XE8000EV110 Semtech, XE8000EV110 Datasheet - Page 151

• Manufacturer Part Number: XE8000EV110
• Description: EVAL BOARD FOR XE8802AMI035LF
• Manufacturer: Semtech
• Type: MCUr

Specifications of XE8000EV110

• Contents: Fully Assembled Evaluation Board
• For Use With/related Products: XE88LC02MI035
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

19.4.1
With direct drive mode, each pad_lcd_io pin drives one segment of the display. In this mode, up to 32 segments of
the display can be connected directly to the pad_lcd_io[31:0] pins. The common (or backplane) node is to be
connected to pad_lcd_com[0]. This connection is shown in Figure 19-2.
Lots of different configurations for the voltage generation can be used. Figure 19-2 shows the connections and
external elements that are required if the display is to be driven from V3=3.6V independently from the circuit supply
voltage. Other possible configurations are given in section 19.5.4. The recommended value for the external
elements is 470nF (see also section 19.5.4.1).
To operate the driver in this configuration, the registers should be loaded with the values in Table 19-13.
© Semtech 2006
Direct Drive Mode
VGEN
1.2V voltage
reference
19-2: LCD with direct drive and on-chip voltage generation.
pad_lcd_io[31:0]
pad_lcd_com1
pad_lcd_com0
pad_vgen_v3
pad_vgen_v2
pad_vgen_v1
pad_vgen_va
pad_vgen_vb
pad_lcd_vr1
pad_lcd_vr2
Table 19-13. Register contents for direct drive example
RegVgenCfg0
RegLcdOn
RegLcdSe
RegLcdClkFrame
Register
XE8802 Sensing Machine Data Acquisition MCU
C
SEGMENTS
lcd1
COM0
C
lcd2
19-7
C
lcd3
Contents[7:0]
xx110001
xxxxx000
11111111
100xxx00
with ZoomingADC™ and LCD driver
C
aux
LCD DISPLAY
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Figure