FCLK
WrCycleTime = 6
nADV
nCS
nWE
A/D bus
CsWriteOffTime = 6
WeOffTime = 5
DATA
DATA
At least > 25 ns (tWP)
WeOnTime = 2 (at least 1)
AdvWrOffTime = 1
Access Completion / Data Hold time
At least > 20 ns (tWPH)
ADDRESS
ADDRESS
Preliminary
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Table 5-51. GPMC Timing Parameters for Asynchronous Single Write
Number of
Duration
Parameter Name on
Clock Cycles
(ns)
GPMC side
Formula
(F = 104 MHz)
GPMC Register Configurations
ClkActivationTime
n/a (asynchronous mode)
Applicable only to
AccessTime
WAITMONITORING (the value is
the same as for read access)
PageBurstAccessTime
n/a (single access)
WrCycleTime
WeO AccessCompletion
57, 615
6
WRCYCLETIME = 6h
CsOnTime
tCAS
0
0
CSONTIME = 0
CsWrOffTime
WeO 1
57, 615
6
CSWROFFTIME = 6h
AdvOnTime
tAVSC
3
1
ADVONTIME = 1
AdvWrOffTime
tAVSC + tAVDP
9
1
ADVWROFFTIME = 1
WeOnTime
tCS
3
1
WEONTIME = 1
WeOffTime
tCS + tWP + tWPH
48
5
WEOFFTIME = 5h
Figure 5-50. Asynchronous Single Write Access (Timing Parameters in Clock Cycles)
658
General-Purpose Memory Controller (GPMC)
SPRUGX9 – 15 April 2011
© 2011, Texas Instruments Incorporated