NXP Semiconductors MC9S08LG16, Reference Manual

Page: 162 / 373

Chapter 8 LCD Module (S08LCDLPV1)
MC9S08LG32 MCU Series, Rev. 5
162 Freescale Semiconductor
Figure 9-2. LCD Driver Block Diagram
9.2 External Signal Description
The LCD module has several external pins dedicated to power supply and LCD frontplane/backplane
signaling. The LCD module can be configured to support eight backplane signals. The table below
itemizes all the LCD external pins. See the
Chapter 2, “Pins and Connections ,” for device-specific pin
configurations.
Table 9-2. Signal Properties
Name Port Function Reset State
45 LCD frontplane/backplane
LCD[44:0]
Switchable frontplane/backplane driver that connects directly
to the display
LCD[44:0] can operate as GPIO pins
High impedance
LCD bias voltages
V
LL1
,
V
LL2
,
V
LL3,
V
LL3_2
LCD bias voltages
—
LCD charge pump capacitance
V
cap1
, V
cap2
Charge pump capacitor pins
—
LCDIEN
V
LL1
V
LL2
V
LL3
/V
LL3_2
IP
BUS
Prescaler
Alternate Clock
OSCOUT = 32.768 kHz
SOURCE
LCDIF
Frame Rate Clock
LADJ
DUTY
BRATE
Backplane Sequencer
ALT
BLANK BLINK
BMODE
FP or BP data
LCD Waveform Registers
Write Buffer
LCD
BUS
LCDPEN
LCDBPEN
8 BP Phases
Sequenced
MUX
Charge Pump
V
DD
VSUPPLY
CPSEL RVEN
0.1
μ
F
V
cap1
V
cap2
LCD[x]
FP or BP
LCDCLK