MC68EC000 Motorola, MC68EC000 Datasheet - Page 94

• Manufacturer Part Number: MC68EC000
• Description: Core Processor (SCM 68000)
• Manufacturer: Motorola

for AVECB to identify an autovectored interrupt acknowledge cycle. If both signals are
asserted, the operation of the state machine is unpredictable.
MOTOROLA
Figure 4-4. Autovector Operation Timing Diagram—Best Case
DATA OUT
SIZ1–SIZ0
TESTCLK
FC2–FC0
DTACKB
DATA IN
A31–A4
AVECB
TSCAE
A3–A1
ERWB
RMCB
COEB
DOEB
UDSB
AOEB
LDSB
NOTE:
RWB
CLKI
DSB
ASB
A0
Freescale Semiconductor, Inc.
Although both UDSB and LDSB are asserted, no data is read from the bus during the
autovector cycle. The vector number is generated internally.
EC000 CORE PROCESSOR USER’S MANUAL
For More Information On This Product,
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Go to: www.freescale.com
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Exception Processing
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