Lcd Virtual Page Width Register; Lcd Screen Width Register; Table 8-3 Lcd Virtual Page Width Register Description; Table 8-4 Lcd Screen Width Register Description - Motorola MC68VZ328 User Manual

8.3.2

LCD Virtual Page Width Register

The LCD virtual page width (LVPW) register contains the width of the displayed image. The bit
assignments for the register are shown in the following register display. The settings for the bits in the
register are listed in Table 8-3.
LVPW
BIT 7
VP8
TYPE rw
1
RESET
Table 8-3. LCD Virtual Page Width Register Description
Name
VPx Virtual Page Width 8–1—These bits specify the virtual page width of the LCD panel
Bits 7–0 in terms of word count. The virtual page width is the virtual width in pixels divided by
16 for a black-and-white display, by 8 for a 4-grayscale display, and by 4 for a
16-grayscale display.
8.3.3

LCD Screen Width Register

The LCD screen width register (LXMAX) is used to specify the width of the LCD panel's screen in pixels.
This register must be a multiple of 16. The bit assignments for the register are shown in the following
register display. The settings for the bits in the register are listed in Table 8-4.
LXMAX
BIT 15 14
TYPE
0 0
RESET
Name
Reserved Reserved
Bits 15–10
XMx Maximum Width 9–4—These bits represent the width of the LCD
Bits 9–4 panel in the number of pixels.
Reserved Reserved
Bits 3–0
LCD Virtual Page Width Register
6 5
VP7 VP6
rw rw
1 1
Description
LCD Screen Width Register
13 12 11 10 9
XM9
rw
0 0 0 0 1
Table 8-4. LCD Screen Width Register Description
Description
LCD Controller
4 3
VP5 VP4 VP3
rw rw rw
1 1
0xFF
8 7 6 5
XM8 XM7 XM6 XM5
rw rw rw rw
1 1 1 1
0x03F0
Programming Model
0x(FF)FFFA05
2 1 BIT 0
VP2 VP1
rw rw
1 1 1
Setting
See descrip-
tion
0x(FF)FFFA08
4 3 2 1 BIT 0
XM4
rw
1 0 0 0
Setting
These bits are reserved and
should be set to 0.
See description.
These bits are reserved and
should be set to 0.
8-11
0