Option
Video Input settings
Video Output settings
high active
(CSYNC)
VInCONTROL.SYNCSEL[1:0] = 10
B
VInCONTROL.SYNCINV = 0
•
VOnLCDTIMING2.IHS = 0
VOnLCDTIMING2.IVS = 0
or
•
VOnLCDTIMING2.IHS = 1
VOnLCDTIMING2.IVS = 1
low active
(CSYNC)
VInCONTROL.SYNCSEL[1:0] = 10
B
VInCONTROL.SYNCINV = 0
•
VOnLCDTIMING2.IHS = 0
VOnLCDTIMING2.IVS = 1
or
•
VOnLCDTIMING2.IHS = 1
VOnLCDTIMING2.IVS = 0
a
This mode outputs 16 bpp iRGB(1555) data, that can be captured by the Video Input in RGB(666) mode,
but no scaling should be applied.
4.5.4 Video Output control
The register SYSVOCTRL holds several bits to control some functions of the Video
Output module.
VOnVSYNC function
The function of the VOnVSYNC signal can be selected:
•
SYSVOCTRL.VOnVSSEL = 0: VOnVSYNC outputs vertical sync
signal VOnVSYNC
•
SYSVOCTRL.VOnVSSEL = 1: VOnVSYNC outputs video data enable
signal VOnEN
After release of RESET SYSVOCTRL.VOnVSSEL is set to "0", thus VOnVSYNC
outputs the vertical sync signal VOnVSYNC.
Sync mode
The generation of Video Output synchronization signals can be selected:
•
SYSVOCTRL.CSYNCSELn = 0: separate sync signals VOnVSYNC/
VOnHSYNC
•
SYSVOCTRL.CSYNCSELn = 1: composite sync signal VOnCSYNC
output instead of VOnHSYNC pin
After release of RESET SYSVOCTRL.CSYNCSELn is set to "0", thus separate
sync signals VOnVSYNC/VOnHSYNC are generated.
CLUT RAM enable
The colour look-up table palette RAM can be en- or disabled:
•
SYSVOCTRL.VOnRAMEN = 0: CLUT RAM disabled
•
SYSVOCTRL.VOnRAMEN = 1: CLUT RAM enabled
After release of RESET SYSVOCTRL.VOnRAMEN is set to "0", thus the CLUT
RAM is disabled.
Bus lock enable
The Video Output module's AHB master interfaces have the second highest
priority to use the AHB for fetching data from the framebuffer to refill its internal
FIFO. Only the Host CPU interface has higher priority.
In order to prevent consecutive Video Output burst framebuffer reads from being
interrupted by Host CPU memory accesses, the Video Output module can be
enabled to lock the bus between maximum two read burst. This way the memory
bandwidth granted to the Video Output modules is increased.
System Controller
Chapter 4
Preliminary User's Manual S19203EE1V3UM00
97
Содержание uPD72257
Страница 39: ...Pin Functions Chapter 2 Preliminary User s Manual S19203EE1V3UM00 39...
Страница 44: ...Chapter 2 Pin Functions 44 Preliminary User s Manual S19203EE1V3UM00...
Страница 46: ...Chapter 2 Pin Functions 46 Preliminary User s Manual S19203EE1V3UM00...
Страница 49: ...Pin Functions Chapter 2 Preliminary User s Manual S19203EE1V3UM00 49...
Страница 52: ...Chapter 2 Pin Functions 52 Preliminary User s Manual S19203EE1V3UM00...
Страница 54: ...Chapter 2 Pin Functions 54 Preliminary User s Manual S19203EE1V3UM00...
Страница 331: ...External Memory Interface Controller Chapter 9 Preliminary User s Manual S19203EE1V3UM00 331...
Страница 343: ......