GR740-UM-DS, Nov 2017, Version 1.7 428 www.cobham.com/gaisler
GR740
Table 560. 0x24 - SPW2.DMAMAXLEN - DMA RX maximum length, channel 1
31 25 24 210
RESERVED RXMAXLEN RES
0x00 N/R 0x0
rrwr
31: 25 RESERVED
24: 2 RX maximum length (RXMAXLEN) - Receiver packet maximum length in 32-bit words.
1: 0 RESERVED
Table 561. 0x28 - SPW2.DMATXDESC - DMA transmitter descriptor table address, channel 1
31 10 9 4 3 0
DESCBASEADDR DESCSEL RESERVED
N/R 0x00 0x0
rw rw r
31: 10 Descriptor table base address (DESCBASEADDR) - Sets the base address of the descriptor table
9: 4 Descriptor selector (DESCSEL) - Offset into the descriptor table. Shows which descriptor is currently used
by the GRSPW. For each new descriptor read, the selector will increase with 16 and eventually wrap to zero
again.
3: 0 RESERVED
Table 562. 0x2C - SPW2.DMARXDESC - DMA receiver descriptor table address, channel 1
31 10 9 3 2 0
DESCBASEADDR DESCSEL RESERVED
N/R 0x00 0x0
rw rw r
31: 10 Descriptor table base address (DESCBASEADDR) - Sets the base address of the descriptor table.
9: 3 Descriptor selector (DESCSEL) - Offset into the descriptor table. Shows which descriptor is currently used.
For each new descriptor read, the selector will increase with 8 and eventually wrap to zero again.
2: 0 RESERVED
Table 563. 0x30 - SPW2.DMAADDR - DMA address, channel 1
31 16 15 8 7 0
RESERVED MASK ADDR
0x0000 N/R N/R
rrwrw
31: 8 RESERVED
15: 8 Mask (MASK) - Mask used for node identification on the SpaceWire network. This field is used for masking
the address before comparison. Both the received address and the ADDR field are anded with the inverse of
MASK before the address check.
7: 0 Address (ADDR) - Address used for node identification on the SpaceWire network for the corresponding
dma channel when the EN bit in the DMA control register is set.
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