XE8802 Datasheet, PDF (145/193 Pages) Semtech Corporation – Sensing Machine Data Acquisition MCU

XE8802 Sensing Machine Data Acquisition MCU
with ZoomingADC™ and LCD driver
19. LCD Driver
19.1
19.2
19.3
19.4
19.4.1
19.4.2
19.4.3
19.4.4
19.5
19.5.1
19.5.2
19.5.3
19.5.4
19.6
19.6.1
19.6.2
19.7
19.7.1
19.7.2
19.8
19.8.1
19.8.2
19.8.3
19.8.4
FEATURES ......................................................................................................................................... 19-2
OVERVIEW......................................................................................................................................... 19-2
REGISTER MAP .................................................................................................................................. 19-3
BASIC LCD CAPABILITIES.................................................................................................................... 19-6
Direct Drive Mode ............................................................................................................................ 19-7
1:2 Multiplex scheme ....................................................................................................................... 19-9
1:3 Multiplex scheme ..................................................................................................................... 19-11
1:4 Multiplex scheme ..................................................................................................................... 19-13
ADVANCED LCD FEATURES .............................................................................................................. 19-15
Register usage .............................................................................................................................. 19-15
Sleep mode or blinking mode ........................................................................................................ 19-15
LCD frame frequency selection...................................................................................................... 19-16
Voltage generation......................................................................................................................... 19-17
PARALLEL I/O PORT CAPABILITIES...................................................................................................... 19-21
Parallel port function ...................................................................................................................... 19-21
parallel port voltage ....................................................................................................................... 19-22
PARTIAL LCD DRIVER / PARTIAL PARALLEL I/O PORT............................................................................ 19-24
Single low impedance voltage for V3 of LCD and digital I/O .......................................................... 19-24
Different voltage for V3 of LCD and digital I/O ............................................................................... 19-26
SPECIFICATIONS .............................................................................................................................. 19-27
pad_lcd_io used in LCD mode....................................................................................................... 19-27
pad_lcd_io used in digital I/O mode ............................................................................................... 19-27
voltage reference ........................................................................................................................... 19-28
LCD multiplier/divider..................................................................................................................... 19-28
© Semtech 2006
19-1
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