MC68HC708XL36 FREESCALE [Freescale Semiconductor, Inc], MC68HC708XL36 Datasheet - Page 117
MC68HC708XL36
Manufacturer Part Number
MC68HC708XL36
Description
HCMOS Microcontroller Unit
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC68HC708XL36.pdf
(376 pages)
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DMA/CPU Timing
7-dma_b
MOTOROLA
ADDRESS
CGMOUT
STATE
DATA
BUS
BUS
R/W
Figure 3. Single Byte Transfer Timing (Any DMA Bus Bandwidth)
1
CPU-CONTROLLED BUS CYCLE
2
When the DMA transfers data, it takes control of the address bus, data
bus, and R/W line. During DMA transfers, the CPU clock is suspended.
The state of the CPU remains unchanged until the end of the DMA
transfer when the DMA relinquishes control of the buses and R/W line.
Then the CPU resumes operation as though nothing had happened.
Figure 3
Freescale Semiconductor, Inc.
For More Information On This Product,
3
and
Go to: www.freescale.com
Figure 4
4
5
DMA
show the timing of DMA transfers.
6
7
8
DMA-CONTROLLED BUS CYCLE
9
Functional Description
10
MC68HC708XL36
DMA
117
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