Chapter 16 Enhanced Direct Memory Access (eDMA)
MPC5606BK Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor
267
16.3.2.12 DMA Clear DONE Status (EDMA_CDSBR)
The EDMA_CDSBR provides a memory-mapped mechanism to clear the DONE bit in the TCD of the
given channel. The data value on a register write causes the DONE bit in the corresponding transfer control
descriptor to be cleared. Setting bit 1 (CDSB[0]) provides a global clear function, forcing all DONE bits
to be cleared. See
for the TCD DONE bit definition.
16.3.2.13 DMA Interrupt Request (EDMA_IRQRL)
The EDMA_IRQRL provides a bit map for the 16 channels signaling the presence of an interrupt request
for each channel. EDMA_IRQRL maps to channels 15–0.
The DMA engine signals the occurrence of a programmed interrupt on the completion of a data transfer
as defined in the transfer control descriptor by setting the appropriate bit in this register. The outputs of
this register are directly routed to the interrupt controller (INTC). During the execution of the interrupt
service routine associated with any given channel, software must clear the appropriate bit, negating the
interrupt request. Typically, a write to the EDMA_CIRQR in the interrupt service routine is used for this
purpose.
The state of any given channel’s interrupt request is directly affected by writes to this register; it is also
affected by writes to the EDMA_CIRQR. On writes to the EDMA_IRQRL, a 1 in any bit position clears
the corresponding channel’s interrupt request. A 0 in any bit position has no affect on the corresponding
channel’s current interrupt status. The EDMA_CIRQR is provided so the interrupt request for a single
channel can be cleared without performing a read-modify-write sequence to the EDMA_IRQRL. See
Offset: 0x001F
Access: Write
0
1
2
3
4
5
6
7
R
0
0
0
0
0
0
0
0
W
CDNE[0:6]
RESET:
0
0
0
0
0
0
0
0
Figure 16-13. DMA Clear DONE Status (EDMA_CDSBR) Register
Table 16-13. EDMA_CDSBR field descriptions
Field
Description
CDNE[0:6]
Clear DONE Status Bit
0–63 Clear the corresponding channel’s DONE bit
64–127 Clear all TCD DONE bits
Summary of Contents for MPC5605BK
Page 2: ...This page is intentionally left blank...
Page 20: ...MPC5606BK Microcontroller Reference Manual Rev 2 20 Freescale Semiconductor...
Page 103: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 103 Clocks and power...
Page 645: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 643 Timers...
Page 715: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 713 ADC system...
Page 787: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 787 Memory...
Page 893: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 893 Integrity...
Page 943: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 943 Debug...