xe8802 Semtech Corporation, xe8802 Datasheet - Page 146

• Manufacturer Part Number: xe8802
• Description: Data Acquisition Soc With 16+10 Bit Zoomingadc? Embedded Risc Controller And Lcd Driver
• Manufacturer: Semtech Corporation

19.1 Features
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19.2 Overview
The LCD driver generates all waveforms to drive the display. The user has only to set a 0 (segment off) or a 1
(segment on) in the bit location corresponding to the segment. The LCD driver supports the wave form generation
for different multiplexing schemes: direct drive (no multiplexing), multiplexing by 2, by 3 and by 4. The frame
frequency is software programmable. Low power on-chip voltage generation is provided for each of the different
multiplexing schemes. The LCD driver voltage is completely independent from the circuit supply voltage: the LCD
driver voltage can be below or above the circuit supply voltage. All or part of the driver can be configured as a
© Semtech 2006
Supports direct drive for 32 segments.
Supports multiplexed drive for up to 120 segments
Multiplex 1/2, 1/3 and 1/4.
Possibility to use pads as an input/output port or as LCD driver pin.
Multiple frame frequencies.
Sleep mode.
On chip low-power voltage generation.
LCD driver voltage is independent from the circuit supply voltage.
Parallel IO with voltage different from the circuit supply voltage.
L C D C O N T R O L
I/ O p o rt c o n t r o l
A N D M O D E
R E G IS T E R
C O N T R O L
R E G IS T E R
M E M O R Y
D IS P L AY
1 6 x 8 b it s
r e g is t e rs
V G E N
ts
G E N E R AT O R
G E N E R AT O R
W A V E F O R M
W A V E F O R M
S E G M E N T S
Figure 19-1: General Structure
I/ O P O R T
L C D P E R IP H
XE8802 Sensing Machine Data Acquisition MCU
C O M S
19-2
with ZoomingADC™ and LCD driver
V G E N P A D S
L C D P A D S
V 1
V 2
V 3
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