COBHAM GR740 User Manual

GR740-UM-DS, Nov 2017, Version 1.7 236 www.cobham.com/gaisler
GR740
15.10.3
Table 274.0x08 - BCIM - PCI master prefetch burst limit
PCI master prefetch burst limit register
15.10.4
Table 275.0x0C - AHB2PCI - AHB to PCI mapping for PCI IO
AHB to PCI mapping for PCI IO register
15.10.5
Table 276.0x10 - DMACTRL - DMA control and status register
DMA control and status register
31 16 15 8 7 0
AHB master unmask RESERVED Burst length
0 0 0xFF
rw r r
31: 16 AHB master unmask - When bit[n] is set, the prefetch burst of AHB master n is limited by the “Burst
length” field.
15: 8 RESERVED
7: 0 Burst length - Maximum number of beats - 1 in the burst. (Maximin value is 0xFF => 0x100 beats
=> 1kB address)
31 16 15 0
AHB to PCI IO RESERVED
00
rw r
31: 16 AHB to PCI IO - Used as the MSBs of the base address for a PCI IO access.
15: 0 RESERVED
31 31 20 19 12 11 10 9 8 7 6 4 3 2 1 0
SA
FE
RESERVED CHIRQ MA TA PE AE DE NUMCH AC
TIV
E
DIS IE EN
1
0 0 0000
0
00000
rw r wc wc wc wc wc wc rw r rw rw rw
31 : Safety guard (SAFE) - Needs to be set to ‘1’ for the control fields to be updated
30: 20 RESERVED
19: 12 Channel IRQ status (CHIRQ) - Set to ‘1’ when a descriptor is configured to signal interrupt. bit[0]
corresponds to the channel with ID 0, bit[1] corresponds to the channel with ID 1, ... Clear by writing
‘1’
11 Master abort (MA) - received master abort during PCI access. Clear by writing ‘1’
10 : Target abort (TA) - received target abort during PCI access. Clear by writing ‘1’
9 Parity error (PE) - parity error during PCI access. Clear by writing ‘1’
8 : AHB data error (AE) - Error during AHB data access. Clear by writing ‘1’
7 : AHB descriptor error (DE) - Error during descriptor access. Clear by writing ‘1’
6: 4 Number of DMA channels (NUMCH) - Guarded by bit 31, safety guard
3 DMA active (ACTIVE)
2 : DMA disable/stop (DIS) - Writing ‘1’ to this bit disables the DMA.
1 Interrupt enable (IE) - (Guarded by bit[31], safety guard).
0 : DMA enable/start (EN) - Writing ‘1’ to this bit enables the DMA

COBHAM GR740 Specifications

General

Brand	COBHAM
Model	GR740
Category	Computer Hardware
Language	English