MC68HC000RC10 Freescale Semiconductor, MC68HC000RC10 Datasheet - Page 57

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MC68HC000RC10

Manufacturer Part Number
MC68HC000RC10
Description
IC MPU 32BIT 10MHZ 68-PGA
Manufacturer
Freescale Semiconductor
Datasheet

Specifications of MC68HC000RC10

Processor Type
M680x0 32-Bit
Speed
10MHz
Voltage
3.3V, 5V
Mounting Type
Surface Mount
Package / Case
68-PGA
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Features
-

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MC68HC000RC10
Manufacturer:
TI
Quantity:
780
The breakpoint acknowledge cycle is performed by the MC68010 to provide an indication
to hardware that a software breakpoint is being executed when the processor executes a
breakpoint (BKPT) instruction. The processor neither accepts nor sends data during this
cycle, which is otherwise similar to a read cycle. The cycle is terminated by either DTACK,
BERR, or as an M6800 peripheral cycle when V P A is asserted, and the processor
continues illegal instruction exception processing. Figure 5-12 illustrates the timing
diagram for the breakpoint acknowledge cycle.
5.2 BUS ARBITRATION
Bus arbitration is a technique used by bus master devices to request, to be granted, and
to acknowledge bus mastership. Bus arbitration consists of the following:
There are two ways to arbitrate the bus, 3-wire and 2-wire bus arbitration. The MC68000,
MC68HC000, MC68EC000, MC68HC001, MC68008, and MC68010 can do 2-wire bus
arbitration. The MC68000, MC68HC000, MC68HC001, and MC68010 can do 3-wire bus
arbitration. Figures 5-13 and 5-15 show 3-wire bus arbitration and Figures 5-14 and 5-16
show 2-wire bus arbitration. Bus arbitration on all microprocessors, except the 48-pin
MC68008 and MC68EC000, BGACK must be pulled high for 2-wire bus arbitration.
MOTOROLA
1. Asserting a bus mastership request
2. Receiving a grant indicating that the bus is available at the end of the current cycle
3. Acknowledging that mastership has been assumed
FC2–FC0
A23–A1
D15–D8
DTACK
D7–D0
UDS
LDS
CLK
R/W
AS
Figure 5-12. Breakpoint Acknowledge Cycle Timing Diagram
S0
M68000 8-/16-/32-BIT MICROPROCESSORS USER'S MANUAL
S2
WORD READ
Freescale Semiconductor, Inc.
For More Information On This Product,
S4
S6
Go to: www.freescale.com
S0
BREAKPOINT
S2
CYCLE
S4
S6
S0
STACK PC LOW
S2
S4
S6
5- 11

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