MC68EC040RC25 Freescale Semiconductor, MC68EC040RC25 Datasheet - Page 172

• Manufacturer Part Number: MC68EC040RC25
• Manufacturer: Freescale Semiconductor

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

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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