M68000PM Datasheet PDF - Motorola Inc
| Part Number | M68000PM | |
| Description | Integrated Portable System Processor-DragonBall | |
| Manufacturers | Motorola Inc | |
| Logo |  |
|
|
There is a preview and M68000PM download ( pdf file ) link at the bottom of this page. Total 26 Pages | ||
Preview 1 page No Preview Available !
Communications and Advanced
Consumer Technologies Group
Order this document by
M68000UMAD/AD
M68000
Addendum to
M68000
User Manual
August 7, 1997
This addendum to the M68000UM/AD User’s Manual, Revision 8, provides corrections to the original text as
well as additional information. This document and other information on this product is maintained on the World
Wide Web at http://www.motorola.com/68000.
OVERVIEW
This manual includes hardware details and programming information for the MC68HC000, the MC68HC001,
the MC68EC000, and the MC68SEC000. For ease of reading, the name M68000 MPUs will be used when
referring to all processors. Refer to M68000PM/AD, M68000 Programmer's Reference Manual, for detailed
information on the MC68000 instruction set.
The four microprocessors are very similar to each other and all contain the following features:
• Sixteen 32-Bit Data and Address Registers
• 16-Mbyte Direct Addressing Range
• Program Counter
• 6 Instruction Types
• Operations on Five Main Data Types
• Memory-Mapped Input/Output (I/O)
• 14 Addressing Modes
The following processors contain additional features:
• MC68HC001/MC68EC000/MC68SEC000
— Statically selectable 8- or 16-bit data bus
• MC68HC000/MC68EC000/MC68HC001/MC68SEC000
— Low power
This document contains information on a product under development. Motorola reserves the right to change or discontinue this product without notice.
SEMICONDUCTOR PRODUCT INFORMATION
© 1997 Motorola, Inc. All Rights Reserved.
|
| |
 
power consumption to its quiescent value1 while maintaining the internal state of the processor. The
low-power mode described below will be routinely tested as part of the MC68SEC000 test vectors provided
by Motorola.
To successfully enter the low-power mode, the MC68SEC000 must first be in the supervisor mode. A
recommended method for entering the low-power mode is to use the TRAP instruction, which causes the
processor to begin exception processing, thus entering the supervisor mode. External circuitry should
accomplish the following steps during the trap routine:
1. Externally detect a write to the low-power address. You select this address which can be any address
in the 16 Mbyte addressing range of the MC68SEC000. A write to the low-power address can be
detected by polling A23–A0, R/W, and FC2–FC0. When the low-power address is detected, R/W is
a logic low, and the function codes have a five (101) on their output, the processor is writing to the
low-power address in supervisor mode and user-designed circuitry should assert the
ADDRESS_MATCH signal shown in Figure 2 and Figure 3.
ADDRESS_MATCH
AS
DQ
CK AS
Q
CL
DQ
CK
Q
CL
DQ
CK
Q
CPU_CLK
RESTART
RESET
SYSTEM_CLK
Figure 2. MC68SEC000 Low-Power Circuitry for 16-Bit Data Bus
ADDRESS_MATCH
AS
DQ
CK AS
Q
CL
DQ
CK AS
Q
CL
DQ
CK
Q
CL
DQ
CK
Q
CPU_CLK
RESTART
RESET
SYSTEM_CLK
Figure 3. MC68SEC000 Low-Power Circuitry for 8-Bit Data Bus
2. Execute the STOP instruction. The external circuitry shown in Figure 2 and Figure 3 will count the
number of bus cycles starting with the write to the low-power address and will stop the processor
clock on the first falling edge of the system clock after the bus cycle that reads the immediate data
of the STOP instruction. Figure 3 has one more flip-flop than Figure 2 because the MC68SEC000 in
1. The preliminary specification for the MC68SEC000’s current drain while in the low-power mode is Idd < 2µA for 3.3V operation and
Idd < 5µA for 5.0V operation.
5
M68000 USER’S MANUAL ADDENDUM
MOTOROLA
Preview 5 Page |
Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for M68000PM electronic component. |
| Information | Total 26 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ M68000PM.PDF Datasheet ] | |
Share Link :
Electronic Components Distributor
|
An electronic components distributor is a company that sources, stocks, and sells electronic components to manufacturers, engineers, and hobbyists. |
| SparkFun Electronics | Allied Electronics | DigiKey Electronics | Arrow Electronics |
| Mouser Electronics | Adafruit | Newark | Chip One Stop |
Featured Datasheets
| Part Number | Description | MFRS |
| M68000PM | The function is Addendum to M68000 User Manual. Motorola Inc | |
| M68000PM | The function is Integrated Portable System Processor-DragonBall. Motorola Inc | |
Semiconductors commonly used in industry:
1N4148 |
BAW56 |
1N5400 |
NE555 | | ||
Quick jump to:
M680
1N4
2N2
2SA
2SC
74H
BC
HCF
IRF
KA | ||