xe8802 Semtech Corporation, xe8802 Datasheet - Page 158
xe8802
Manufacturer Part Number
xe8802
Description
Data Acquisition Soc With 16+10 Bit Zoomingadc? Embedded Risc Controller And Lcd Driver
Manufacturer
Semtech Corporation
Datasheet
1.XE8802.pdf
(193 pages)
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To operate the driver in this configuration, the registers should be loaded with the values in Table 19-16.
The voltage generator has to be configured for the use of the internal reference (VgenRefEn=1 in RegVgenCfg0).
The generator has to run (VgenOff=0 and VgenStdb=0 in RegVgenCfg0). It has to generate 1/3 bias
(VgenMode=0 in RegVgenCfg0) and the generator output impedance is set to minimum (VgenClkSel=11 in
RegVgenCfg0).
The LCD driver is set to 1:4 multiplexing (LcdMux=11 in RegLcdOn) and the waveform generator is enabled
(LcdSleep=0 in RegLcdOn). All pads are set into the LCD driver mode by setting all bits of register RegLcdSe to
© Semtech 2006
p a d _ lc d _ c o m 1
p a d _ lc d _ io [3 1 ]
p a d _ lc d _ io [3 0 ]
p a d _ lc d _ io [0 ]
p a d _ lc d _ io [1 ]
p a d _ lc d _ c o m 0
p a d _ lc d _ io [2 ]
V 3
V 2
V 1
V 0
V 3
V 2
V 1
V 0
V 3
V 2
V 1
V 0
V 3
V 2
V 1
V 0
V 3
V 2
V 1
V 0
V 3
V 2
V 1
V 0
V 3
V 2
V 1
V 0
F r a m e f r e q u e n c y
RegVgenCfg0
RegLcdOn
RegLcdSe
RegLcdClkFrame
Table 19-16. Register contents for 1:4 mux example
Figure 19-9. 1:4 MUX mode waveforms
Register
XE8802 Sensing Machine Data Acquisition MCU
19-14
Contents[7:0]
xx110001
xxxxx011
11111111
100xxx10
with ZoomingADC™ and LCD driver
- V 1
- V 2
- V 3
- V 1
- V 2
- V 3
- V 1
- V 2
- V 3
V 3
V 2
V 1
V 0
V 3
V 2
V 1
V 0
V 3
V 2
V 1
V 0
p a d _ lc d _ c o m 1 - p a d _ lc d _ io [ 1 ] (o f f)
p a d _ lc d _ io [3 0 ] - p a d _ lc d _ io [2 ] ( o n )
p a d _ lc d _ c o m 0 - p a d _ lc d _ io [ 0 ] (o n )
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