MC68HC08XL36 Datasheet, PDF (124/362 Pages) Freescale Semiconductor, Inc – HCMOS Microcontroller Unit

DMA
Freescale Semiconductor, Inc.
15
0
CHANNEL x SOURCE BASE ADDRESS
SOURCE ADDRESS
15
0
CHANNEL x DESTINATION BASE ADDRESS
DESTINATION ADDRESS
7
0
CHANNEL x BYTE COUNT
+1
7
0
CHANNEL x CONTROL
7
0
CHANNEL x BLOCK LENGTH
NOTE:
=?
When byte count = block length, the CPU
interrupt flag (IFCx) is set and the byte count
is reset.
If in loop mode (Lx = 1), leave TECx set.
If in finite transfer mode (Lx = 0), clear TECx.
Figure 13. Static Source and Static Destination
Table 4. DMA Address Calculation (Byte Mode)
MC68HC08XL36
124
From To From To From To
1 S⁽¹⁾ D⁽²⁾
S
DS
D
2 S D S +1 D S D +1
3 S D S +2 D S D +2
4 S D S +3 D S D +3
From
S
S –1
S –2
S –3
To From
DS
DS
DS
DS
To
D
D –1
D –2
D –3
n S D S +n –1 D S D +n –1 S –(n –1) D S D –(n –1)
1. S = Source base address
2. D = Destination base address
Direct Memory Access Module (DMA)
For More Information On This Product,
Go to: www.freescale.com
18-dma_b
MOTOROLA