Valid Address
D0
D1
D2
D3
OUT
IN
OUT
CSONTIME
ADVONTIME
ADVRDOFFTIME
OEONTIME
OEOFFTIME0
CLKACTIVATIONTIME
CSRDOFFTIME0
CSRDOFFTIME1
OEOFFTIME1
Wait de-asserted one
GPMC.CLK cycle
before valid data
Wait de-asserted
same cycle as
valid data
RDACCESSTIME
RDCYCLETIME0
PAGEBURSTACCESSTIME
PAGEBURSTACCESSTIME
PAGEBURSTACCESSTIME
RDCYCLETIME1
WaitMonitoringTime = 00
WaitMonitoringTime = 01
GPMC_FCLK
GPMC_CLK
gpmc_a[11:1]
gpmc_d[15:0]
nBE1/nBE0
nCS
nADV
nOE
DIR
WAIT
gpmc-009
Public Version
www.ti.com
General-Purpose Memory Controller
•
WAIT monitored as inactive unfreezes the CYCLETIME counter. For an access within a burst (when
the CYCLETIME counter is by definition in lock state), WAIT monitored as inactive completes the
current access time and starts the next access phase in the burst. The data bus is considered valid,
and data are captured during this clock cycle. In a single access or if this was the last access in a
multiple-access cycle, all signals are controlled according to their relative control timing value and the
CYCLETIME counter status.
shows wait behavior during a synchronous read burst access.
Figure 10-9. Wait Behavior During a Synchronous Read Burst Access
NOTE:
The WAIT signal is active low. WAITMONITORINGTIME = 00, 01.
10.1.5.4.4 Wait Monitoring During a Synchronous Write Access
During synchronous accesses with wait-pin monitoring enabled (the WAITWRITEMONITORING bit), the
wait pin is captured synchronously with GPMC_CLK, using the rising edge of this clock.
If enabled, external wait-pin monitoring can be used in combination with WRACCESSTIME to control the
effective memory device GPMC_CLK capture edge.
2137
SWPU177N – December 2009 – Revised November 2010
Memory Subsystem
Copyright © 2009–2010, Texas Instruments Incorporated
Содержание OMAP36 Series
Страница 174: ...174 List of Tables SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 692: ...692 MPU Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1084: ...1084 IVA2 2 Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 1990: ...1990 2D 3D Graphics Accelerator SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2334: ...2334 Memory Subsystem SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2700: ...2700 Memory Management Units SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2868: ...2868 HDQ 1 Wire SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 2974: ...2974 UART IrDA CIR SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3054: ...3054 Multichannel SPI SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3462: ...3462 MMC SD SDIO Card Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3508: ...3508 General Purpose Interface SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3584: ...3584 Initialization SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...
Страница 3648: ...3648 Debug and Emulation SWPU177N December 2009 Revised November 2010 Copyright 2009 2010 Texas Instruments Incorporated ...