MC68SEC000AA20B1

4 MC68SEC000 PRODUCT INFORMATION MOTOROLA
Figure 2. Functional Signal Groups
Address Bus (A23-A0)
This 24-bit, unidirectional, three-state bus can address 16 Mbytes of data. It provides the address for bus
operation during all cycles except interrupt cycles. During interrupt cycles, A3, A2, and A1 reflect the level
of the interrupt being serviced, while A23-A4 and A0 are set to a logic high.
Data Bus (D15-D0)
This 16-bit, bidirectional, three-state bus is the general-purpose data path. Using the mode pin, you can
statically select either 8- or 16-bit modes for data transfer.
Asynchronous Bus Control
Asynchronous data transfers are handled using the following control signals: address strobe (AS
), read/
write (R/W), upper and lower data strobes (UDS, LDS), and data transfer acknowledge (DTACK). The
address strobe signal indicates there is a valid address on the address bus. Read/write defines the data bus
transfer as a read or write cycle. The data strobes control the flow of data on the data bus and the data
transfer acknowledge indicates that the data transfer is complete.
Bus Arbitration Control
In multiple bus master systems, the bus arbitration circuit determines which device will be the bus master.
The bus request (BR
) indicates that an external device requires bus mastership. A bus grant (BG) indicates
to all other potential bus master devices that the controller will release bus control at the end of the current
bus cycle.
ADDRESS BUS
DATA BUS
ASYNCHRONOUS
BUS CONTROL
BUS ARBITRATION
CONTROL
INTERRUPT
CONTROL
PROCESSOR
STATUS
A23-A0
D15-D0
AS
R/W
UDS
LDS
DTACK
BERR
RESET
HALT
MODE
SYSTEM
CONTROL
V
CC
GND
CLK
MC68SEC000
FC0
FC1
FC2
IPL0
IPL1
IPL2
AVEC
BR
BG
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MOTOROLA MC68SEC000 PRODUCT INFORMATION 5
Interrupt Control
The MC68SEC000 provides seven levels of interrupts. The interrupt priority level (IPL2
, IPL1, IPL0) inputs
determine the priority level. Level 7 is nonmaskable and is the highest priority interrupt. Automatic vectoring,
based on IPL inputs, is available with the autovector (AVEC) input.
System Control
The system control inputs include the RESET
, HALT, BERR, and MODE signals. These signals can reset
or halt the controller, indicate to the controller that a bus error has occurred, and select from 8- or 16-bit
operating mode.
Processor Status (FC2, FC1, FC0)
These active-high, three-state function code outputs indicate the mode (user or supervisor) and the address
space currently being accessed. The function code outputs are valid whenever AS
is active.
PACKAGE DIAGRAM
The following package diagram applies to both the plastic QFP and TQFP packages of the MC68SEC000.
Figure 3. MC68SEC000 Package Diagram
A19
A18
A17
A16
A15
A14
A13
V
CC
D13
D14
D15
A20
A21
A23
A22
D5
D6
D7
D4
D3
D2
D1
D0
AS
R/W
LDS
UDS
D8
D9
D10
D11
D12
A12
A11
A10
A9
A8
A7
A6
A5
FC0
A0
A1
A3
GND
A4
A2
FC1
CLK
DTACK
BG
BR
HALT
RESET
BERR
IPL1
V
CC
MODE
GND
IPL2
AVEC
1
16
17
33
32
64
48
49
64 LEAD QFP and TQFP
IPL0
FC2
GND
MC68SEC000
MC68SEC000
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SEMICONDUCTOR PRODUCT INFORMATION
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Literature Distribution Centers:
USA/EUROPE: Motorola Literature Distribution; P.O. Box 20912, Arizona 85036.
JAPAN: Nippon Motorola Ltd.; 4-32-1, Nishi-Gotanda, Shinagawa-ku, Tokyo 141 Japan.
ASIA-PACIFIC: Motorola Semiconductors H.K. Ltd.; Silicon Harbour Center, No. 2 Dai King Street, Tai Po Industrial Estate,
Tai Po, N.T., Hong Kong.
ORDERING INFORMATION
The following table contains the ordering information for the MC68SEC000.
DEVELOPER TOOLS
All of the existing third-party developer tools widely available for the MC68EC000 will directly support the
MC68SEC000. You can find detailed descriptions of these tools in the
High Performance Embedded Systems
Source Catalog
(Revision 4).
DOCUMENTATION
The documents listed in the following table contain detailed information that pertain to the MC68SEC000
processor. These documents can be obtained from the Literature Distribution Centers at the addresses listed
on the last page of this document.
MC68SEC000 Ordering Information
PACKAGE BODY SIZE LEAD SPACING SPEED VOLTAGE SUFFIX
TEMPERATURE
RANGE
QFP 14.0 mm X 14.0mm 0.8mm
10/16/20 MHz 3.3V or 5.0V
FU 0C to +70C
CFU -40C to +85C
TQFP 10.0mm x 10.0mm 0.5mm PB 0C to +70C
CPB -40C to +85C
MC68SEC000 DOCUMENTATION
MC68SEC000 DOCUMENTATION DOCUMENT NUMBER AVAILABILITY
M68000 Family
Programmer’s Reference Manual
M68000PM/AD Now
M68000 User’s Manual Revision 8 M68000UM/AD Now
Addendum to M68000 8-/16-/32- Bit
Microprocessor Users Manual Revision 8
M68000UMAD/AD Now
High Performance Embedded Systems
Source Catalog Revision 4
BR729/D Rev. 4 Now
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MC68SEC000AA20B1

Mfr. #:
Manufacturer:
NXP / Freescale
Description:
Microprocessors - MPU 8/16/32 BIT MPU STATIC
Lifecycle:
New from this manufacturer.
Delivery:
DHL FedEx Ups TNT EMS
Payment:
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