Motorola MC68VZ328 - Manual (Page 140)

8-12 MC68VZ328 User’s Manual
Programming Model
8.3.4 LCD Screen Height Register
The LCD screen height register (LYMAX) is used to define the height of the LCD panel’s screen in pixels.
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 8-5.
LYMAX LCD Screen Height Register 0x(FF)FFFA0A
8.3.5 LCD Cursor X Position Register
The LCD cursor X position (LCXP) register is used to determine the horizontal pixel position of the cursor
on the LCD panel. 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 8-6.
LCXP LCD Cursor X Position Register 0x(FF)FFFA18
BIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 BIT 0
YM8 YM7 YM6 YM5 YM4 YM3 YM2 YM1 YM0
TYPE rw rw rw rw rw rw rw rw rw
RESET
0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
0x01FF
Table 8-5. LCD Screen Height Register Description
Name Description Setting
Reserved
Bits 15–9 Reserved These bits are reserved and
should be set to 0.
YMx
Bits 8–0 Maximum Height 8–0—These bits represent the height of the
LCD panel in the number of pixels, which is equal to YMAX + 1. See description.
BIT 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 BIT 0
CC1 CC0
CX
P9
CX
P8
CX
P7
CX
P6
CX
P5
CX
P4
CX
P3
CX
P2
CX
P1
CXP0
TYPE rw rw rw rw rw rw rw rw rw rw rw rw
RESET
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0x0000
Table 8-6. LCD Cursor X Position Register Description
Name Description Setting
CCx
Bits 15–14 Cursor Control 1 and 0—These bits are used to control
the format of the cursor. 00 = Transparent, cursor is disabled.
01 = Full (black) cursor.
10 = Reversed video.
11 = Full (white) cursor.
Reserved
Bits 13–10 Reserved These bits are reserved and should
be set to 0.