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PCA85232 Datasheet(PDF) 28 Page - NXP Semiconductors

Part # PCA85232
Description  LCD driver for low multiplex rates
PDF  54 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA85232 Datasheet(HTML) 28 Page - NXP Semiconductors

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PCA85232
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 1 — 8 December 2010
28 of 54
NXP Semiconductors
PCA85232
LCD driver for low multiplex rates
[1]
Nominal frame frequency calculated for an internal operating frequency of 3.5 kHz.
[2]
Power-on and reset value.
7.18 Display controller
The display controller executes the commands identified by the command decoder. It
contains the status registers of the PCA85232 and co-ordinates their effects. The
controller is also responsible for loading display data into the display RAM as required by
the filling order.
Table 16.
Frame-frequency prescaler
Bit
Symbol
Value
Description
Nominal frame frequency[1]
Equation
7 to 4
-
11101
fixed value
3 to 0
F[2:0]
defines the division factor for the frame frequency (ffr)
000
117 Hz
001
126 Hz
010
137 Hz
011[2]
146 Hz
100
156 Hz
101
167 Hz
110
176 Hz
111
146 Hz
f
fr
64
80
------
f
clk
24
--------
×
=
f
fr
64
74
------
f
clk
24
--------
×
=
f
fr
64
68
------
f
clk
24
--------
×
=
f
fr
f
clk
24
--------
=
f
fr
64
60
------
f
clk
24
--------
×
=
f
fr
64
56
------
f
clk
24
--------
×
=
f
fr
64
53
------
f
clk
24
--------
×
=
f
fr
f
clk
24
--------
=



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