Datasheet

06 February 2012 Broadcom Europe Ltd. 406 Science Park Milton Road Cambridge CB4 0WW Page 53
© 2012 Broadcom Corporation. All rights reserved
Synopsis
DMA Source Address
Bit(s)
Field Name
Description
Type
Reset
31:0
S_ADDR
DMA Source Address
Source address for the DMA operation. Updated by
the DMA engine as the transfer progresses.
RW
0x0
0_DEST_AD 1_DEST_AD 2_DEST_AD 3_DEST_AD 4_DEST_AD 5_DEST_AD 6_DEST_AD
7_DEST_AD 8_DEST_AD 9_DEST_AD 10_DEST_AD 11_DEST_AD 12_DEST_AD 13_DEST_AD
14_DEST_AD Register
Synopsis
DMA Destination Address
Bit(s)
Field Name
Description
Type
Reset
31:0
D_ADDR
DMA Destination Address
Destination address for the DMA operation. Updated
by the DMA engine as the transfer progresses.
RW
0x0
0_TXFR_LEN 1_TXFR_LEN 2_TXFR_LEN 3_TXFR_LEN 4_TXFR_LEN 5_TXFR_LEN 6_TXFR_LEN
Register
Synopsis
DMA Transfer Length. This specifies the amount of data to be transferred in bytes.
In normal (non 2D) mode this specifies the amount of bytes to be transferred.
In 2D mode it is interpreted as an X and a Y length, and the DMA will perform Y transfers, each
of length X bytes and add the strides onto the addresses after each X leg of the transfer.
The length register is updated by the DMA engine as the transfer progresses, so it will indicate
the data left to transfer.
Bit(s)
Field Name
Description
Type
Reset
31:30
Reserved
-
Write as 0, read as don't care
29:16
YLENGTH
When in 2D mode, This is the Y transfer length,
indicating how many xlength transfers are performed.
When in normal linear mode this becomes the top bits
of the XLENGTH
RW
0x0
15:0
XLENGTH
Transfer Length in bytes.
RW
0x0