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PCF8532 датащи(PDF) 25 Page - NXP Semiconductors

номер детали PCF8532
подробное описание детали  Universal LCD driver for low multiplex rates
PDF  44 Pages
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производитель  NXP [NXP Semiconductors]
домашняя страница  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCF8532 датащи(HTML) 25 Page - NXP Semiconductors

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PCF8532_1
© NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 1 — 10 February 2009
25 of 44
NXP Semiconductors
PCF8532
Universal LCD driver for low multiplex rates
[1]
Nominal frame frequency calculated for an internal operating frequency of 1.800 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 PCF8532 and co-ordinates their effects. The display
controller is also responsible for loading display data into the display RAM as required by
the filling order.
Table 15.
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
000
60 Hz
001
65 Hz
010
70 Hz
011[2]
75 Hz
100
80 Hz
101
85 Hz
110
90 Hz
111
75 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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