Information

PDBx_POEN field descriptions (continued)
Field Description
0 PDB Pulse-Out disabled
1 PDB Pulse-Out enabled
36.3.12 Pulse-Out n Delay Register (PDBx_POnDLY)
Address: 4003_6000h base + 194h offset + (4d × i), where i=0d to 2d
Bit 31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
R
DLY1 DLY2
W
Reset
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
PDBx_POnDLY field descriptions
Field Description
31–16
DLY1
PDB Pulse-Out Delay 1
These bits specify the delay 1 value for the PDB Pulse-Out. Pulse-Out goes high when the PDB counter is
equal to the DLY1. Reading these bits returns the value of internal register that is effective for the current
PDB cycle.
15–0
DLY2
PDB Pulse-Out Delay 2
These bits specify the delay 2 value for the PDB Pulse-Out. Pulse-Out goes low when the PDB counter is
equal to the DLY2. Reading these bits returns the value of internal register that is effective for the current
PDB cycle.
36.4 Functional description
36.4.1 PDB pre-trigger and trigger outputs
The PDB contains a counter whose output is compared against several different digital
values. If the PDB is enabled, a trigger input event will reset the counter and make it start
to count. A trigger input event is defined as a rising edge being detected on selected
trigger input source or software trigger being selected and SC[SWTRIG] is written with
1. For each channel, delay m determines the time between assertion of the trigger input
event to the point at which changes in the pre-trigger m output signal is initiated. The
time is defined as:
Chapter 36 Programmable Delay Block (PDB)
K20 Sub-Family Reference Manual, Rev. 1.1, Dec 2012
Freescale Semiconductor, Inc.
Preliminary
825
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