NXP Semiconductors MC9S08LG16, Reference Manual

Page: 195 / 373

Chapter 8 LCD Module (S08LCDLPV1)
MC9S08LG32 MCU Series, Rev. 5
Freescale Semiconductor 195
Figure 9-17. LCD Programmer’s Model Diagram
9.6.1 LCD Seven Segment Example Description
A description of the connection between the LCD module and a seven segment LCD character is illustrated
below to provide a basic example for a 1/3 duty cycle LCD implementation. The example uses three
backplane pins (LCD[3], LCD[4] and LCD[5] and 3 frontplane pins (LCD[0], LCD[1], and LCD[2]).
Frame Frequency
DUTY[2:0]
LCLK[2:0]
LCD[10:4]
LCD[3:0]
Blink Enabl e
BMODE
LCDBCTL
Power Options
HREFSEL
CPSEL
Low Power
LCDWAI
LCDSTP
LCD Frame
LCDIEN LCDIF
Initialization Options
LCDPENR[5:0]
LCD Segment Energize
ALT
Data Bus
LCD Segment Display and Blink Control
LCDWF
LCD Power Pins
0.1
μ
F
V
cap1 V
cap2
C
TYP
=
0.1
μ
F
V
LL3
V
LL2
V
LL1
LCD charge pump capacitance
NOTE: Configured
for power using
internal V
DD
LCD GLASS PANEL
LCD Pin Enable
LCDEN
Blink Rate & Mode
SOURCE
Alternate Clock Source
External Crystal = 32.768 kHz
Input Clock Source
Shown with 7-segment
LCD glass hardware
Frequency
LCDC0
BRATE[2:0]
LCDC0
LCDSUPPLY
LCDC1
LCDC0
Module Enable
BMODE
LCDBCTL
LCDWF
LCDBCTL
LCDC1 LCDS
Interrupt
Segment Alternate
Segment Energize
Display Energize
Blink Mode Select
Display Mode Select
and Command
PEN[44:0]
BPyLCDx
BPyLCDx
BLANK
BBYPASS
VSUPPLY[1:0]
Backplane Enable
LCDBPEN[5:0]
BPEN[44:0]
Backplane Assignment
LCDWF
LCDWFx
LCDRVC
RVEN
RVTRIM[3:0]