NXP Semiconductors MKW01Z128, Reference Manual

Page: 453 / 884

DMA_SARn field descriptions
Field Description
SAR SAR
Each SAR contains the byte address used by the DMA controller to read data. The SARn is typically
aligned on a 0-modulo-ssize boundary—that is, on the natural alignment of the source data.
Restriction: Bits 31-20 of this register must be written with one of only several allowed values. Each of
these allowed values corresponds to a valid region of the device's memory map. The
allowed values are:
• 0x000x_xxxx
• 0x1FFx_xxxx
• 0x200x_xxxx
• 0x400x_xxxx
After being written with one of the allowed values, bits 31-20 read back as the written value.
After being written with any other value, bits 31-20 read back as an indeterminate value.
19.3.2 Destination Address Register (DMA_DARn)
Restriction
For this register:
• Only 32-bit writes are allowed. 16-bit and 8-bit writes
result in a bus error.
• Only several values are allowed to be written to bits 31-20
of this register, see the value list in the field description. A
write of any other value to these bits causes a configuration
error when the channel starts to execute. For more
information about the configuration error, see the
description of the
CE field of DSR.
Address: 4000_8000h base + 104h (16d × i), where i=0d to 3d
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
DAR
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
DMA_DARn field descriptions
Field Description
DAR DAR
Each DAR contains the byte address used by the DMA controller to write data. The DARn is typically
aligned on a 0-modulo-dsize boundary—that is, on the natural alignment of the destination data.
Restriction: Bits 31-20 of this register must be written with one of only several allowed values. Each of
these allowed values corresponds to a valid region of the device's memory map. The
allowed values are:
Memory Map/Register Definition
MKW01Z128 MCU Reference Manual, Rev. 3, 04/2016
322 Freescale Semiconductor, Inc.