Screen Start Address Register; Size Register; Table 19-9 Screen Start Address Register Description - Motorola DragonBall MC9328MX1 Reference Manual

LCD Controller

19.4.1 Screen Start Address Register

The Screen Start Address Register specifies the start address of the LCD screen. See Figure 19-2.
SSA
BIT 31 30 29
TYPE rw rw rw
0 0 0
RESET
BIT 15 14 13
TYPE rw rw rw
0 0 0
RESET
Table 19-9. Screen Start Address Register Description
Name
SSA Screen Start Address of LCD Panel—Holds pixel data for a new frame from the SSA address. This
Bits 31–2 field must start at a location that enables a complete picture to be stored in a 4 Mbyte memory
boundary (A [21:0]). A [31:22] has a fixed value for a picture's image.
Reserved Reserved—These bits are reserved and should read 0.
Bits 1–0

19.4.2 Size Register

The Size Register defines the height and width of the LCD screen.
SIZE
BIT 31 30 29
TYPE r r r
0 0 0
RESET
BIT 15 14 13
TYPE r r r
0 0 0
RESET
19-20
Screen Start Address Register
28 27 26 25
rw rw rw rw
0 0 0 0
12 11 10 9
SSA
rw rw rw rw
0 0 0 0
Size Register
28 27 26 25
r r r rw
0 0 0 0
12 11 10 9
r r r r
0 0 0 0
MC9328MX1 Reference Manual
24 23 22 21 20
SSA
rw rw rw rw rw
0 0 0 0
0x0000
8 7 6 5
rw rw rw rw rw
0 0 0 0
0x0000
Description
24 23 22 21 20
XMAX
rw rw rw rw rw
0 0 0 0
0x0000
8 7 6 5
YMAX
rw rw rw rw rw
0 0 0 0
0x0000
Addr
0x00205000
19 18 17
rw rw rw
0 0 0 0
4 3 2 1
rw rw r
0 0 0 0
Addr
0x00205004
19 18 17
r r r
0 0 0 0
4 3 2 1
rw rw rw
0 0 0 0
MOTOROLA
16
rw
0
0
r
0
16
r
0
0
rw
0