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Semtech 2006
www.semtech.com
19-1
XE8802 Sensing Machine Data Acquisition MCU
with ZoomingADC and LCD driver
19.
LCD
Driver
19.1
FEATURES ......................................................................................................................................... 19-2
19.2
OVERVIEW......................................................................................................................................... 19-2
19.3
REGISTER MAP .................................................................................................................................. 19-3
19.4
BASIC LCD CAPABILITIES.................................................................................................................... 19-6
19.4.1
Direct Drive Mode ............................................................................................................................ 19-7
19.4.2
1:2 Multiplex scheme ....................................................................................................................... 19-9
19.4.3
1:3 Multiplex scheme ..................................................................................................................... 19-11
19.4.4
1:4 Multiplex scheme ..................................................................................................................... 19-13
19.5
ADVANCED LCD FEATURES .............................................................................................................. 19-15
19.5.1
Register usage .............................................................................................................................. 19-15
19.5.2
Sleep mode or blinking mode ........................................................................................................ 19-15
19.5.3
LCD frame frequency selection...................................................................................................... 19-16
19.5.4
Voltage generation......................................................................................................................... 19-17
19.6
PARALLEL I/O PORT CAPABILITIES...................................................................................................... 19-21
19.6.1
Parallel port function ...................................................................................................................... 19-21
19.6.2
parallel port voltage ....................................................................................................................... 19-22
19.7
PARTIAL
LCD DRIVER / PARTIAL PARALLEL I/O PORT............................................................................ 19-24
19.7.1
Single low impedance voltage for V3 of LCD and digital I/O .......................................................... 19-24
19.7.2
Different voltage for V3 of LCD and digital I/O ............................................................................... 19-26
19.8
SPECIFICATIONS .............................................................................................................................. 19-27
19.8.1
pad_lcd_io used in LCD mode....................................................................................................... 19-27
19.8.2
pad_lcd_io used in digital I/O mode ............................................................................................... 19-27
19.8.3
voltage reference ........................................................................................................................... 19-28
19.8.4
LCD multiplier/divider..................................................................................................................... 19-28
Not
Recommended
for
New
Designs