pca85132 NXP Semiconductors, pca85132 Datasheet - Page 27

• Manufacturer Part Number: pca85132
• Description: Lcd Driver For Low Multiplex Rates
• Manufacturer: NXP Semiconductors

NXP Semiconductors
PCA85132_1
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 PCA85132 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 1.800 kHz.
Power-on and reset value.
Symbol
F[2:0]
-
Frame-frequency prescaler
All information provided in this document is subject to legal disclaimers.
Value
11101
000
001
010
011
100
101
110
111
Rev. 01 — 6 May 2010
[2]
Description
Nominal frame frequency
fixed value
defines the division factor for the frame frequency f
60 Hz
65 Hz
70 Hz
75 Hz
80 Hz
85 Hz
90 Hz
75 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
=
=
=
=
=
=
=
=
PCA85132
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
27 of 53