionSet Additions and
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80C186 INSTRUCTION SET ADDITIONS AN
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APPENDIX BINPUT SYNCHRONIZATIONMany
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Instruction SetDescriptionsC
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INSTRUCTION SET DESCRIPTIONSTable C
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INSTRUCTION SET DESCRIPTIONSINCINST
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INSTRUCTION SET DESCRIPTIONSOROUTTa
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INSTRUCTION SET DESCRIPTIONSC-48
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APPENDIX DINSTRUCTION SET OPCODESAN
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INSTRUCTION SET OPCODES AND CLOCK C
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Index
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INDEXand T-states, 3-9data phase, 3
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INDEXarithmetic instructions, 2-19-
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INDEXblock diagram, 3-15implementat
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INDEXWWait statesand bus cycles, 3-
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80C186EB/80C188EB Microprocessor User's Manual - CEUNES

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