PXS20RM Datasheet, PDF (694/1368 Pages) Freescale Semiconductor, Inc – PXS20 Microcontroller

Flexible Motor Control Pulse Width Modulator Module (FlexPWM)
CX0IE - Capture X 0 Interrupt Enable
This bit allows the CFX0 flag to create an interrupt request to the CPU. Do not set both this bit and
the CX0DE bit.
1 = Interrupt request enabled for CFX0.
0 = Interrupt request disabled for CFX0.
CMPIE - Compare Interrupt Enables
These bits enable the CMPF flags to cause a compare interrupt request to the CPU.
1 = The corresponding CMPF bit will cause an interrupt request.
0 = The corresponding CMPF bit will not cause an interrupt request.
25.4.3.14 DMA Enable Register (DMAEN)
PWM_SUB
_BASE+$1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
E
Read
Write
0
0
0
0
0
0
VAL- FAN
DE D
CAPTDE
0
0
0
0 CX1 CX0
DE DE
Reset
0000000000000000
Figure 25-48. DMA Enable Register (DMAEN)
VALDE - Value Registers DMA Enable
This read/write bit enables DMA write requests for the VALx and FRACx registers when RF is set.
Reset clears VALDE.
1 = DMA write requests for the VALx and FRACx registers enabled
0 = DMA write requests disabled
FAND - FIFO Watermark AND Control
This read/write bit works in conjunction with the CAPTDE field when it is set to watermark mode
(CAPTDE = 01). While the CXxDE bits determine which FIFO watermarks the DMA read request is
sensitive to, this bit determines if the selected watermarks are AND’ed together or OR’ed together in
order to create the request.
1 = Selected FIFO watermarks are AND’ed together.
0 = Selected FIFO watermarks are OR’ed together.
CAPTDE - Capture DMA Enable Source Select
These read/write bits select the source of enabling the DMA read requests for the capture FIFOs. Reset
clears these bits.
• 00 = Read DMA requests disabled.
• 01 = Exceeding a FIFO watermark sets the DMA read request. This requires at least 1 of the
CX1DE or CX0DE bits to also be set in order to determine which watermark(s) the DMA request
is sensitive to.
• 10 = A local sync (VAL1 matches counter) sets the read DMA request.
• 11 = A local reload (RF being set) sets the read DMA request.
25-48
PXS20 Microcontroller Reference Manual, Rev. 1
Freescale Semiconductor