MC68HC000RC16 Freescale Semiconductor, MC68HC000RC16 Datasheet - Page 71

• Manufacturer Part Number: MC68HC000RC16
• Description: IC MPU 32BIT 16MHZ 68-PGA
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC000RC16

• Processor Type: M680x0 32-Bit
• Speed: 16MHz
• Voltage: 3.3V, 5V
• Mounting Type: Surface Mount
• Package / Case: 68-PGA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Features: -

After the aborted bus cycle is terminated and BERR is negated, the processor enters
exception processing for the bus error exception. During the exception processing
sequence, the following information is placed on the supervisor stack:
The first two items are identical to the information stacked by any other exception. The
error information differs for the MC68010. The MC68000, MC68HC000, MC68HC001,
MC68EC000, and MC68008 stack bus error information to help determine and to correct
the error. The MC68010 stacks the frame format and the vector offset followed by 22
words of internal register information. The return from exception (RTE) instruction restores
the internal register information so that the MC68010 can continue execution of the
instruction after the error handler routine completes.
After the processor has placed the required information on the stack, the bus error
exception vector is read from vector table entry 2 (offset $08) and placed in the program
counter. The processor resumes execution at the address in the vector, which is the first
instruction in the bus error handler routine.
MOTOROLA
1. Status register
2. Program counter (two words, which may be up to five words past the instruction
3. Error information
being executed)
FC2–FC0
UDS/LDS
D15–D0
A23–A1
DTACK
BERR
HALT
R/W
CLK
AS
Figure 5-26. Delayed Bus Error Timing Diagram (MC68010)
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
S0
READ CYCLE
Freescale Semiconductor, Inc.
S2
For More Information On This Product,
S4
Go to: www.freescale.com
S6
BUS ERROR
DETECTION
ERROR STACKING
INITIATE BUS
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