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PCA9620 Datasheet(PDF) 9 Page - NXP Semiconductors

Part # PCA9620
Description  Universal LCD driver for low multiplex rates
PDF  71 Pages
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Manufacturer  NXP [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo NXP - NXP Semiconductors

PCA9620 Datasheet(HTML) 9 Page - NXP Semiconductors

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PCA9620
All information provided in this document is subject to legal disclaimers.
© NXP B.V. 2010. All rights reserved.
Product data sheet
Rev. 1 — 9 December 2010
9 of 71
NXP Semiconductors
PCA9620
Universal LCD driver for low multiplex rates
7.1.11 Command: frame-frequency
With the frame-frequency command the frame frequency and the output clock frequency
can be configured.
[1]
Nominal frame frequency calculated for the default clock frequency of 9 600 Hz.
[2]
Duty cycle definition: % HIGH-level time : % LOW-level time.
[3]
Default value.
Table 15.
Load-data-pointer - load data pointer command bit description
Bit
Symbol
Value
Description
7 to 6
-
10
fixed value
5 to 0
P[5:0]
000000 to
111111
6-bit binary value of 0 to 59
Table 16.
Frame frequency - frame frequency and output clock frequency command bit
description
Bit
Symbol
Value
Description
7 to 5
-
011
fixed value
4 to 0
F[4:0]
see Table 17
nominal frame frequency (Hz)
Table 17.
Frame frequency values
F[4:0]
Nominal frame
frequency, ffr (Hz)[1]
Resultant oscillator
frequency, fosc (Hz)
Duty cycle (%)[2]
00000
60
2880
20 : 80
00001
70
3360
7 : 93
00010
80
3840
47 : 53
00011
91
4368
40 : 60
00100
100
4800
33 : 67
00101
109
5232
27 : 73
00110
120
5760
20 : 80
00111
129.7
6226
13 : 87
01000
141.2
6778
5 : 95
01001
150
7200
50 : 50
01010
160
7680
47 : 53
01011
171.4
8227
43 : 57
01100
177.8
8534
41 : 59
01101
192
9216
36 : 64
01110[3]
200
9600
33 : 67
01111
208.7
10018
30 : 70
10000
218.2
10474
27 : 73
10001
228.6
10973
23 : 77
10010
240
11520
20 : 80
10011
252.6
12125
16 : 84
10100, 10101
266.7
12802
10 : 90
10110, 10111
282.4
13555
5 : 95
11000 to 11111
300
14400
50 : 50



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