MC68EC040RC25A Freescale Semiconductor, MC68EC040RC25A Datasheet - Page 28

• Manufacturer Part Number: MC68EC040RC25A
• Description: IC MPU 32BIT 25MHZ 179-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC040RC25A

• Processor Type: M680x0 32-Bit
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 179-PGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

Only system programmers can use the supervisor programming model to implement
operating system functions, I/O control, and memory management subsystems. This
supervisor/user distinction in the M68000 family architecture allows for the writing of
application software that executes in the user mode and migrates to the MC68040 from
any M68000 family platform without modification. The supervisor programming model
contains the control features that system designers need to modify system software when
porting to a new design. For example, only the supervisor software can read or write to
the transparent translation registers of the MC68040. The existence of the transparent
translation registers does not affect the programming resources of user application
programs.
MOTOROLA
31
31
REGISTERS
REGISTERS
ADDRESS
DATA
(CCR)
Freescale Semiconductor, Inc.
0
0
For More Information On This Product,
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
A3
A4
A5
A6
A7/USP
PC
CCR
A7'/ISP
A7"/MSP
SR
VBR
SFC
DFC
CACR
URP
SRP
TC
DTT0
DTT1
ITT0
ITT1
MMUSR
Figure 1-2. Programming Model
79
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USER STACK POINTER
CONDITION CODE REGISTER
PROGRAM COUNTER
USER ROOT POINTER REGISTER
INTERRUPT STACK POINTER
MASTER STACK POINTER
STATUS REGISTER (CCR IS ALSO SHOWN IN THE USER PROGRAMMING MODEL)
VECTOR BASE REGISTER
SOURCE FUNCTION CODE
DESTINATION FUNCTION CODE
CACHE CONTROL REGISTER
SUPERVISOR ROOT POINTER REGISTER
TRANSLATION CONTROL REGISTER
DATA TRANSPARENT TRANSLATION REGISTER 0
DATA TRANSPARENT TRANSLATION REGISTER 1
INSTRUCTION TRANSPARENT TRANSLATION REGISTER 0
INSTRUCTION TRANSPARENT TRANSLATION REGISTER 1
MMU STATUS REGISTER
M68040 USER’S MANUAL
SUPERVISOR PROGRAMMING MODEL
USER PROGRAMMING MODEL
FP INSTRUCTION ADDRESS REGISTER
FP CONTROL REGISTER
FP STATUS REGISTER
FLOATING-POINT
REGISTERS
DATA
31
0
15
0
0
FP0
FP1
FP2
FP3
FP4
FP5
FP6
FP7
FPCR
FPSR
FPIAR
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