GR740-UM-DS, Nov 2017, Version 1.7 174 www.cobham.com/gaisler
GR740
Table 161. 0x24,0x44,0x64,0x84 - RTR.AMBADMAMAXLEN - AMBA port DMA RX maximum length
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 162. 0x28,0x48,0x68,0x88 - RTR.AMBADMATXDESC - AMBA port DMA transmit descriptor table address
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 163. 0x2C,0x4C,0x6C,0x8C - RTR.AMBADMARXDESC - AMBA port DMA receive descriptor table address
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. Not reset.
9: 3 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 8 and eventually wrap to zero
again. Reset value: 0.
2: 0 RESERVED
Table 164. 0x30,0x50,0x70,0x90 - RTR.AMBADMAADDR - AMBA port DMA address
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.
To Next Page
Loading...
Need help?
General
