LCD Controller Registers
11-47
LCD Controller
Table 11–23. LCD Subpanel Register (LcdSubpanel)
Bit
Name
Value
Description
Reset
Value
31
SPEN
Subpanel enable
0
0
Function disabled
1
Subpanel function mode enabled
30
Reserved
0
29
HOLS
High or low signal
The field indicates the position of subpanel compared to the LPPT
value.
0
28–26
Reserved
0
25–16
LPPT
Line per panel threshold
This field defines the number of lines to be refreshed (1–1024).
(Program to value minus 1.)
0
15–0
DPD
Default pixel data
DPD defines the default value of the pixel data sent to the panel for
the lines until LPPT is reached or after passing the LPPT.
0
The ability to display only the first or last n lines of the panel and send a fixed
contents for the other lines is supported with the subpanel display register,
shown in Figure 11–19. For the other lines, there is no access to the frame
buffer because the value stored in default pixel data is used.