MC68LC040RC25A Datasheet, PDF (387/442 Pages) Freescale Semiconductor, Inc – M68040 Users Manual

Freescale Semiconductor, Inc.
MC68EC040 REV2.3 (01/31/2000)
The PTEST and PFLUSH instructions should not be executed. Execution of the PTEST
instruction causes random bus cycles to occur. Execution of the PFLUSH instruction
produces indeterminate results. Neither instruction causes the MC68EC040 to generate an
exception.
The CPUSH and CINV instructions require special consideration. A page is defined as a
4-Kbyte block of external memory. The CPUSH and CINV page instruction opcodes can be
used to push or invalidate 4-Kbyte blocks of memory. The MC68EC040 does not support
8-Kbyte pages.
The MOVEC to URP and SRP instructions are not valid and will produce indeterminate
results. Each ACU has a status register and translation control register that replace the MMU
status register and translation control register of the MC68040. The MMU status register
opcode of the MOVEC instruction can modify the ACU status register. The MC68EC040
ACU status register does not provide additional functionality to the ACU and is only provided
for compatibility with the ACU MC68EC030 status register. The ACU status register may not
be implemented in future M68EC0X0 products.
B.7 MC68EC040 ELECTRICAL CHARACTERISTICS
The following paragraphs provide information on the maximum rating and thermal charac-
teristics for the MC68EC040 only. Refer to Appendix C MC68040V and MC68EC040V for
more information on electrical characteristics for the MC68EC040V. This section is subject
to change. For the most recent specifications, contact a Motorola sales office or complete
the registration card at the end of this manual.
B.7.1 Maximum Ratings
Characteristic
Supply Voltage
Input Voltage
Maximum Operating Junction Temperature
Minimum Operating Ambient Temperature
Storage Temperature Range
Table 12-2.
Symbol
V_CC
V_in
T_J
T_A
T_stg
Value
–0.3 to +7.0
–0.5 to +7.0
110
0
–55 to 150
Unit This device contains protective
circuitry against damage due to
V high static voltages or electrical
fields; however, it is advised that
V
normal precautions be taken to
avoid application of any voltages
higher than maximum-rated
°C _{voltages to this high-impedance}
circuit. Reliablity of operation is
°C enhanced if unused inputs are
tied to an appropriate logic
°C
voltage level (e.g., either GND or
V_CC).
B.7.2 Thermal Characteristics
Characteristic
Thermal Resistance, Junction to Case—
PGA Package
Symbol
θ_JC
Value
3
Rating
°C/W
MOTOROLA
M68040 USER’S MANUAL
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