pca85232 NXP Semiconductors, pca85232 Datasheet - Page 28

• Manufacturer Part Number: pca85232
• Description: Pca85232 Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA85232
Product data sheet
7.18 Display controller
Table 16.
[1]
[2]
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.
Bit
7 to 4
3 to 0
Nominal frame frequency calculated for an internal operating frequency of 3.5 kHz.
Power-on and reset value.
Symbol
F[2:0]
-
Frame-frequency prescaler
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Value
11101
000
001
010
011
100
101
110
111
Rev. 1 — 8 December 2010
[2]
Description
Nominal frame frequency
fixed value
defines the division factor for the frame frequency (f
117 Hz
126 Hz
137 Hz
146 Hz
156 Hz
167 Hz
176 Hz
146 Hz
LCD driver for low multiplex rates
[1]
Equation
f
f
f
f
f
f
f
f
fr
fr
fr
fr
fr
fr
fr
fr
=
=
=
=
=
=
=
=
PCA85232
64
----- -
80
64
----- -
74
64
----- -
68
f
------- -
64
----- -
60
64
----- -
56
64
----- -
53
f
------- -
24
24
clk
clk
×
×
×
×
×
×
© NXP B.V. 2010. All rights reserved.
f
------- -
f
------- -
f
------- -
f
------- -
f
------- -
f
------- -
24
24
24
24
24
24
clk
clk
clk
clk
clk
clk
fr
)
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