XE8000EV110 Semtech, XE8000EV110 Datasheet - Page 170

EVAL BOARD FOR XE8802AMI035LF

XE8000EV110

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

Specifications of XE8000EV110

Contents
Fully Assembled Evaluation Board
For Use With/related Products
XE88LC02MI035
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
19.7.2
When configured as a digital I/O, the logical ‘1’ on the pins pad_lcd_io[31:0] is identical to V3. For a part of the
pad_lcd_io[31:0] pins, the V3 connection is not made inside the circuit but has to be done externally by connecting
the pins pad_vgen_v3, pad_lcd_vr1 and pad_lcd_vr2 together. This feature allows for the use of different voltages
on V3 for the LCD display and for I/O parallel pins. Table 19-28 shows the partitioning of the pins. The voltages that
can be applied on pad_vgen_v3, pad_lcd_vr1, pad_lcd_vr2 and VBAT are completely independent from each
other.
© Semtech 2006
Different Voltages for V3 of LCD and Digital I/O
Figure 19-21. Sharing LCD driver (1:4 mux) and digital I/O with V3 ≠ logic ‘1’
VGEN
1.2V voltage
reference
Table 19-28. V3 connection of the different pad_lcd_io pins
pad_lcd_com0
pad_lcd_com1
pad_lcd_io[31:12]
pad_lcd_io[11:4]
pad_lcd_io[3:0]
pad_lcd_io[29:12]
pad_lcd_io[30]
pad_lcd_io[31]
pad_lcd_com1
pad_lcd_com0
pad_lcd_io[11:4]
pad_vgen_vb
pad_vgen_v3
pad_vgen_v2
pad_vgen_v1
pad_vgen_va
pad_lcd_io[3:0]
pad_lcd_vr2
pad_lcd_vr1
vdd1 voltage domain
vdd2 voltage domain
vbat
vss
XE8802 Sensing Machine Data Acquisition MCU
pin
SEGMENTS[17:0]
C
lcd1
COM3
COM2
COM1
COM0
19-26
C
vbat
vdd1
vdd2
lcd2
V3 connection
pad_vgen_v3
pad_lcd_vr1
pad_lcd_vr2
C
with ZoomingADC™ and LCD driver
lcd3
vdd
io[3:0]
vdd
io[7:0]
C
aux
LCD DISPLAY
EXTERNAL
CIRCUIT
EXTERNAL
CIRCUIT
vss
vss
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