M68040 datasheet(13/442 Pages) FREESCALE

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MOTOROLA

M68040 USER’S MANUAL

TABLE OF CONTENTS (Continued)

Paragraph

Page

Number

Title

Number

B.4

Special Modes Of Operation .................................................................B-8

B.5

Exception Processing............................................................................ B-10

B.5.1

Unimplemented Floating-Point Instructions and Exceptions ............. B-10

B.5.2

MC68EC040 Stack Frames ...............................................................B-11

B.6

Software Considerations .......................................................................B-12

B.7

MC68EC040 Electrical Characteristics ................................................. B-12

B.7.1

Maximum Ratings ..............................................................................B-12

B.7.2

Thermal Characteristics .....................................................................B-12

B.7.3

DC Electrical Specifications ...............................................................B-13

B.7.4

Power Dissipation ..............................................................................B-13

B.7.5

Clock AC Timing Specifications .........................................................B-14

B.7.6

Output AC Timing Specifications ....................................................... B-15

B.7.7

Input AC Timing Specifications..........................................................B-16

Appendix C

MC68040V and MC68EC040V

C.1

Additional Signals.................................................................................. C-1

C.1.1

Low Frequency Operation (LFO) .......................................................C-2

C.1.2

Loss of Clock (LOC) .......................................................................... C-2

C.1.3

System Clock Disable (SCD)............................................................. C-2

C.2

Low-Power Stop Mode ..........................................................................C-3

C.2.1

Bus Arbitration and Snooping ............................................................C-5

C.2.2

Low Frequency Operation ................................................................. C-5

C.2.3

Changing BCLK Frequency ...............................................................C-5

C.2.4

LPSTOP Instruction Summary ..........................................................C-6

C.3

Clocking During Normal Operation .......................................................C-7

C.4

Reset Operation ....................................................................................C-7

C.5

Power Cycling .......................................................................................C-9

C.6

MC68040V and MC68EC040V JTAG (Preliminary) .............................. C-10

C.6.1

Instruction Shift Register ...................................................................C-11

C.6.1.1

EXTEST .........................................................................................C-12

C.6.1.2

HIGHZ ............................................................................................C-12

C.6.1.3

SAMPLE/PRELOAD ...................................................................... C-12

C.6.1.4

CLAMP........................................................................................... C-12

C.6.1.5

BYPASS......................................................................................... C-13

C.6.2

Boundary Scan Register.................................................................... C-13

C.6.3

Restrictions ........................................................................................C-16

C.6.4

Disabling The IEEE Standard 1149.1A Operation............................. C-16

C.6.5

MC68040V and MC68EC040V JTAG Electrical Characteristics ....... C-17

Freescale Semiconductor, Inc.

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