MC68040RC40V Freescale Semiconductor, MC68040RC40V Datasheet - Page 204
MC68040RC40V
Manufacturer Part Number
MC68040RC40V
Description
IC MICROPROCESSOR 32BIT 179-PGA
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68EC040FE33A.pdf
(442 pages)
Specifications of MC68040RC40V
Processor Type
M680x0 32-Bit
Speed
40MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
179-PGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
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illustrated, which results in a memory access having the equivalent of two wait states.
Variations in the timing required by snooping logic to access the caches can delay the
negation of MI by up to two additional clocks. External logic must ensure that the
termination signals negate at all rising BCLK edges in which MI is asserted. Otherwise, if
one of the termination signals is asserted, either the M68040 ignores all termination
signals, reading them as negated, or the M68040 exhibits improper operation.
7-62
SIZ1, SIZ0
*
SC1–SC0
TT1, TT0
AM_BR
AM_BG
AM indicates the alternate bus master.
D31–D0
A31–A0
Figure 7-41. Snoop Access with Memory Response
BCLK
R/W
BR
BG
TS
TA
BB
MI
*
*
Undefined
Freescale Semiconductor, Inc.
C1
For More Information On This Product,
C2
M68040 USER’S MANUAL
Go to: www.freescale.com
C3
ALTERNATE
MASTER
C4
C5
C6
PROCESSOR
MOTOROLA
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