mcf51jf128 Freescale Semiconductor, Inc, mcf51jf128 Datasheet - Page 732

• Manufacturer Part Number: mcf51jf128
• Description: Mcf51jf128 Reference Manual
• Manufacturer: Freescale Semiconductor, Inc

Memory Map and Register Definition
732
PRESCALER
TRGSEL
DMAEN
PDBEN
14–12
11–8
Field
15
7
When PDB is enabled and the software trigger is selected as the trigger input source, writing 1 to this bit
reset and restarts the counter. Writing 0 to this bit has no effect. Reading this bit results 0.
DMA Enable
When DMA is enabled, the PDBIF flag generates a DMA request instead of an interrupt.
0
1
Prescaler Divider Select
000
001
010
011
100
101
110
111
Trigger Input Source Select
Selects the trigger input source for the PDB. The trigger input source can be internal or external (EXTRG
pin), or the software trigger.
0000
0001
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
PDB Enable
0
1
DMA disabled
DMA enabled
PDB disabled. Counter is off and all pre-trigger and trigger outputs are low.
PDB enabled
Counting uses the peripheral clock divided by multiplication factor selected by MULT.
Counting uses the peripheral clock divided by twice of the multiplication factor selected by MULT.
Counting uses the peripheral clock divided by four times of the multiplication factor selected by
MULT.
Counting uses the peripheral clock divided by eight times of the multiplication factor selected by
MULT.
Counting uses the peripheral clock divided by 16 times of the multiplication factor selected by
MULT.
Counting uses the peripheral clock divided by 32 times of the multiplication factor selected by
MULT.
Counting uses the peripheral clock divided by 64 times of the multiplication factor selected by
MULT.
Counting uses the peripheral clock divided by 128 times of the multiplication factor selected by
MULT.
Trigger-In 0 is selected
Trigger-In 1 is selected
Trigger-In 2 is selected
Trigger-In 3 is selected
Trigger-In 4 is selected
Trigger-In 5 is selected
Trigger-In 6 is selected
Trigger-In 7 is selected
Trigger-In 8 is selected
Trigger-In 9 is selected
Trigger-In 10 is selected
Trigger-In 11 is selected
Trigger-In 12 is selected
Trigger-In 13 is selected
Trigger-In 14 is selected
Software trigger is selected
MCF51JF128 Reference Manual, Rev. 2, 03/2011
PDBx_SC field descriptions (continued)
Table continues on the next page...
Preliminary
Description
Freescale Semiconductor, Inc.