MC68EC000 Motorola, MC68EC000 Datasheet - Page 90

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

MOTOROLA
IPLB2–IPLB0
SIZ1–SIZ0
FC2–FC0
DTACKB
D15–D8
A31–A4
TSCAE
D7–D0
ERWB
RMCB
A3–A1
UDSB
LDSB
DOEB
AOEB
COEB
RWB
CLKI
DSB
ASB
A0
Figure 4-2. Interrupt Acknowledge Cycle Timing Diagram (Sheet 2 of 3)
*During an IACK cycle, although a vector number is one byte, both data strobes are asserted due to the microcode used for exception processing.
The processor does not recognize anything on D15–D8 at this time.
S7
S0 S1 S2 S3 S4 S5 S6 S7
IACK CYCLE*
Freescale Semiconductor, Inc.
EC000 CORE PROCESSOR USER’S MANUAL
For More Information On This Product,
Go to: www.freescale.com
VECTOR NUMBER
ACQUISITION
JUSTIFY
S0 S1 S2 S3 S4 S5 S6
STACK STATUS
REGISTER
FCx = $5
ON SSP
S7
S0 S1 S2 S3 S4 S5 S6
Exception Processing
STACK UPPER
WORD OF PC
ON SSP
FCx = $5
S7
S0
4-5