Datasheet

Chapter 9 Liquid Crystal Display Driver (S08LCDV1)
MC9S08LC60 Series Data Sheet: Technical Data, Rev. 4
128 Freescale Semiconductor
9.2.6 V
cap1
, V
cap2
The charge pump capacitor is used to transfer charge from the input supply to the regulated output. It is
recommended that a low equivalent series resistance (ESR) capacitor be used. Proper orientation is
imperative when using a polarized capacitor.
9.3 Register Definition
This section consists of register descriptions. Each description includes a standard register diagram.
Details of register bit and field function follow the register diagrams, in bit order.
9.3.1 LCD Control Register 0 (LCDCR0)
Read: anytime
Write: LCDEN anytime. To avoid segment flicker the clock prescaler bits (LCLK[2:0]) and the duty select
bits (DUTY[1:0]) must not be changed when the LCD module is enabled.
76543210
R
LCDEN LPWAVE LCLK2 LCLK1 LCLK0
0
DUTY1 DUTY0
W
Reset 01000011
= Unimplemented or Reserved
Figure 9-3. LCD Control Register 0 (LCDCR0)
Table 9-4. LCDCR0 Field Descriptions
Field Description
7
LCDEN
LCD Driver Enable — The LCDEN bit starts the LCD module waveform generator.
0 All frontplane and backplane pins are disabled. In addition, the LCD module system is disabled and all LCD
waveform generation clocks are stopped.
1 LCD module driver system is enabled. All frontplanes pins enabled using the frontplane enable register will
output an LCD module driver waveform.The backplane pins will output an LCD module driver waveform
based on the settings of DUTY0 and DUTY1.
6
LPWAVE
LCD Waveform — The LPWAVE bit allows selection of two types of LCD waveforms.
0 Normal waveforms selected.
1 Low-power waveforms selected.