MC9S08LC36 FREESCALE [Freescale Semiconductor, Inc], MC9S08LC36 Datasheet - Page 150
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MC9S08LC36
Manufacturer Part Number
MC9S08LC36
Description
Microcontrollers
Manufacturer
FREESCALE [Freescale Semiconductor, Inc]
Datasheet
1.MC9S08LC36.pdf
(358 pages)
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Liquid Crystal Display Driver (S08LCDV1)
9.4.3.1
To configure all LCD segments to blink regardless of the contents of the LCDRAM bits while
LCDDRMS = 1, the BLKMODE bit in the LCDBCTL control register must to set to 1. To configure
individual LCD segments to blink, the BLKMODE bit in the LCDBCTL control register must be
deasserted.
If BLKMODE = 0, asserting the LCDRAM FP[n]BP[x] bits while LCDDRMS = 0 and LCDDRMS = 1
enables the LCD segment connected between FP[n] and BP[x] to blink when BLINK = 1. Each LCDRAM
register controls two frontplane drivers.
9.4.3.2
The LCD module waveform base clock is the basis for the calculation of the LCD module blink frequency.
The LCD module blink frequency is equal to the LCD module waveform base clock divided by the
BRATE[2:0] divider.
BRATE[2:0] and LCLK[2:0].
1 Shaded table entries are out of specification and are not valid
9.4.4
This section describes the LCD charge pump, voltage divider, and LCD power supply configuration
options.
The VSUPPLY[1:0] bit field in the LCDSUPPLY register is used to configure the LCD module power
supply source. VSUPPLY[1:0] indicates the state of internal signals used to configure power switches as
shown in the Table in
operational modes for the LCD module including configuration of the LCD module power supply source
using internal V
150
LCLK[2:0]
Figure 9-17
0
1
2
3
4
5
6
7
LCD Charge Pump, Voltage Divider, and Power Supply Operation
LCD Segment Blinking
Blink Frequency
DD
Frequency (Hz)
LCD Base
or an external supply.
provides a block diagram for the LCD charge pump and a V
2049.3
1024.7
Table 9-17
512.3
256.2
128.1
64.0
32.0
16.0
Figure
MC9S08LC60 Series Advance Information Data Sheet, Rev. 2
9-17. The block diagram in
Table 9-17. Blink Frequency Calculations
shows LCD module blink frequency calculations for all values of
(
Blink Rate = LCD Base (Hz) ÷ Blink Divider)
64.0
32.0
16.0
8.00
4.00
2.00
1.00
0.50
32
32.0
16.0
8.00
4.00
2.00
1.00
0.50
0.25
64
PRELIMINARY
16.0
8.00
4.00
2.00
1.00
0.50
0.25
0.13
128
Blink Divider = 2
Figure 9-17
Blink Frequency
8.00
4.00
2.00
1.00
0.50
0.25
0.13
0.06
256
(5+ BRATE[2:0])
4.00
2.00
1.00
0.50
0.25
0.13
0.06
0.03
512
illustrates several potential
1024
2.00
1.00
0.50
0.25
0.13
0.06
0.03
0.02
LCD
Freescale Semiconductor
voltage divider.
2048
1.00
0.50
0.25
0.13
0.06
0.03
0.02
0.01
4096
0.50
0.25
0.13
0.06
0.03
0.02
0.01
0.00
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