COBHAM GR712RC - Page 218

GR712RC-UM, Jun 2017, Version 2.9 218 www.cobham.com/gaisler
GR712RC
Table 228. GRTM DMA length register
31 27 26 16 15 11 10 0
RESERVED LIMIT-1 RESERVED LENGTH-1
31: 27 RESERVED
26: 16 Transfer Limit (LIMIT)- length-1 of data to be fetched by DMA before transfer starts.
Note: LIMIT must be equal to or less than LENGTH.
LIMIT must be equal to or less than 128.
LIMIT must be equal to or larger than 64 for LENGTH > 64
15: 11 RESERVED
10: 0 Transfer Length (LENGTH) - length-1 of data to be transferred by DMA
Table 229. GRTM DMA descriptor pointer register
31 10 9 3 2 0
BASE INDEX “000”
31: 10 Descriptor base (BASE) - base address of descriptor table
9: 3 Descriptor index (INDEX) - index of active descriptor in descriptor table
2: 0 Reserved - fixed to “00”
Table 230. GRTM DMA configuration register (read-only)
31 16 15 0
FIFOSZ BLOCKSZ
31: 16 FIFO size (FIFOSZ) - size of FIFO memory in number of bytes (read-only), 128 bytes
15: 0 Block size (BLOCKSZ) - size of block in number of bytes (read-only), 32 bytes
Table 231. GRTM DMA revision register (read-only)
31 17 16 15 8 7 0
RESERVED TIRQ REVISION SUB REVISION
31: 17 RESERVED
16 Time Strobe Interrupt (TIRQ) - Separate time strobe interrupt supported, set to 1
15: 8 REVISION - Main revision number
0x00: Initial release
7: 0 SUB REVISION - Sub revision number
0x00: Initial release
0x01: Added time interrupt, moved TXRDY bit, added TXSTAT bit, added this revision register
Table 232. GRTM control register
31 10
RESERVED TE
31: 1 RESERVED
0: Transmitter Enable (TE) - enables telemetry transmitter (should be done after the complete configu-
ration of the telemetry transmitter, including the LENGTH field in the GRTM DMA length register)
Table 233. GRTM configuration register (read-only)
31 21 20 19 18 17 16 15 14 13 12 11 10 9 8 6 5 4 3 2 1 0
RESERVED
A
O
S
F
H
E
C
-M
C
G
-I
D
L
E
E
V
C
O
C
F
F
E
C
F
A
A
S
M
RS RS
DEPTH
-P
S
R
N
R
Z
CE SP SC
31: 21 RESERVED