MC68EC060RC50 Freescale Semiconductor, MC68EC060RC50 Datasheet - Page 206

• Manufacturer Part Number: MC68EC060RC50
• Description: IC MPU 32BIT 50MHZ 206-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68EC060RC50

• Processor Type: M680x0 32-Bit
• Speed: 50MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 206-PGA
• Family Name: M68000
• Device Core: ColdFire
• Device Core Size: 32b
• Frequency (max): 50MHz
• Instruction Set Architecture: RISC
• Supply Voltage 1 (typ): 3.3V
• Operating Supply Voltage (max): 3.465V
• Operating Supply Voltage (min): 3.135V
• Operating Temp Range: 0C to 110C
• Operating Temperature Classification: Commercial
• Mounting: Through Hole
• Pin Count: 206
• Package Type: PGA
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Features: -
• Lead Free Status / Rohs Status: Compliant

7.9.3 Double Bus Fault
A double bus fault occurs when an access or address error occurs during the exception pro-
cessing sequence, e.g., the processor attempts to stack several words containing informa-
tion about the state of the machine while processing an access error exception. If a bus error
occurs during the stacking operation, the second error is considered a double bus fault and
the processor is halted.
The MC68060 indicates a double bus fault condition by continuously driving PSTx with an
encoded value of $1C until the processor is reset. Only an external reset operation can
restart a halted processor. The halted processor releases the external bus by negating BR
and forcing all outputs to a high-impedance state.
MOTOROLA
NATIVE-MC68060
ACKNOWLEDGE
ACKNOWLEDGE
TERMINATION
TERMINATION
MISCELLANEOUS
MC68040
MODE
MODE
ATTRIBUTES
SIZ1–SIZ0
A31–A0
D31–D0
BCLK
Figure 7-40. Line Write Retry Bus Cycle Timing
R/W
TEA
TEA
TIP
SAS
TRA
TRA
TS
TA
TA
C1
SIGNALED
RETRY
M68060 USER’S MANUAL
LINE
C2
C1
C2
RETRY CYCLE
C3
C4
C5
Bus Operation
7-51