M68000 Microprocessor User's Manual

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31 16 15 8 7 0 D0 D1 D2 D3 D4 D5 D6 D7 EIGHT DATA REGISTERS 31 16 15 0 A0 A1 A2 A3 A4 A5 A6 SEVEN ADDRESS REGISTERS 31 0 7 0 A7 (USP) PC CCR USER STACK POINTER PROGRAM COUNTER STATUS REGISTER Figure 2-1. User Programmer's Model (MC68000/MC68HC000/MC68008/MC68010) 2.1.2 Supervisor Programmer's Model The supervisor programmer's model consists of supplementary registers used in the supervisor mode. The M68000 MPUs contain identical supervisor mode register resources, which are shown in Figure 2-2, including the status register (high-order byte) and the supervisor stack pointer (SSP/A7'). 31 16 15 0 A7' (SSP) SUPERVISOR STACK POINTER 15 8 7 0 CCR SR STATUS REGISTER Figure 2-2. Supervisor Programmer's Model Supplement The supervisor programmer's model supplement of the MC68010 is shown in Figure 2- 3. In addition to the supervisor stack pointer and status register, it includes the vector base register (VRB) and the alternate function code registers (AFC).The VBR is used to determine the location of the exception vector table in memory to support multiple vector 2-2 M68000 8-/16-/32-BIT MICROPROCESSOR USER’S MANUAL MOTOROLA
tables. The SFC and DFC registers allow the supervisor to access user data space or emulate CPU space cycles. 31 16 15 0 A7' (SSP) SUPERVISOR STACK POINTER 15 8 7 0 CCR SR STATUS REGISTER 31 0 2 0 VBR SFC DFC VECTOR BASE REGISTER ALTERNATE FUNCTION CODE REGISTERS Figure 2-3. Supervisor Programmer's Model Supplement (MC68010) 2.1.3 Status Register The status register (SR),contains the interrupt mask (eight levels available) and the following condition codes: overflow (V), zero (Z), negative (N), carry (C), and extend (X). Additional status bits indicate that the processor is in the trace (T) mode and/or in the supervisor (S) state (see Figure 2-4). Bits 5, 6, 7, 11, 12, and 14 are undefined and reserved for future expansion SYSTEM BYTE USER BYTE 15 13 10 8 4 0 T S I2 I1 I0 X N Z V C TRACE MODE SUPERVISOR STATE INTERRUPT MASK EXTEND NEGATIVE ZERO OVERFLOW CARRY CONDITION CODES Figure 2-4. Status Register 2.2 DATA TYPES AND ADDRESSING MODES The five basic data types supported are as follows: 1. Bits 2. Binary-Coded-Decimal (BCD) Digits (4 Bits) 3. Bytes (8 Bits) 4. Words (16 Bits) 5. Long Words (32 Bits) MOTOROLA M68000 8-/16-/32-BIT MICROPROCESSOR USER’S MANUAL 2-3
Page 1 and 2: µ MOTOROLA M68000 8-/16-/32-Bit Mi
Page 3 and 4: TABLE OF CONTENTS (Continued) Parag
Page 5 and 6: TABLE OF CONTENTS (Continued) Parag
Page 7 and 8: LIST OF ILLUSTRATIONS Figure Page N
Page 9 and 10: LIST OF ILLUSTRATIONS (Concluded) F
Page 11 and 12: LIST OF TABLES (Concluded) Table Pa
Page 13 and 14: 1.1 MC68000 The MC68000 is the firs
Page 15: SECTION 2 INTRODUCTION The section
Page 19 and 20: Register Direct Addressing Data Reg
Page 21 and 22: BIT DATA 1 BYTE = 8 BITS 7 6 5 4 3
Page 23 and 24: Notation for operands: PC — Progr
Page 25 and 26: Table 2-2. Instruction Set Summary
Page 27 and 28: Table 2-2. Instruction Set Summary
Page 29 and 30: SECTION 3 SIGNAL DESCRIPTION This s
Page 31 and 32: V CC (2) GND(2) CLK ADDRESS BUS DAT
Page 33 and 34: Table 3-1. Data Strobe Control of D
Page 35 and 36: 3.6 SYSTEM CONTROL The system contr
Page 37 and 38: Table 3-3. Function Code Outputs Fu
Page 39 and 40: SECTION 4 8-BIT BUS OPERATION The f
Page 41 and 42: A bus cycle consists of eight state
Page 43 and 44: The descriptions of the eight state
Page 45 and 46: CLK S0 S1 S2 S3 S4 S5 S6 S7 S8 S9 S
Page 47 and 48: SECTION 5 16-BIT BUS OPERATION The
Page 49 and 50: CLK S0 S1 S2 S3 S4 S5 S6 S7 S0 S1 S
Page 51 and 52: The word and byte write-cycle timin
Page 53 and 54: STATE 7 On the falling edge of the
Page 55 and 56: STATE 12 STATE 13 STATE 14 STATE 15
Page 57 and 58: The breakpoint acknowledge cycle is
Page 59 and 60: PROCESSOR REQUESTING DEVICE REQUEST
Page 61 and 62: us request signal. When no acknowle
Page 63 and 64: RA 1 RA GT 1 XA RA GT RA GT RA XX R
Page 65 and 66: BUS RELEASED FROM THREE STATE AND P
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BUS THREE-STATED BG ASSERTED BR VAL
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BUS THREE-STATED BG ASSERTED BR VAL
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CLK S0 S2 S4 S6 FC2-FC0 A23-A1 AS U
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CLK S0 S2 S4 S6 S0 S2 S4 S6 FC2-FC0
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A double bus fault occurs during a
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Case No. Control Signal 1 DTACK BER
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ADDR AS R/W UDS/LDS DATA DTACK Figu
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ADDR 11 AS 20A R/W 22 UDS/LDS 55 26
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On the rising edge of the clock, at
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Parameter #47 of Section 10 Electri
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The privilege mode is a mechanism f
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6.2 EXCEPTION PROCESSING The proces
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equests from peripheral devices for
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6.2.3 Multiple Exceptions These par
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SSP EVEN BYTE ODD BYTE 7 0 7 0 15 0
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interrupt priority mask is set at l
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A signed divide (DIVS) or unsigned
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After the execution of the instruct
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. 15 14 13 12 11 10 9 8 7 6 5 4 3 2
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6.4 RETURN FROM EXCEPTION (MC68010)
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Table 7-1. Effective Address Calcul
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In Table 7-5, the following notatio
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CLR Table 7-7. Single Operand Instr
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7.9 JMP, JSR, LEA, PEA, AND MOVEM I
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Table 7-13. Miscellaneous Instructi
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SECTION 8 16-BIT INSTRUCTION EXECUT
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Table 8-3. Move Long Instruction Ex
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Table 8-5. Immediate Instruction Ex
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8.7 BIT MANIPULATION INSTRUCTION EX
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Table 8-11. Multiprecision Instruct
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the handler routine. The total numb
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9.1 OPERAND EFFECTIVE ADDRESS CALCU
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Table 9-4. Move Long Instruction Ex
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9.4 IMMEDIATE INSTRUCTION EXECUTION
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Table 9-11. Single Operand Instruct
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Table 9-15. Conditional Instruction
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Table 9-18. Miscellaneous Instructi
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SECTION 10 ELECTRICAL AND THERMAL C
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Table 10-1 summarizes maximum power
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is lost through the active P-channe
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10.6 MC68000/68008/68010 DC ELECTRI
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. 10.9 MC68008 AC ELECTRICAL SPECIF
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Num Characteristic 8 MHz* 10 MHz* 1
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S0 S1 S2 S3 S4 S5 S6 S7 CLK 6A FC2-
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10.11 AC ELECTRICAL SPECIFICATIONS
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10.12 AC ELECTRICAL SPECIFICATIONS
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CLK 47 33 BR BG 1 BGACK 35 47 34 37
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CLK 47 33 BR BG 1 BGACK 35 47 34 37
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10.13 MC68EC000 DC ELECTRICAL SPECI
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Num Characteristic 8 MHz 10 MHz 12.
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S0 S1 S2 S3 S4 S5 S6 S7 CLK 6A FC2-
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CLK 47 33 BR 34 35 36 BG 39 38 58 A
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11-2 M68000 8-/16-/32-BIT MICROPROC
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R/W LDS UDS AS D0 D1 D2 D3 D4 D5 D6
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A3 1 48 A2 A4 2 47 A1 A5 3 46 A0 A6
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64 33 L SUFFIX 746-03 B 1 32 A F C
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64 33 L SUFFIX 746-01 B 1 32 A F C
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Figure 11-11. Case 765A-05—RC Suf
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1. Fetch the MOVE instruction. 2. F
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M68000 Microprocessor User's Manual

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