MC68EC040FE40A Freescale Semiconductor, MC68EC040FE40A Datasheet - Page 178

• Manufacturer Part Number: MC68EC040FE40A
• Description: IC MPU 32BIT 40MHZ 184-CQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC040FE40A

• Processor Type: M680x0 32-Bit
• Speed: 40MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 184-CQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

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