8-18 MC68VZ328 User’s Manual
Programming Model
8.3.13 LCD Clocking Control Register

The LCD clocking control (LCKCON) register is used to enable the LCD controller and control the LCD

memory cycle. The bit assignments for the register are shown in the following register display. The

settings for the bits in the register are listed in Table8-14.

LCKCON LCD Clocking Control Register 0x(FF)FFFA27

8.3.14 LCD Refresh Rate Adjustment Register

The LCD refresh rate adjustment (LRRA) register is used to fine-tune the display refresh rate by

introducing an idle interval between alternate LCD DMA and display cycles. 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 8-15.

LRRA LCD Refresh Rate Adjustment Register 0x(FF)FFFA28

BIT 7654321BIT 0
LCDON Unused
TYPE rw rw rw rw rw rw rw rw
RESET 00000000
0x00
Table 8-14. LCD Clocking Control Register Description
Name Description Setting
LCDON
Bit 7 LCD Control—This bit enables the LCD controller. Default is
off. 0 = Disable the LCD controller
1 = Enable the LCD controller
Unused
Bits 6–0 These bits are not used by the chip and may be used for tem-
porary storage. At reset these bits are cleared. See description
BIT 1514 13 12 11 10987654321BIT 0
RRA[9:0]
TYPE rw rw rw rw rw rw rw rw rw rw
RESET 0 000000011111111
0x00FF
Table 8-15. LCD Refresh Rate Adjustment Register Description
Name Description Setting
Reserved
Bits 15–10 Reserved These bits
are reserved
and should
be set to 0.