MC68EC040RC25 Freescale Semiconductor, MC68EC040RC25 Datasheet - Page 226
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MC68EC040RC25
Manufacturer Part Number
MC68EC040RC25
Description
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68EC040RC25.pdf
(442 pages)
Specifications of MC68EC040RC25
Family Name
M68000
Device Core
ColdFire
Device Core Size
32b
Frequency (max)
25MHz
Instruction Set Architecture
RISC
Operating Temp Range
0C to 70C
Operating Temperature Classification
Commercial
Mounting
Through Hole
Pin Count
179
Package Type
PGA
Lead Free Status / Rohs Status
Supplier Unconfirmed
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Freescale Semiconductor, Inc.
level 6 interrupt, the SR mask is automatically updated with a value of 6 before entering
the handler routine so that subsequent level 6 interrupts and lower level interrupts are
masked. Provided no instruction that lowers the mask value is executed, the external
request can be lowered to level 3 and then raised back to level 6 and a second level 6
interrupt is not processed. However, if the M68040 is handling a level 7 interrupt (SR
mask set to level 7) and the external request is lowered to level 3 and than raised back to
level 7, a second level 7 interrupt is processed. The second level 7 interrupt is processed
because the level 7 interrupt is transition sensitive. A level comparison also generates a
level 7 interrupt if the request level and mask level are at 7 and the priority mask is then
set to a lower level (with the MOVE to SR or RTE instruction, for example). The level 6
interrupt request and mask level example in Figure 8-3 is the same as for all interrupt
levels except 7.
MOTOROLA
M68040 USER’S MANUAL
8- 13
For More Information On This Product,
Go to: www.freescale.com
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