MC68040FE25V Freescale Semiconductor, MC68040FE25V Datasheet - Page 178
MC68040FE25V
Manufacturer Part Number
MC68040FE25V
Description
IC MICROPROCESSOR 32BIT 184-CQFP
Manufacturer
Freescale Semiconductor
Datasheet
1.MC68EC040FE33A.pdf
(442 pages)
Specifications of MC68040FE25V
Processor Type
M680x0 32-Bit
Speed
25MHz
Voltage
5V
Mounting Type
Surface Mount
Package / Case
184-CQFP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
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7.6 BUS EXCEPTION CONTROL CYCLES
The M68040 bus architecture requires assertion of TA from an external device to signal
that a bus cycle is complete. TA is not asserted in the following cases:
External circuitry can provide TEA when no device responds by asserting TA within an
appropriate period of time after the processor begins the bus cycle. This allows the cycle
to terminate and the processor to enter exception processing for the error condition. TEA
can also be asserted in combination with TA to cause a retry of a bus cycle in error.
7-36
• The external device does not respond.
• No interrupt vector is provided.
• Various other application-dependent errors occur.
Figure 7-25. Breakpoint Interrupt Acknowledge Bus Cycle Timing
UPA1, UPA0
TM2–TM0
TT1, TT0
D31–D0
A31–A0
CIOUT
BCLK
Freescale Semiconductor, Inc.
SIZ0
SIZ1
R/W
TIP
TA
TS
For More Information On This Product,
ACKNOWLEDGE
C1
BREAKPOINT
M68040 USER’S MANUAL
Go to: www.freescale.com
BYTE
C2
C1
WRITE STACK
C2
MOTOROLA
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