DSS_IRQST
A
TUS
DISPC_IRQ
Display controller
Display subsystem
DSI protocol engine
FRAMEDONE_EN
WAKEUP_EN
WAKEUP
.......
DISPC_IRQST
A
TUS
.......
DSI_IRQST
A
TUS
DSI_IRQ
DSS_IRQ
FRAMEDONE
dss-161
Public Version
Display Subsystem Integration
www.ti.com
details the interrupt tree for the DISPC and the display subsystem.
Figure 7-66. DISPC and DSS Interrupts Tree
7.3.2.2.1 DISPC Interrupt Request
The interrupt line indicates when one or more events are detected by the hardware. Each event is
independently maskable by setting the DSS.
register.
To check when a particular interrupt event occurs and to reset a particular event, the
DSS.
register must be accessed. This register regroups all the status of the module
internal events that generate an interrupt (read 0: No interrupt occurred; read 1: Interrupt occurred; write 1:
Status bit reset). See
, Display Subsystem Register Manual, for more information on checking
and clearing interrupt events.
lists the display subsystem interrupt events.
Table 7-22. Display Subsystem Interrupts
Interrupt Name
Description
FRAMEDONE
Active frame is complete and LCD output is disabled.
VSYNC
VSYNC interrupt occurred at the end of the frame.
EVSYNC_EVEN
(1)
EVSYNC_EVEN interrupt occurred at the end of the frame. (EVSYNC is received
and the field polarity is even.)
EVSYNC_ODD
(1)
EVSYNC_ODD interrupt occurred at the end of the frame. (EVSYNC is received
and the field polarity is odd.)
ACBIASCOUNTSTATUS
The ac-bias transition counter decremented to 0.
PROGRAMMEDLINENUMBER
The LCD reached the user-programmed line number.
GFXFIFOUNDERFLOW
The input graphics FIFO goes underflow.
GFXENDWINDOW
The screen reached the end of the graphics window. All data for the graphics
window are fetched from memory and displayed on the screen.
PALETTEGAMMALOADING
The palette/gamma table is loaded.
OCPERROR
L3 interconnect sent SResp = ERR.
VID1FIFOUNDERFLOW
The input video1 FIFO goes underflow.
(1)
EVYNC interrupts (EVSYNC_EVEN and EVSYNC_ODD) are external interrupts received by the display controller and generated
by the video encoder (VENC) module.
1630Display Subsystem
SWPU177N – December 2009 – Revised November 2010
Copyright © 2009–2010, Texas Instruments Incorporated