GPMC
7.1.5.21 GPMC_PREFETCH_CONFIG1
Figure 7-71. GPMC_PREFETCH_CONFIG1
31
30
28
27
26
24
Reserved
CYCLEOPTIMIZATION
ENABLEOPTIMIZED
ENGINECSSELECTOR
ACCESS
R-0
R/W-0
R/W-0
R/W-0
23
22
20
19
16
PFPWENROUNDROBIN
Reserved
PFPWWEIGHTEDPRIO
R/W-0
R-0
R/W-0
15
14
8
Reserved
FIFOTHRESHOLD
R-0
R/W-0
7
6
5
4
3
2
1
0
ENABLEENGINE
Reserved
WAITPINSELECTOR
SYNCHROMODE
DMAMODE
Reserved
ACCESSMODE
R/W-0
R-0
R/W-0
R/W-0
R/W-0
R-0
R/W-0
LEGEND: R = Read only; -n = value after reset
Table 7-75. GPMC_PREFETCH_CONFIG1 Field Descriptions
Bit
Field
Value
Description
31
Reserved
0
Reserved
30-28
CYCLEOPTIMIZATION
Define the number of GPMC.FCLK cycles to be substracted from RdCycleTime,
WrCycleTime, AccessTime, CSRdOffTime, CSWrOffTime, ADVRdOffTime,
ADVWrOffTime, OEOffTime, WEOffTime
0
0 GPMC_FCLK cycle
1h
1 GPMC_FCLK cycle
⋮
⋮
7h
7 GPMC_FCLK cycles
27
ENABLEOPTIMIZEDACCESS
Enables access cycle optimization
0
Access cycle optimization is disabled
1
Access cycle optimization is enabled
26-24
ENGINECSSELECTOR
Selects the CS where Prefetch Postwrite engine is active
0
CS0
1h
CS1
2h
CS2
3h
CS3
4h
CS4
5h
CS5
6h
CS6
7h
CS7
23
PFPWENROUNDROBIN
Enables the PFPW RoundRobin arbitration
0
Prefetch Postwrite engine round robin arbitration is disabled
1
Prefetch Postwrite engine round robin arbitration is enabled
22-20
Reserved
0
Reserved
19-16
PFPWWEIGHTEDPRIO
When an arbitration occurs between a direct memory access and a PFPW engine
access, the direct memory access is always serviced. If the PFPWEnRoundRobin
is enabled,
0
The next access is granted to the PFPW engine
1h
The two next accesses are granted to the PFPW engine
⋮
⋮
Fh
The 16 next accesses are granted to the PFPW engine
15
Reserved
0
Reserved
386
Memory Subsystem
SPRUH73H – October 2011 – Revised April 2013
Copyright © 2011–2013, Texas Instruments Incorporated