MC68MH360EM25L Freescale Semiconductor, MC68MH360EM25L Datasheet - Page 124

• Manufacturer Part Number: MC68MH360EM25L
• Description: IC MPU QUICC ETHER 25MHZ 240FQFP
• Manufacturer: Freescale Semiconductor

Specifications of MC68MH360EM25L

• Processor Type: M683xx 32-Bit
• Speed: 25MHz
• Voltage: 5V
• Mounting Type: Surface Mount
• Package / Case: 240-FQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -

Bus Operation
4.5.4 Double Bus Fault
A double bus fault results when a bus error or an address error occurs during the exception
processing sequence for any of the following:
For example, the QUICC attempts to stack several words containing information about the
state of the machine while processing a bus error exception. If a bus error exception occurs
during the stacking operation, the second error is considered a double bus fault. When a
double bus fault occurs, the QUICC halts and drives the HALT line low. Only a reset opera-
tion can restart a halted QUICC. However, bus arbitration can still occur (refer to 4.6 Bus
Arbitration). A second bus error or address error that occurs after exception processing has
4-48
1. A previous bus error
2. A previous address error
3. A reset
FC3–FC0
DSACKx
D31–D0
A31–A0
BGACK
CLKO1
HALT
R/W
DS
BR
BG
AS
S0
Freescale Semiconductor, Inc.
For More Information On This Product,
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READ
Figure 4-33. HALT Timing
MC68360 USER’S MANUAL
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Go to: www.freescale.com
WHILE THE PROCESSOR IS
(ARBITRATION PERMITTED
HALTED)
HALT
S0
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READ
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S0
MOTOROLA