PXR40RM Datasheet, PDF (551/1434 Pages) Freescale Semiconductor, Inc – PXR40 Microcontroller

Enhanced Direct Memory Access Controller (eDMA)
21.3.2.9 eDMA Clear Interrupt Request Register (EDMA_x_CIRQR)
The EDMA_x_CIRQR provides a memory-mapped mechanism to clear a given bit in the
EDMA_A_IRQRH or EDMA_x_IRQRL to disable the interrupt request for a given channel. The given
value on a register write causes the corresponding bit in the EDMA_A_IRQRH or EDMA_x_IRQRL to
be cleared. Setting bit 1 (CINT[0]) provides a global clear function, forcing the entire contents of the
EDMA_A_IRQRH or EDMA_x_IRQRL to be zeroed, disabling all eDMA interrupt requests. Reads of
this register return all zeroes.
If bit 0 is set, the CINT command is ignored. This allows multiple byte registers to be written as a 32-bit
word. Reads of this register return all zeroes.
Offset: EDMA_x_BASE + 0X001C
Access: User write-only
0
1
2
3
4
5
6
7
R0
0
0
0
0
0
0
0
W NOP
CINT[0:6]
Reset 0
0
0
0
0
0
0
0
Figure 21-13. eDMA Clear Interrupt Request (EDMA_x_CIRQR)
Table 21-12. EDMA_x_CIRQR Field Descriptions
Field
0
NOP
1–7
CINT
Description
No operation.
0 Normal operation.
1 No operation, ignore bits 1-7.
Clear Interrupt Request.
0–31 (63 for eDMA_A) Clear corresponding bit in EDMA_A_IRQRH or EDMA_x_IRQRL.
64–127 Clear all bits in EDMA_A_IRQRH or EDMA_x_IRQRL.
Bit 2 (CIRQR[1]) is not used on eDMA_B.
21.3.2.10 eDMA Clear Error Register (EDMA_x_CER)
The EDMA_x_CER provides a memory-mapped mechanism to clear a given bit in the EDMA_A_ERH
or EDMA_x_ERL to disable the error condition flag for a given channel. The given value on a register
write causes the corresponding bit in the EDMA_A_ERH or EDMA_x_ERL to be cleared. Setting bit 1
(CERR[0]) provides a global clear function, forcing the entire contents of the EDMA_A_ERH or
EDMA_x_ERL to be zeroed, clearing all channel error indicators. Reads of this register return all zeroes.
If bit 0 is set, the CERR command is ignored. This allows multiple byte registers to be written as a 32-bit
word. Reads of this register return all zeroes.
Freescale Semiconductor
PXR40 Microcontroller Reference Manual, Rev. 1
21-27