pcf8532 NXP Semiconductors, pcf8532 Datasheet - Page 25

• Manufacturer Part Number: pcf8532
• Description: Universal Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCF8532_1
Product data sheet
7.18 Display controller
Table 15.
[1]
[2]
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.
Bit
7 to 4
3 to 0
Nominal frame frequency calculated for an internal operating frequency of 1.800 kHz.
Power-on and reset value.
Symbol
-
F[2:0]
Frame-frequency prescaler
Value
11101
000
001
010
011
100
101
110
111
Rev. 1 — 10 February 2009
[2]
Description
Nominal frame frequency
fixed value
defines the division factor for the frame frequency
60 Hz
65 Hz
70 Hz
75 Hz
80 Hz
85 Hz
90 Hz
75 Hz
Universal LCD driver for low multiplex rates
[1]
Equation
f
f
f
f
f
f
f
f
fr
fr
fr
fr
fr
fr
fr
fr
=
=
=
=
=
=
=
=
64
----- -
80
64
----- -
74
64
----- -
68
---------
64
----- -
60
64
----- -
56
64
----- -
53
---------
f
f
24
24
clk
clk
PCF8532
© NXP B.V. 2009. All rights reserved.
---------
---------
---------
---------
---------
---------
f
f
f
f
f
f
24
24
24
24
24
24
clk
clk
clk
clk
clk
clk
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