68HC05CL48 Datasheet, PDF (103/145 Pages) Motorola, Inc – SPECIFICATION (General Release)

June 11, 1997 GENERAL RELEASE SPECIFICATION
12.3 LCD VOLTAGE GENERATION
Figure 12-4 shows the resistive divider chain network that is used to produce the
various LCD waveforms outlined in the previous section. The LCD system can be
disabled by setting the DISON bit to 0. The voltage levels of the LCD driver
waveforms and hence the contrast of the LCD can be altered by selecting
appropriate resistors by setting the corresponding values to the CC0 to CC3 bits
in the LCDCTR register.
VLCD
DISON
BIAS5
V5
RL5
V4
External Caps
RL4
V3
RL3
V2
RL2
V1
RL1
V0
CC3
CC2
RC3
RC2
CC1
CC0
RC1
RC0
MC68HC05CL48
REV 2.0
Figure 12-4. Voltage Generator
LCD DRIVER
MOTOROLA
12-7