COBHAM GR740 User Manual

GR740-UM-DS, Nov 2017, Version 1.7 171 www.cobham.com/gaisler
GR740
Table 156. 0x04 - RTR.AMBASTS - AMBA port Status
31 30 28 27 26 25 24 23 13 12 11 9 8 7 0
R NIRQ NRXD NTXD RESERVED ME RESERVED EE IA RESERVED TO
0 0x6 0 0 0x000 0 0x0 0 0 0x00 0
rr rr r wcrwcwc r wc
31 RESERVED
30: 28 Number of interrupts (NIRQ) - Shows the number of support distributed interrupt, according to the formula
2
NIRQ
. Constant value of 0x6 = 64 supported interrupts.
27: 26 Number of receive descriptors (NRXD) - Shows the size of the DMA receive descriptor table. Constant value of
0, indicating 128 descriptors.
25: 24 Number of transmit descriptors (NTXD) - Shows the size of the DMA transmit descriptor table. Constant value
of 0, indicating 64 descriptors.
23: 13 RESERVED
12 Memory error packet truncation (ME) - This bit is set to one when a transmitted packet is truncated with an EEP
due to a memory error in the AMBA ports’ TX FIFO.
11: 9 RESERVED
8 Early EOP/EEP (EE) - Set to one when a packet is received with an EOP after the first byte for a non-RMAP
packet and after the second byte for an RMAP packet.
7 Invalid Address (IA) - Set to one when a packet is received with an invalid destination address field, i.e it does
not match the nodeaddr register.
6: 1 RESERVED
0 Tick Out (TO) - A new time count value was received and is stored in the time counter field.
Table 157. 0x08 - RTR.AMBADEFADDR - AMBA port Default address
31 16 15 8 7 0
RESERVED DEFMASK DEFADDR
0x0000 0x00 0xFE
rrwrw
31: 8 RESERVED
15: 8 Default mask (DEFMASK) - Default 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 DEFADDR field are anded
with the inverse of DEFMASK before the address check.
7: 0 Default address (DEFADDR) - Default address used for node identification on the SpaceWire network. Reset
value: 254.
Table 158. 0x10 - RTR.AMBADKEY - AMBA port Destination key
31 87 0
RESERVED DESTKEY
NA 0x00
rrw
31: 8 RESERVED
7: 0 Destination key (DESTKEY) - RMAP destination key.

COBHAM GR740 Specifications

General

Brand	COBHAM
Model	GR740
Category	Computer Hardware
Language	English