Gated mode
DSI_PLL_CONTROL[2]
DSI_PLL_HALTMODE
bit = 1? (*1)
Yes
DSIStopClk signal
asserted?
Yes
No
Clear CLKINEN = 0
Yes
CLKIN4DDR stops
PLL input stopped
Wait for PLL to relock
DSI protocol engine
idle
DSIStopClk signal
asserted?
No
DSI protocol engine
idle
PLL input started
Yes
HSDIVIDER used?
(*1)
No
DSIStopClk signal
asserted?
Yes
No
No
HSDIVIDER is used if
DSS_CONTROL[0] DISPC_CLK_SWITCH
DSS_CONTROL[1]
= 1
or
DSI_CLK_SWITCH = 1
Yes
CLKIN4DDR runs
DIS_PLL_GO(0)DSI_PLL_GO
bit set to 1 by software?
Yes
No
Lock asserted?
No
Clear REFEN bit to 0
Set REFEN to 1
Set CLKINEN bit to 1
dss-184
Public Version
Display Subsystem Basic Programming Model
www.ti.com
Figure 7-138. Gated Mode Sequence
NOTE: All thick-outlined blocks show operations performed by software.
7.5.5.5
DSI PLL Lock Sequence
The DSI PLL (ADPLLM) generates the CLKIN4DDR clock. The HSDIVIDER generates two clocks:
DSI1_PLL_FCLK connected to the display controller (DISPC) and the DSI2_PLL_FCLK connected to the
DSI protocol engine. If these two clocks are not used, the HSDIVIDER functions are not required.
The CLKIN4DDR is twice the data rate, and is four times the DSI output clock frequency. The DSI PLL
factors need to be calculated based on the required input and output frequencies, keeping the PLL internal
reference frequency in the appropriate range:
1754
Display Subsystem
SWPU177N – December 2009 – Revised November 2010
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 ...