MC68040RC40V Freescale Semiconductor, MC68040RC40V Datasheet - Page 172
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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The M68040 asserts IPEND when an interrupt request is pending. Figure 7-20 illustrates
the assertion of IPEND relative to the assertion of an interrupt level on the IPL≈ signals.
IPEND signals external devices that an interrupt exception will be taken at an upcoming
instruction boundary (following any higher priority exception). The IPEND signal negates
after the processor recognizes the internal interrupt acknowledge and can precede the
external interrupt acknowledge bus cycle.
7-30
COMPARE REQUEST WITH MASK IN SR
IPLs RECOGNIZED
IPL2–IPL0
OTHERWISE
Figure 7-19. Interrupt Pending Procedure
IPLs SYNCHRONIZED
IPEND
BCLK
Freescale Semiconductor, Inc.
For More Information On This Product,
Figure 7-20. Assertion of
M68040 USER’S MANUAL
Go to: www.freescale.com
SAMPLE AND SYNCHRONIZE
ASSERT IPEND
IPL2–IPL0
RESET
INTERRUPT LEVEL I2–I0,
OR TRANSITION ON LEVEL 7
IPEND
ASSERT IPEND
>
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